diff --git a/README.md b/README.md
index ebad1f6f..f8b9e5e0 100644
--- a/README.md
+++ b/README.md
@@ -117,4 +117,4 @@ There are a number of fairly major features in the pipeline, with no particular
 
 - Report bugs and request features on the [GitHub Issues](https://github.com/ripplebiz/MeshCore/issues) page.
 - Find additional guides and components on [my site](https://buymeacoffee.com/ripplebiz).
-- Join [MeshCore Discord](https://discord.gg/BMwCtwHj5V) to chat with the developers and get help from the community.
+- Join [MeshCore Discord](https://meshcore.gg) to chat with the developers and get help from the community.
diff --git a/arch/nrf52/extra_scripts/patch_bluefruit.py b/arch/nrf52/extra_scripts/patch_bluefruit.py
deleted file mode 100644
index b43bffb5..00000000
--- a/arch/nrf52/extra_scripts/patch_bluefruit.py
+++ /dev/null
@@ -1,198 +0,0 @@
-"""
-Bluefruit BLE Patch Script
-
-Patches Bluefruit library to fix semaphore leak bug that causes device lockup
-when BLE central disconnects unexpectedly (e.g., going out of range, supervision timeout).
-
-Patches applied:
-1. BLEConnection.h: Add _hvn_qsize member to track semaphore queue size
-2. BLEConnection.cpp: Store hvn_qsize and restore semaphore on disconnect
-
-Bug description:
-- When a BLE central disconnects unexpectedly (reason=8 supervision timeout),
-  the BLE_GATTS_EVT_HVN_TX_COMPLETE event may never fire
-- This leaves the _hvn_sem counting semaphore in a decremented state
-- Since BLEConnection objects are reused (destructor never called), the
-  semaphore count is never restored
-- Eventually all semaphore counts are exhausted and notify() blocks/fails
-
-"""
-
-from pathlib import Path
-
-Import("env")  # pylint: disable=undefined-variable
-
-
-def _patch_ble_connection_header(source: Path) -> bool:
-    """
-    Add _hvn_qsize member variable to BLEConnection class.
-    
-    This is needed to restore the semaphore to its correct count on disconnect.
-    
-    Returns True if patch was applied or already applied, False on error.
-    """
-    try:
-        content = source.read_text()
-        
-        # Check if already patched
-        if "_hvn_qsize" in content:
-            return True  # Already patched
-        
-        # Find the location to insert - after _phy declaration
-        original_pattern = '''    uint8_t  _phy;
-
-    uint8_t  _role;'''
-        
-        patched_pattern = '''    uint8_t  _phy;
-    uint8_t  _hvn_qsize;
-
-    uint8_t  _role;'''
-        
-        if original_pattern not in content:
-            print("Bluefruit patch: WARNING - BLEConnection.h pattern not found")
-            return False
-        
-        content = content.replace(original_pattern, patched_pattern)
-        source.write_text(content)
-        
-        # Verify
-        if "_hvn_qsize" not in source.read_text():
-            return False
-        
-        return True
-    except Exception as e:
-        print(f"Bluefruit patch: ERROR patching BLEConnection.h: {e}")
-        return False
-
-
-def _patch_ble_connection_source(source: Path) -> bool:
-    """
-    Patch BLEConnection.cpp to:
-    1. Store hvn_qsize in constructor
-    2. Restore _hvn_sem semaphore to full count on disconnect
-    
-    Returns True if patch was applied or already applied, False on error.
-    """
-    try:
-        content = source.read_text()
-        
-        # Check if already patched (look for the restore loop)
-        if "uxSemaphoreGetCount(_hvn_sem)" in content:
-            return True  # Already patched
-        
-        # Patch 1: Store queue size in constructor
-        constructor_original = '''  _hvn_sem   = xSemaphoreCreateCounting(hvn_qsize, hvn_qsize);'''
-        
-        constructor_patched = '''  _hvn_qsize = hvn_qsize;
-  _hvn_sem   = xSemaphoreCreateCounting(hvn_qsize, hvn_qsize);'''
-        
-        if constructor_original not in content:
-            print("Bluefruit patch: WARNING - BLEConnection.cpp constructor pattern not found")
-            return False
-        
-        content = content.replace(constructor_original, constructor_patched)
-        
-        # Patch 2: Restore semaphore on disconnect
-        disconnect_original = '''    case BLE_GAP_EVT_DISCONNECTED:
-      // mark as disconnected
-      _connected = false;
-    break;'''
-        
-        disconnect_patched = '''    case BLE_GAP_EVT_DISCONNECTED:
-      // Restore notification semaphore to full count
-      // This fixes lockup when disconnect occurs with notifications in flight
-      while (uxSemaphoreGetCount(_hvn_sem) < _hvn_qsize) {
-        xSemaphoreGive(_hvn_sem);
-      }
-      // Release indication semaphore if waiting
-      if (_hvc_sem) {
-        _hvc_received = false;
-        xSemaphoreGive(_hvc_sem);
-      }
-      // mark as disconnected
-      _connected = false;
-    break;'''
-        
-        if disconnect_original not in content:
-            print("Bluefruit patch: WARNING - BLEConnection.cpp disconnect pattern not found")
-            return False
-        
-        content = content.replace(disconnect_original, disconnect_patched)
-        source.write_text(content)
-        
-        # Verify
-        verify_content = source.read_text()
-        if "uxSemaphoreGetCount(_hvn_sem)" not in verify_content:
-            return False
-        if "_hvn_qsize = hvn_qsize" not in verify_content:
-            return False
-        
-        return True
-    except Exception as e:
-        print(f"Bluefruit patch: ERROR patching BLEConnection.cpp: {e}")
-        return False
-
-
-def _apply_bluefruit_patches(target, source, env):  # pylint: disable=unused-argument
-    framework_path = env.get("PLATFORMFW_DIR")
-    if not framework_path:
-        framework_path = env.PioPlatform().get_package_dir("framework-arduinoadafruitnrf52")
-
-    if not framework_path:
-        print("Bluefruit patch: ERROR - framework directory not found")
-        env.Exit(1)
-        return
-
-    framework_dir = Path(framework_path)
-    bluefruit_lib = framework_dir / "libraries" / "Bluefruit52Lib" / "src"
-    patch_failed = False
-    
-    # Patch BLEConnection.h
-    conn_header = bluefruit_lib / "BLEConnection.h"
-    if conn_header.exists():
-        before = conn_header.read_text()
-        success = _patch_ble_connection_header(conn_header)
-        after = conn_header.read_text()
-        
-        if success:
-            if before != after:
-                print("Bluefruit patch: OK - Applied BLEConnection.h fix (added _hvn_qsize member)")
-            else:
-                print("Bluefruit patch: OK - BLEConnection.h already patched")
-        else:
-            print("Bluefruit patch: FAILED - BLEConnection.h")
-            patch_failed = True
-    else:
-        print(f"Bluefruit patch: ERROR - BLEConnection.h not found at {conn_header}")
-        patch_failed = True
-    
-    # Patch BLEConnection.cpp
-    conn_source = bluefruit_lib / "BLEConnection.cpp"
-    if conn_source.exists():
-        before = conn_source.read_text()
-        success = _patch_ble_connection_source(conn_source)
-        after = conn_source.read_text()
-        
-        if success:
-            if before != after:
-                print("Bluefruit patch: OK - Applied BLEConnection.cpp fix (restore semaphore on disconnect)")
-            else:
-                print("Bluefruit patch: OK - BLEConnection.cpp already patched")
-        else:
-            print("Bluefruit patch: FAILED - BLEConnection.cpp")
-            patch_failed = True
-    else:
-        print(f"Bluefruit patch: ERROR - BLEConnection.cpp not found at {conn_source}")
-        patch_failed = True
-    
-    if patch_failed:
-        print("Bluefruit patch: CRITICAL - Patch failed! Build aborted.")
-        env.Exit(1)
-
-
-# Register the patch to run before build
-bluefruit_action = env.VerboseAction(_apply_bluefruit_patches, "Applying Bluefruit BLE patches...")
-env.AddPreAction("$BUILD_DIR/${PROGNAME}.elf", bluefruit_action)
-
-# Also run immediately to patch before any compilation
-_apply_bluefruit_patches(None, None, env)
diff --git a/docs/companion_protocol.md b/docs/companion_protocol.md
index bbad1e40..9cc610ff 100644
--- a/docs/companion_protocol.md
+++ b/docs/companion_protocol.md
@@ -283,32 +283,110 @@ Bytes 7+: Message Text (UTF-8, variable length)
 
 ### 6. Send Channel Data Datagram
 
-**Purpose**: Send binary datagram data to a channel.
+**Purpose**: Send a binary datagram to a channel. Unlike channel text messages, datagrams carry no built-in sender identity and no timestamp — applications needing either must encode them inside the binary payload.
 
 **Command Format**:
 ```
-Byte 0: 0x3E
-Bytes 1-2: Data Type (`data_type`, 16-bit little-endian)
-Byte 3: Channel Index (0-7)
-Bytes 4+: Binary payload bytes (variable length)
+Byte 0:                         0x3E
+Byte 1:                         Channel Index (0-7)
+Byte 2:                         Path Length (0xFF = flood, otherwise actual path length)
+Bytes 3 .. 2+path_len:          Path (omitted when path_len == 0xFF)
+Next 2 bytes (little-endian):   Data Type (`data_type`, uint16)
+Remaining bytes:                Binary payload (variable length)
+```
+
+**Example** (flood, `DATA_TYPE_DEV`, payload `A1 B2 C3`, channel 1):
+```
+3E 01 FF FF FF A1 B2 C3
 ```
 
 **Data Type / Transport Mapping**:
-- `0x0000` is invalid for this command.
+- `0x0000` (`DATA_TYPE_RESERVED`) is invalid and rejected with `PACKET_ERROR`.
 - `0xFFFF` (`DATA_TYPE_DEV`) is the developer namespace for experimenting and developing apps.
-- Other non-zero values can be used as assigned application/community namespaces.
-
-**Note**: Applications that need a timestamp should encode it inside the binary payload.
+- Values `0x0001`–`0xFFFE` are available for registered application/community namespaces. See the [Registered data_type values](#registered-data_type-values) table below.
 
 **Limits**:
-- Maximum payload length is `163` bytes.
-- Larger payloads are rejected with `PACKET_ERROR`.
+- Maximum payload length is `MAX_CHANNEL_DATA_LENGTH = MAX_FRAME_SIZE - 9 = 163` bytes.
+- Larger payloads are rejected with `PACKET_ERROR` (`ERR_CODE_ILLEGAL_ARG`).
 
-**Response**: `PACKET_OK` (0x00) on success
+**Response**: `PACKET_OK` (0x00) on success, or `PACKET_ERROR` (0x01) with one of:
+- `ERR_CODE_NOT_FOUND` (2) — unknown `channel_idx`
+- `ERR_CODE_ILLEGAL_ARG` (6) — invalid `path_len`, reserved `data_type` (`0x0000`), or payload larger than `MAX_CHANNEL_DATA_LENGTH`
+- `ERR_CODE_TABLE_FULL` (3) — outbound send queue is full; retry later
+
+**Inbound datagrams** are delivered to the host via `RESP_CODE_CHANNEL_DATA_RECV` (0x1B); see [Receive Channel Data Datagram](#receive-channel-data-datagram).
+
+#### Registered `data_type` values
+
+`data_type` is an **application identifier**, not a payload-format identifier. Each registered value identifies an application that owns its own internal payload schemas. The firmware does not inspect payload contents — `data_type` is transported opaquely.
+
+| Value           | Constant             | Purpose                                                                  |
+|-----------------|----------------------|--------------------------------------------------------------------------|
+| 0x0000          | `DATA_TYPE_RESERVED` | Reserved; invalid on send                                                |
+| 0x0001 – 0x00FF | —                    | Reserved for internal use                                                |
+| 0x0100 – 0xFEFF | —                    | Registered application namespaces (see [number_allocations.md](number_allocations.md)) |
+| 0xFF00 – 0xFFFE | —                    | Testing/development; no registration required                            |
+| 0xFFFF          | `DATA_TYPE_DEV`      | Developer/experimental namespace                                         |
+
+To register a new application, submit a PR adding a row to the table in [docs/number_allocations.md](number_allocations.md). Internal sub-formats within an allocated application ID are owned by that application and are not tracked in MeshCore firmware or this document.
 
 ---
 
-### 6. Get Message
+### Receive Channel Data Datagram
+
+Inbound group datagrams (radio-level `PAYLOAD_TYPE_GRP_DATA`, 0x06) are forwarded to the host as `RESP_CODE_CHANNEL_DATA_RECV` notifications.
+
+**Frame Format** (`RESP_CODE_CHANNEL_DATA_RECV`, 0x1B):
+```
+Byte 0:                 0x1B (packet type)
+Byte 1:                 SNR (signed int8, scaled ×4 — divide by 4.0 to recover dB)
+Bytes 2-3:              Reserved (clients MUST ignore)
+Byte 4:                 Channel Index (0-7)
+Byte 5:                 Path Length (actual path length when flooded, otherwise 0xFF for direct)
+Bytes 6-7:              Data Type (uint16 little-endian)
+Byte 8:                 Data Length
+Bytes 9 .. 8+data_len:  Payload
+```
+
+**Path bytes are not forwarded**: Only `path_len` is reported in the receive frame — the path itself is not copied to the host. There are no path bytes between byte 5 and the data_type field at bytes 6–7, regardless of `path_len`.
+
+**Path Length semantics differ between send and receive**:
+
+| Direction | `path_len = 0xFF`               | `path_len ≠ 0xFF`                                                                   |
+|-----------|---------------------------------|-------------------------------------------------------------------------------------|
+| Send      | Flood the network               | Direct route; the encoded path follows (low 6 bits = hash count, top 2 bits + 1 = hash size; on-wire byte count = `hash_count × hash_size`) |
+| Receive   | Packet arrived via direct route | Packet was flooded; this is the encoded `pkt->path_len` field as observed (no path bytes follow) |
+
+In other words, the meaning of `0xFF` is inverted between the two directions, and on receive the field carries metadata only — never a routable path. `path_len` is an encoded byte (see `Packet::isValidPathLen` / `Packet::writePath` in `src/Packet.cpp`), not a raw byte count.
+
+**Note**: The device may also emit `PACKET_MESSAGES_WAITING` (0x83) to notify the host that datagrams are queued; poll with `CMD_SYNC_NEXT_MESSAGE` (0x0A) to retrieve them.
+
+**Parsing Pseudocode**:
+```python
+def parse_channel_data_recv(data):
+    if len(data) < 9:
+        return None
+    snr_byte = data[1]
+    snr = (snr_byte if snr_byte < 128 else snr_byte - 256) / 4.0
+    channel_idx = data[4]
+    path_len = data[5]
+    data_type = int.from_bytes(data[6:8], 'little')
+    data_len = data[8]
+    if 9 + data_len > len(data):
+        return None
+    payload = data[9:9 + data_len]
+    return {
+        'snr': snr,
+        'channel_idx': channel_idx,
+        'path_len': path_len,
+        'data_type': data_type,
+        'payload': bytes(payload),
+    }
+```
+
+---
+
+### 7. Get Message
 
 **Purpose**: Request the next queued message from the device.
 
@@ -325,13 +403,14 @@ Byte 0: 0x0A
 **Response**: 
 - `PACKET_CHANNEL_MSG_RECV` (0x08) or `PACKET_CHANNEL_MSG_RECV_V3` (0x11) for channel messages
 - `PACKET_CONTACT_MSG_RECV` (0x07) or `PACKET_CONTACT_MSG_RECV_V3` (0x10) for contact messages
+- `PACKET_CHANNEL_DATA_RECV` (0x1B) for channel data datagrams
 - `PACKET_NO_MORE_MSGS` (0x0A) if no messages available
 
 **Note**: Poll this command periodically to retrieve queued messages. The device may also send `PACKET_MESSAGES_WAITING` (0x83) as a notification when messages are available.
 
 ---
 
-### 7. Get Battery and Storage
+### 8. Get Battery and Storage
 
 **Purpose**: Query device battery voltage and storage usage.
 
@@ -527,6 +606,15 @@ Use the `SEND_CHANNEL_MESSAGE` command (see [Commands](#commands)).
 
 ## Response Parsing
 
+### Terminology
+
+This document uses a spec-level naming convention (`PACKET_*`) for bytes the firmware sends back to the host. In the firmware source these same values are split across two `#define` families by purpose:
+
+- `RESP_CODE_*` — direct replies to a command (e.g. `RESP_CODE_CHANNEL_DATA_RECV` = `PACKET_CHANNEL_DATA_RECV` = 0x1B).
+- `PUSH_CODE_*` — asynchronous notifications not tied to a specific command (e.g. `PUSH_CODE_MSG_WAITING` = `PACKET_MESSAGES_WAITING` = 0x83).
+
+Byte values are authoritative; names are aliases. When reading firmware source, `RESP_CODE_X` / `PUSH_CODE_X` correspond to this doc's `PACKET_X` of the same numeric value.
+
 ### Packet Types
 
 | Value | Name                       | Description                   |
@@ -547,6 +635,7 @@ Use the `SEND_CHANNEL_MESSAGE` command (see [Commands](#commands)).
 | 0x10  | PACKET_CONTACT_MSG_RECV_V3 | Contact message (V3 with SNR) |
 | 0x11  | PACKET_CHANNEL_MSG_RECV_V3 | Channel message (V3 with SNR) |
 | 0x12  | PACKET_CHANNEL_INFO        | Channel information           |
+| 0x1B  | PACKET_CHANNEL_DATA_RECV   | Channel data datagram         |
 | 0x80  | PACKET_ADVERTISEMENT       | Advertisement packet          |
 | 0x82  | PACKET_ACK                 | Acknowledgment                |
 | 0x83  | PACKET_MESSAGES_WAITING    | Messages waiting notification |
@@ -718,22 +807,18 @@ Bytes 1-6: ACK Code (6 bytes, hex)
 
 ### Error Codes
 
-**PACKET_ERROR** (0x01) may include an error code in byte 1:
+`PACKET_ERROR` (0x01) carries a single-byte error code in byte 1. Values match the `ERR_CODE_*` constants defined in `examples/companion_radio/MyMesh.cpp`:
 
-| Error Code | Description |
-|------------|-------------|
-| 0x00 | Generic error (no specific code) |
-| 0x01 | Invalid command |
-| 0x02 | Invalid parameter |
-| 0x03 | Channel not found |
-| 0x04 | Channel already exists |
-| 0x05 | Channel index out of range |
-| 0x06 | Secret mismatch |
-| 0x07 | Message too long |
-| 0x08 | Device busy |
-| 0x09 | Not enough storage |
+| Code | Constant (firmware)        | Description                                                                  |
+|------|----------------------------|------------------------------------------------------------------------------|
+| 1    | `ERR_CODE_UNSUPPORTED_CMD` | Unknown or unsupported command byte / sub-command                            |
+| 2    | `ERR_CODE_NOT_FOUND`       | Target not found (channel, contact, message, etc.)                           |
+| 3    | `ERR_CODE_TABLE_FULL`      | Internal queue or table is full — retry later                                |
+| 4    | `ERR_CODE_BAD_STATE`       | Operation not valid in current device state (e.g. iterator already running)  |
+| 5    | `ERR_CODE_FILE_IO_ERROR`   | Filesystem or storage I/O failure                                            |
+| 6    | `ERR_CODE_ILLEGAL_ARG`     | Invalid argument (bad length, out-of-range value, reserved field, etc.)      |
 
-**Note**: Error codes may vary by firmware version. Always check byte 1 of `PACKET_ERROR` response.
+**Note**: Error codes may vary by firmware version. Always check byte 1 of `PACKET_ERROR` response, and treat unknown codes as generic errors.
 
 ### Frame Handling
 
@@ -765,7 +850,8 @@ BLE implementations enqueue and deliver one protocol frame per BLE write/notific
      - `GET_CHANNEL` → `PACKET_CHANNEL_INFO`
      - `SET_CHANNEL` → `PACKET_OK` or `PACKET_ERROR`
      - `SEND_CHANNEL_MESSAGE` → `PACKET_MSG_SENT`
-     - `GET_MESSAGE` → `PACKET_CHANNEL_MSG_RECV`, `PACKET_CONTACT_MSG_RECV`, or `PACKET_NO_MORE_MSGS`
+     - `GET_MESSAGE` → `PACKET_CHANNEL_MSG_RECV`, `PACKET_CONTACT_MSG_RECV`, `PACKET_CHANNEL_DATA_RECV`, or `PACKET_NO_MORE_MSGS`
+     - `SEND_CHANNEL_DATA` → `PACKET_OK` or `PACKET_ERROR`
      - `GET_BATTERY` → `PACKET_BATTERY`
 
 4. **Timeout Handling**:
diff --git a/docs/faq.md b/docs/faq.md
index 9fe1534a..3edc0a69 100644
--- a/docs/faq.md
+++ b/docs/faq.md
@@ -194,7 +194,7 @@ Recently, as of October 2025, many regions have moved to the "narrow" setting, a
 
 After extensive testing, many regions have switched or about to switch over to BW62.5 and SF7, 8, or 9.  Narrower bandwidth setting and lower SF setting allow MeshCore's radio signals to fit between interference in the ISM band, provide for a lower noise floor, better SNR, and faster transmissions.
 
-If you have consensus from your community in your region to update your region's preset recommendation, please post your update request on  the [#meshcore-app](https://discord.com/channels/1343693475589263471/1391681655911088241) channel on the [MeshCore Discord server ](https://discord.gg/cYtQNYCCRK) to let Liam Cottle know.
+If you have consensus from your community in your region to update your region's preset recommendation, please post your update request on  the [#meshcore-app](https://discord.com/channels/1343693475589263471/1391681655911088241) channel on the [MeshCore Discord server ](https://meshcore.gg) to let Liam Cottle know.
 
 
 
@@ -526,7 +526,7 @@ The third character is the capital letter 'O', not zero `0`
 - Firmware repo: https://github.com/meshcore-dev/MeshCore
 
 ### 5.8. Q: How can I support MeshCore?
-**A:** Provide your honest feedback on GitHub and on [MeshCore Discord server](https://discord.gg/BMwCtwHj5V). Spread the word of MeshCore to your friends and communities; help them get started with MeshCore. Support Scott's MeshCore development at <https://buymeacoffee.com/ripplebiz>.
+**A:** Provide your honest feedback on GitHub and on [MeshCore Discord server](https://meshcore.gg). Spread the word of MeshCore to your friends and communities; help them get started with MeshCore. Support Scott's MeshCore development at <https://buymeacoffee.com/ripplebiz>.
 
 Support Liam Cottle's smartphone client development by unlocking the server administration wait gate with in-app purchase
 
diff --git a/docs/number_allocations.md b/docs/number_allocations.md
index 94ad1efd..c4715c5e 100644
--- a/docs/number_allocations.md
+++ b/docs/number_allocations.md
@@ -15,6 +15,7 @@ Once you have a working app/project, you need to be able to demonstrate it exist
 | Data-Type range | App name                    | Contact                                              |
 |-----------------|-----------------------------|------------------------------------------------------|
 | 0000 - 00FF     | -reserved for internal use- |  |
+| 0100            | MeshCore Open               | zsylvester@monitormx.com — https://github.com/zjs81/meshcore-open |
 | FF00 - FFFF     | -reserved for testing/dev-  |  |
 
 (add rows, inside the range 0100 - FEFF for custom apps)
diff --git a/examples/companion_radio/ui-new/UITask.cpp b/examples/companion_radio/ui-new/UITask.cpp
index 94a8ee3e..49c75a5b 100644
--- a/examples/companion_radio/ui-new/UITask.cpp
+++ b/examples/companion_radio/ui-new/UITask.cpp
@@ -57,13 +57,21 @@ public:
     int logoWidth = 128;
     display.drawXbm((display.width() - logoWidth) / 2, 3, meshcore_logo, logoWidth, 13);
 
+    // meshcore website
+    const char* website = "https://meshcore.io";
+    display.setColor(DisplayDriver::LIGHT);
+    display.setTextSize(1);
+    uint16_t websiteWidth = display.getTextWidth(website);
+    display.setCursor((display.width() - websiteWidth) / 2, 22);
+    display.print(website);
+
     // version info
     display.setColor(DisplayDriver::LIGHT);
-    display.setTextSize(2);
-    display.drawTextCentered(display.width()/2, 22, _version_info);
+    display.setTextSize(1);
+    display.drawTextCentered(display.width()/2, 35, _version_info);
 
     display.setTextSize(1);
-    display.drawTextCentered(display.width()/2, 42, FIRMWARE_BUILD_DATE);
+    display.drawTextCentered(display.width()/2, 48, FIRMWARE_BUILD_DATE);
 
     return 1000;
   }
@@ -146,7 +154,7 @@ class HomeScreen : public UIScreen {
   bool sensors_scroll = false;
   int sensors_scroll_offset = 0;
   int next_sensors_refresh = 0;
-  
+
   void refresh_sensors() {
     if (millis() > next_sensors_refresh) {
       sensors_lpp.reset();
@@ -170,7 +178,7 @@ class HomeScreen : public UIScreen {
 
 public:
   HomeScreen(UITask* task, mesh::RTCClock* rtc, SensorManager* sensors, NodePrefs* node_prefs)
-     : _task(task), _rtc(rtc), _sensors(sensors), _node_prefs(node_prefs), _page(0), 
+     : _task(task), _rtc(rtc), _sensors(sensors), _node_prefs(node_prefs), _page(0),
        _shutdown_init(false), sensors_lpp(200) {  }
 
   void poll() override {
@@ -213,7 +221,7 @@ public:
         IPAddress ip = WiFi.localIP();
         snprintf(tmp, sizeof(tmp), "IP: %d.%d.%d.%d", ip[0], ip[1], ip[2], ip[3]);
         display.setTextSize(1);
-        display.drawTextCentered(display.width() / 2, 54, tmp); 
+        display.drawTextCentered(display.width() / 2, 54, tmp);
       #endif
       if (_task->hasConnection()) {
         display.setColor(DisplayDriver::GREEN);
@@ -241,10 +249,10 @@ public:
         } else {
           sprintf(tmp, "%dh", secs / (60*60));
         }
-        
+
         int timestamp_width = display.getTextWidth(tmp);
         int max_name_width = display.width() - timestamp_width - 1;
-        
+
         char filtered_recent_name[sizeof(a->name)];
         display.translateUTF8ToBlocks(filtered_recent_name, a->name, sizeof(filtered_recent_name));
         display.drawTextEllipsized(0, y, max_name_width, filtered_recent_name);
@@ -310,7 +318,7 @@ public:
         display.drawTextRightAlign(display.width()-1, y, buf);
         y = y + 12;
         display.drawTextLeftAlign(0, y, "pos");
-        sprintf(buf, "%.4f %.4f", 
+        sprintf(buf, "%.4f %.4f",
           nmea->getLatitude()/1000000., nmea->getLongitude()/1000000.);
         display.drawTextRightAlign(display.width()-1, y, buf);
         y = y + 12;
@@ -741,7 +749,7 @@ void UITask::loop() {
 #endif
 #if defined(PIN_USER_BTN_ANA)
   if (abs(millis() - _analogue_pin_read_millis) > 10) {
-    ev = analog_btn.check();
+    int ev = analog_btn.check();
     if (ev == BUTTON_EVENT_CLICK) {
       c = checkDisplayOn(KEY_NEXT);
     } else if (ev == BUTTON_EVENT_LONG_PRESS) {
@@ -878,7 +886,7 @@ bool UITask::getGPSState() {
         return !strcmp(_sensors->getSettingValue(i), "1");
       }
     }
-  } 
+  }
   return false;
 }
 
diff --git a/examples/kiss_modem/main.cpp b/examples/kiss_modem/main.cpp
index 35079592..bc7508a8 100644
--- a/examples/kiss_modem/main.cpp
+++ b/examples/kiss_modem/main.cpp
@@ -10,7 +10,10 @@
   #include <LittleFS.h>
 #elif defined(ESP32)
   #include <SPIFFS.h>
+#else
+  #include <InternalFileSystem.h>
 #endif
+
 #if defined(KISS_UART_RX) && defined(KISS_UART_TX)
   #include <HardwareSerial.h>
 #endif
@@ -29,7 +32,7 @@ void halt() {
 }
 
 void loadOrCreateIdentity() {
-#if defined(NRF52_PLATFORM)
+#if defined(NRF52_PLATFORM) || defined(STM32_PLATFORM)
   InternalFS.begin();
   IdentityStore store(InternalFS, "");
 #elif defined(ESP32)
diff --git a/examples/simple_repeater/UITask.cpp b/examples/simple_repeater/UITask.cpp
index acb46325..6a851438 100644
--- a/examples/simple_repeater/UITask.cpp
+++ b/examples/simple_repeater/UITask.cpp
@@ -52,17 +52,25 @@ void UITask::renderCurrScreen() {
     int logoWidth = 128;
     _display->drawXbm((_display->width() - logoWidth) / 2, 3, meshcore_logo, logoWidth, 13);
 
+    // meshcore website
+    const char* website = "https://meshcore.io";
+    _display->setColor(DisplayDriver::LIGHT);
+    _display->setTextSize(1);
+    uint16_t websiteWidth = _display->getTextWidth(website);
+    _display->setCursor((_display->width() - websiteWidth) / 2, 22);
+    _display->print(website);
+
     // version info
     _display->setColor(DisplayDriver::LIGHT);
     _display->setTextSize(1);
     uint16_t versionWidth = _display->getTextWidth(_version_info);
-    _display->setCursor((_display->width() - versionWidth) / 2, 22);
+    _display->setCursor((_display->width() - versionWidth) / 2, 35);
     _display->print(_version_info);
 
     // node type
     const char* node_type = "< Repeater >";
     uint16_t typeWidth = _display->getTextWidth(node_type);
-    _display->setCursor((_display->width() - typeWidth) / 2, 35);
+    _display->setCursor((_display->width() - typeWidth) / 2, 48);
     _display->print(node_type);
   } else {  // home screen
     // node name
diff --git a/examples/simple_room_server/UITask.cpp b/examples/simple_room_server/UITask.cpp
index 42bc14d4..640a1d2d 100644
--- a/examples/simple_room_server/UITask.cpp
+++ b/examples/simple_room_server/UITask.cpp
@@ -52,17 +52,25 @@ void UITask::renderCurrScreen() {
     int logoWidth = 128;
     _display->drawXbm((_display->width() - logoWidth) / 2, 3, meshcore_logo, logoWidth, 13);
 
+    // meshcore website
+    const char* website = "https://meshcore.io";
+    _display->setColor(DisplayDriver::LIGHT);
+    _display->setTextSize(1);
+    uint16_t websiteWidth = _display->getTextWidth(website);
+    _display->setCursor((_display->width() - websiteWidth) / 2, 22);
+    _display->print(website);
+
     // version info
     _display->setColor(DisplayDriver::LIGHT);
     _display->setTextSize(1);
     uint16_t versionWidth = _display->getTextWidth(_version_info);
-    _display->setCursor((_display->width() - versionWidth) / 2, 22);
+    _display->setCursor((_display->width() - versionWidth) / 2, 35);
     _display->print(_version_info);
 
     // node type
     const char* node_type = "< Room Server >";
     uint16_t typeWidth = _display->getTextWidth(node_type);
-    _display->setCursor((_display->width() - typeWidth) / 2, 35);
+    _display->setCursor((_display->width() - typeWidth) / 2, 48);
     _display->print(node_type);
   } else {  // home screen
     // node name
diff --git a/examples/simple_sensor/SensorMesh.h b/examples/simple_sensor/SensorMesh.h
index ee5d5e02..424b16c1 100644
--- a/examples/simple_sensor/SensorMesh.h
+++ b/examples/simple_sensor/SensorMesh.h
@@ -34,11 +34,11 @@
 #define PERM_RECV_ALERTS_HI    (1 << 7)   // high priority alerts
 
 #ifndef FIRMWARE_BUILD_DATE
-  #define FIRMWARE_BUILD_DATE   "20 Mar 2026"
+  #define FIRMWARE_BUILD_DATE   "19 Apr 2026"
 #endif
 
 #ifndef FIRMWARE_VERSION
-  #define FIRMWARE_VERSION   "v1.14.1"
+  #define FIRMWARE_VERSION   "v1.15.0"
 #endif
 
 #define FIRMWARE_ROLE "sensor"
diff --git a/examples/simple_sensor/UITask.cpp b/examples/simple_sensor/UITask.cpp
index 0e78fee0..757ea1dc 100644
--- a/examples/simple_sensor/UITask.cpp
+++ b/examples/simple_sensor/UITask.cpp
@@ -52,17 +52,25 @@ void UITask::renderCurrScreen() {
     int logoWidth = 128;
     _display->drawXbm((_display->width() - logoWidth) / 2, 3, meshcore_logo, logoWidth, 13);
 
+    // meshcore website
+    const char* website = "https://meshcore.io";
+    _display->setColor(DisplayDriver::LIGHT);
+    _display->setTextSize(1);
+    uint16_t websiteWidth = _display->getTextWidth(website);
+    _display->setCursor((_display->width() - websiteWidth) / 2, 22);
+    _display->print(website);
+
     // version info
     _display->setColor(DisplayDriver::LIGHT);
     _display->setTextSize(1);
     uint16_t versionWidth = _display->getTextWidth(_version_info);
-    _display->setCursor((_display->width() - versionWidth) / 2, 22);
+    _display->setCursor((_display->width() - versionWidth) / 2, 35);
     _display->print(_version_info);
 
     // node type
     const char* node_type = "< Sensor >";
     uint16_t typeWidth = _display->getTextWidth(node_type);
-    _display->setCursor((_display->width() - typeWidth) / 2, 35);
+    _display->setCursor((_display->width() - typeWidth) / 2, 48);
     _display->print(node_type);
   } else {  // home screen
     // node name
diff --git a/platformio.ini b/platformio.ini
index 864e5e1f..ba27abb9 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -10,8 +10,8 @@
 
 [platformio]
 extra_configs =
-	variants/*/platformio.ini
-	platformio.local.ini
+  variants/*/platformio.ini
+  platformio.local.ini
 
 [arduino_base]
 framework = arduino
@@ -81,10 +81,11 @@ platform = https://github.com/pioarduino/platform-espressif32/releases/download/
 extends = arduino_base
 platform = nordicnrf52
 platform_packages =
-  framework-arduinoadafruitnrf52 @ 1.10700.0
-extra_scripts =
-  create-uf2.py
-  arch/nrf52/extra_scripts/patch_bluefruit.py
+  ; use internal fork that includes patch to ble stack to prevent firmware lockup during rapid connect/disconnect
+  ; https://github.com/meshcore-dev/MeshCore/pull/1177
+  ; https://github.com/meshcore-dev/MeshCore/pull/1295
+  framework-arduinoadafruitnrf52 @ https://github.com/meshcore-dev/Adafruit_nRF52_Arduino#d541301
+extra_scripts = create-uf2.py
 build_flags = ${arduino_base.build_flags}
   -D NRF52_PLATFORM
   -D LFS_NO_ASSERT=1
diff --git a/src/helpers/radiolib/CustomLLCC68Wrapper.h b/src/helpers/radiolib/CustomLLCC68Wrapper.h
index fc0975cf..793ba335 100644
--- a/src/helpers/radiolib/CustomLLCC68Wrapper.h
+++ b/src/helpers/radiolib/CustomLLCC68Wrapper.h
@@ -20,6 +20,7 @@ public:
     int sf = ((CustomLLCC68 *)_radio)->spreadingFactor;
     return packetScoreInt(snr, sf, packet_len);
   }
+  uint8_t getSpreadingFactor() const override { return ((CustomLLCC68 *)_radio)->spreadingFactor; }
 
   void doResetAGC() override { sx126xResetAGC((SX126x *)_radio); }
 
diff --git a/src/helpers/radiolib/CustomLR1110.h b/src/helpers/radiolib/CustomLR1110.h
index 7c3685a1..4061c6b1 100644
--- a/src/helpers/radiolib/CustomLR1110.h
+++ b/src/helpers/radiolib/CustomLR1110.h
@@ -36,4 +36,6 @@ class CustomLR1110 : public LR1110 {
       bool detected = ((irq & RADIOLIB_LR11X0_IRQ_SYNC_WORD_HEADER_VALID) || (irq & RADIOLIB_LR11X0_IRQ_PREAMBLE_DETECTED));
       return detected;
     }
+
+    uint8_t getSpreadingFactor() const { return spreadingFactor; }
 };
\ No newline at end of file
diff --git a/src/helpers/radiolib/CustomLR1110Wrapper.h b/src/helpers/radiolib/CustomLR1110Wrapper.h
index 42d36440..0445262b 100644
--- a/src/helpers/radiolib/CustomLR1110Wrapper.h
+++ b/src/helpers/radiolib/CustomLR1110Wrapper.h
@@ -19,12 +19,14 @@ public:
 
   void onSendFinished() override {
     RadioLibWrapper::onSendFinished();
-    _radio->setPreambleLength(16); // overcomes weird issues with small and big pkts
+    _radio->setPreambleLength(preambleLengthForSF(getSpreadingFactor())); // overcomes weird issues with small and big pkts
   }
 
   float getLastRSSI() const override { return ((CustomLR1110 *)_radio)->getRSSI(); }
   float getLastSNR() const override { return ((CustomLR1110 *)_radio)->getSNR(); }
 
+  uint8_t getSpreadingFactor() const override { return ((CustomLR1110 *)_radio)->getSpreadingFactor(); }
+  
   void setRxBoostedGainMode(bool en) override {
     ((CustomLR1110 *)_radio)->setRxBoostedGainMode(en);
   }
diff --git a/src/helpers/radiolib/CustomSTM32WLxWrapper.h b/src/helpers/radiolib/CustomSTM32WLxWrapper.h
index e3e52029..cccdc043 100644
--- a/src/helpers/radiolib/CustomSTM32WLxWrapper.h
+++ b/src/helpers/radiolib/CustomSTM32WLxWrapper.h
@@ -21,6 +21,7 @@ public:
     int sf = ((CustomSTM32WLx *)_radio)->spreadingFactor;
     return packetScoreInt(snr, sf, packet_len);
   }
+  uint8_t getSpreadingFactor() const override { return ((CustomSTM32WLx *)_radio)->spreadingFactor; }
 
   void doResetAGC() override { sx126xResetAGC((SX126x *)_radio); }
 };
diff --git a/src/helpers/radiolib/CustomSX1262Wrapper.h b/src/helpers/radiolib/CustomSX1262Wrapper.h
index 6499deb2..e13561a4 100644
--- a/src/helpers/radiolib/CustomSX1262Wrapper.h
+++ b/src/helpers/radiolib/CustomSX1262Wrapper.h
@@ -24,6 +24,7 @@ public:
     int sf = ((CustomSX1262 *)_radio)->spreadingFactor;
     return packetScoreInt(snr, sf, packet_len);
   }
+  uint8_t getSpreadingFactor() const override { return ((CustomSX1262 *)_radio)->spreadingFactor; }
   virtual void powerOff() override {
     ((CustomSX1262 *)_radio)->sleep(false);
   }
diff --git a/src/helpers/radiolib/CustomSX1268Wrapper.h b/src/helpers/radiolib/CustomSX1268Wrapper.h
index 54c37ee8..f24ab41c 100644
--- a/src/helpers/radiolib/CustomSX1268Wrapper.h
+++ b/src/helpers/radiolib/CustomSX1268Wrapper.h
@@ -24,6 +24,7 @@ public:
     int sf = ((CustomSX1268 *)_radio)->spreadingFactor;
     return packetScoreInt(snr, sf, packet_len);
   }
+  uint8_t getSpreadingFactor() const override { return ((CustomSX1268 *)_radio)->spreadingFactor; }
 
   void doResetAGC() override { sx126xResetAGC((SX126x *)_radio); }
 
diff --git a/src/helpers/radiolib/CustomSX1276Wrapper.h b/src/helpers/radiolib/CustomSX1276Wrapper.h
index 5cde72f7..afe2cc04 100644
--- a/src/helpers/radiolib/CustomSX1276Wrapper.h
+++ b/src/helpers/radiolib/CustomSX1276Wrapper.h
@@ -23,4 +23,5 @@ public:
     int sf = ((CustomSX1276 *)_radio)->spreadingFactor;
     return packetScoreInt(snr, sf, packet_len);
   }
+  uint8_t getSpreadingFactor() const override { return ((CustomSX1276 *)_radio)->spreadingFactor; }
 };
diff --git a/src/helpers/radiolib/RadioLibWrappers.cpp b/src/helpers/radiolib/RadioLibWrappers.cpp
index 2216ca8f..85f3a935 100644
--- a/src/helpers/radiolib/RadioLibWrappers.cpp
+++ b/src/helpers/radiolib/RadioLibWrappers.cpp
@@ -26,6 +26,8 @@ void setFlag(void) {
 
 void RadioLibWrapper::begin() {
   _radio->setPacketReceivedAction(setFlag);  // this is also SentComplete interrupt
+  _preamble_sf = getSpreadingFactor();
+  _radio->setPreambleLength(preambleLengthForSF(_preamble_sf)); // longer preamble for lower SF improves reliability
   state = STATE_IDLE;
 
   if (_board->getStartupReason() == BD_STARTUP_RX_PACKET) {  // received a LoRa packet (while in deep sleep)
diff --git a/src/helpers/radiolib/RadioLibWrappers.h b/src/helpers/radiolib/RadioLibWrappers.h
index a42e060a..ff951aaa 100644
--- a/src/helpers/radiolib/RadioLibWrappers.h
+++ b/src/helpers/radiolib/RadioLibWrappers.h
@@ -11,6 +11,7 @@ protected:
   int16_t _noise_floor, _threshold;
   uint16_t _num_floor_samples;
   int32_t _floor_sample_sum;
+  uint8_t _preamble_sf;
 
   void idle();
   void startRecv();
@@ -19,7 +20,7 @@ protected:
   virtual void doResetAGC();
 
 public:
-  RadioLibWrapper(PhysicalLayer& radio, mesh::MainBoard& board) : _radio(&radio), _board(&board) { n_recv = n_sent = 0; }
+  RadioLibWrapper(PhysicalLayer& radio, mesh::MainBoard& board) : _radio(&radio), _board(&board), _preamble_sf(0) { n_recv = n_sent = 0; }
 
   void begin() override;
   virtual void powerOff() { _radio->sleep(); }
@@ -38,6 +39,9 @@ public:
   }
 
   virtual float getCurrentRSSI() =0;
+  virtual uint8_t getSpreadingFactor() const { return LORA_SF; }
+  static uint16_t preambleLengthForSF(uint8_t sf) { return sf <= 8 ? 32 : 16; }
+  void updatePreamble(uint8_t sf) { _preamble_sf = sf; _radio->setPreambleLength(preambleLengthForSF(sf)); }
 
   int getNoiseFloor() const override { return _noise_floor; }
   void triggerNoiseFloorCalibrate(int threshold) override;
diff --git a/variants/ebyte_eora_s3/platformio.ini b/variants/ebyte_eora_s3/platformio.ini
index d807b978..15fe761b 100644
--- a/variants/ebyte_eora_s3/platformio.ini
+++ b/variants/ebyte_eora_s3/platformio.ini
@@ -135,3 +135,8 @@ build_src_filter = ${Ebyte_EoRa-S3.build_src_filter}
 lib_deps =
   ${Ebyte_EoRa-S3.lib_deps}
   densaugeo/base64 @ ~1.4.0
+
+[env:Ebyte_EoRa-S3_kiss_modem]
+extends = Ebyte_EoRa-S3
+build_src_filter = ${Ebyte_EoRa-S3.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/ebyte_eora_s3/target.cpp b/variants/ebyte_eora_s3/target.cpp
index 501f560b..9e656cc2 100644
--- a/variants/ebyte_eora_s3/target.cpp
+++ b/variants/ebyte_eora_s3/target.cpp
@@ -73,6 +73,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/gat562_30s_mesh_kit/platformio.ini b/variants/gat562_30s_mesh_kit/platformio.ini
index 1467f0fa..2baac256 100644
--- a/variants/gat562_30s_mesh_kit/platformio.ini
+++ b/variants/gat562_30s_mesh_kit/platformio.ini
@@ -112,3 +112,7 @@ lib_deps =
   densaugeo/base64 @ ~1.4.0
   end2endzone/NonBlockingRTTTL@^1.3.0
 
+[env:GAT562_30S_Mesh_Kit_kiss_modem]
+extends = GAT562_30S_Mesh_Kit
+build_src_filter = ${GAT562_30S_Mesh_Kit.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/gat562_mesh_evb_pro/platformio.ini b/variants/gat562_mesh_evb_pro/platformio.ini
index cede9c97..b3e89417 100644
--- a/variants/gat562_mesh_evb_pro/platformio.ini
+++ b/variants/gat562_mesh_evb_pro/platformio.ini
@@ -50,3 +50,8 @@ build_flags =
 ;  -D MESH_DEBUG=1
 build_src_filter = ${GAT562_Mesh_EVB_Pro.build_src_filter}
   +<../examples/simple_room_server>
+
+[env:GAT562_Mesh_EVB_Pro_kiss_modem]
+extends = GAT562_Mesh_EVB_Pro
+build_src_filter = ${GAT562_Mesh_EVB_Pro.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/gat562_mesh_tracker_pro/platformio.ini b/variants/gat562_mesh_tracker_pro/platformio.ini
index 8a947bce..af153b8f 100644
--- a/variants/gat562_mesh_tracker_pro/platformio.ini
+++ b/variants/gat562_mesh_tracker_pro/platformio.ini
@@ -106,3 +106,7 @@ lib_deps =
   ${GAT562_Mesh_Tracker_Pro.lib_deps}
   densaugeo/base64 @ ~1.4.0
 
+[env:GAT562_Mesh_Tracker_Pro_kiss_modem]
+extends = GAT562_Mesh_Tracker_Pro
+build_src_filter = ${GAT562_Mesh_Tracker_Pro.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/gat562_mesh_watch13/platformio.ini b/variants/gat562_mesh_watch13/platformio.ini
index ef30829d..f3510b74 100644
--- a/variants/gat562_mesh_watch13/platformio.ini
+++ b/variants/gat562_mesh_watch13/platformio.ini
@@ -87,3 +87,7 @@ lib_deps =
   ${GAT562_Mesh_Watch13.lib_deps}
   densaugeo/base64 @ ~1.4.0
 
+[env:GAT562_Mesh_Watch13_kiss_modem]
+extends = GAT562_Mesh_Watch13
+build_src_filter = ${GAT562_Mesh_Watch13.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/generic-e22/platformio.ini b/variants/generic-e22/platformio.ini
index 6b7bfd4e..dfa2ff64 100644
--- a/variants/generic-e22/platformio.ini
+++ b/variants/generic-e22/platformio.ini
@@ -95,6 +95,11 @@ lib_deps =
   ${Generic_E22.lib_deps}
   ${esp32_ota.lib_deps}
 
+[env:Generic_E22_kiss_modem]
+extends = Generic_E22
+build_src_filter = ${Generic_E22.build_src_filter}
+  +<../examples/kiss_modem/>
+
 [env:Generic_E22_sx1268_repeater]
 extends = Generic_E22
 build_src_filter = ${Generic_E22.build_src_filter}
diff --git a/variants/generic-e22/target.cpp b/variants/generic-e22/target.cpp
index d4169b09..ea9664fd 100644
--- a/variants/generic-e22/target.cpp
+++ b/variants/generic-e22/target.cpp
@@ -36,6 +36,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/heltec_ct62/platformio.ini b/variants/heltec_ct62/platformio.ini
index 910385ec..0179d965 100644
--- a/variants/heltec_ct62/platformio.ini
+++ b/variants/heltec_ct62/platformio.ini
@@ -150,3 +150,8 @@ build_src_filter = ${Heltec_ct62.build_src_filter}
 lib_deps =
   ${Heltec_ct62.lib_deps}
   ${esp32_ota.lib_deps}
+
+[env:Heltec_ct62_kiss_modem]
+extends = Heltec_ct62
+build_src_filter = ${Heltec_ct62.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/heltec_ct62/target.cpp b/variants/heltec_ct62/target.cpp
index 0d5e1b12..cd8bd507 100644
--- a/variants/heltec_ct62/target.cpp
+++ b/variants/heltec_ct62/target.cpp
@@ -25,6 +25,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/heltec_e213/platformio.ini b/variants/heltec_e213/platformio.ini
index 395e22ea..123edd91 100644
--- a/variants/heltec_e213/platformio.ini
+++ b/variants/heltec_e213/platformio.ini
@@ -166,3 +166,8 @@ lib_deps =
   ${Heltec_E213_base.lib_deps}
   ${esp32_ota.lib_deps}
   bakercp/CRC32 @ ^2.0.0
+
+[env:Heltec_E213_kiss_modem]
+extends = Heltec_E213_base
+build_src_filter = ${Heltec_E213_base.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/heltec_e213/target.cpp b/variants/heltec_e213/target.cpp
index 69c832fc..859cd9fa 100644
--- a/variants/heltec_e213/target.cpp
+++ b/variants/heltec_e213/target.cpp
@@ -42,6 +42,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/heltec_e290/platformio.ini b/variants/heltec_e290/platformio.ini
index 475ae868..6e0eaffc 100644
--- a/variants/heltec_e290/platformio.ini
+++ b/variants/heltec_e290/platformio.ini
@@ -162,3 +162,8 @@ lib_deps =
   ${Heltec_E290_base.lib_deps}
   ${esp32_ota.lib_deps}
   bakercp/CRC32 @ ^2.0.0
+
+[env:Heltec_E290_kiss_modem]
+extends = Heltec_E290_base
+build_src_filter = ${Heltec_E290_base.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/heltec_e290/target.cpp b/variants/heltec_e290/target.cpp
index c2220b15..8196ff7d 100644
--- a/variants/heltec_e290/target.cpp
+++ b/variants/heltec_e290/target.cpp
@@ -42,6 +42,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/heltec_mesh_solar/platformio.ini b/variants/heltec_mesh_solar/platformio.ini
index 7bfbac85..92d641a3 100644
--- a/variants/heltec_mesh_solar/platformio.ini
+++ b/variants/heltec_mesh_solar/platformio.ini
@@ -92,4 +92,9 @@ build_src_filter = ${Heltec_mesh_solar.build_src_filter}
   +<../examples/companion_radio/*.cpp>
 lib_deps =
   ${Heltec_mesh_solar.lib_deps}
-  densaugeo/base64 @ ~1.4.0
\ No newline at end of file
+  densaugeo/base64 @ ~1.4.0
+
+[env:Heltec_mesh_solar_kiss_modem]
+extends = Heltec_mesh_solar
+build_src_filter = ${Heltec_mesh_solar.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/heltec_mesh_solar/target.cpp b/variants/heltec_mesh_solar/target.cpp
index 1ea33e1f..08d29e15 100644
--- a/variants/heltec_mesh_solar/target.cpp
+++ b/variants/heltec_mesh_solar/target.cpp
@@ -32,6 +32,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/heltec_t096/LoRaFEMControl.h b/variants/heltec_t096/LoRaFEMControl.h
index fe61b7e4..2c50b742 100644
--- a/variants/heltec_t096/LoRaFEMControl.h
+++ b/variants/heltec_t096/LoRaFEMControl.h
@@ -16,6 +16,6 @@ class LoRaFEMControl
     void setLnaCanControl(bool can_control) { lna_can_control = can_control; }
 
   private:
-    bool lna_enabled = true;
+    bool lna_enabled = false;
     bool lna_can_control = false;
 };
diff --git a/variants/heltec_t096/platformio.ini b/variants/heltec_t096/platformio.ini
index 19b05f3c..14155f5e 100644
--- a/variants/heltec_t096/platformio.ini
+++ b/variants/heltec_t096/platformio.ini
@@ -92,7 +92,7 @@ build_src_filter = ${Heltec_t096.build_src_filter}
 [env:Heltec_t096_room_server]
 extends = Heltec_t096
 build_src_filter = ${Heltec_t096.build_src_filter}
-  +<../examples/simple_room_server> 
+  +<../examples/simple_room_server>
 build_flags =
   ${Heltec_t096.build_flags}
   -D ADVERT_NAME='"Heltec_t096 Room"'
@@ -145,4 +145,9 @@ build_src_filter = ${Heltec_t096.build_src_filter}
   +<../examples/companion_radio/ui-new/*.cpp>
 lib_deps =
   ${Heltec_t096.lib_deps}
-  densaugeo/base64 @ ~1.4.0
\ No newline at end of file
+  densaugeo/base64 @ ~1.4.0
+
+[env:Heltec_t096_kiss_modem]
+extends = Heltec_t096
+build_src_filter = ${Heltec_t096.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/heltec_t114/platformio.ini b/variants/heltec_t114/platformio.ini
index b985030f..135babb1 100644
--- a/variants/heltec_t114/platformio.ini
+++ b/variants/heltec_t114/platformio.ini
@@ -50,7 +50,6 @@ upload_protocol = nrfutil
 extends = Heltec_t114
 build_src_filter = ${Heltec_t114.build_src_filter}
   +<../examples/simple_repeater>
-
 build_flags =
   ${Heltec_t114.build_flags}
   -D ADVERT_NAME='"Heltec_T114 Repeater"'
@@ -127,10 +126,6 @@ build_flags =
   -D DISPLAY_CLASS=NullDisplayDriver
   -D MAX_CONTACTS=350
   -D MAX_GROUP_CHANNELS=40
-;  -D BLE_PIN_CODE=123456
-;  -D BLE_DEBUG_LOGGING=1
-;  -D MESH_PACKET_LOGGING=1
-;  -D MESH_DEBUG=1
 build_src_filter = ${Heltec_t114.build_src_filter}
   +<helpers/nrf52/*.cpp>
   +<../examples/companion_radio/*.cpp>
@@ -251,4 +246,9 @@ build_src_filter = ${Heltec_t114_with_display.build_src_filter}
   +<../examples/companion_radio/ui-new/*.cpp>
 lib_deps =
   ${Heltec_t114_with_display.lib_deps}
-  densaugeo/base64 @ ~1.4.0
\ No newline at end of file
+  densaugeo/base64 @ ~1.4.0
+
+[env:Heltec_t114_kiss_modem]
+extends = Heltec_t114
+build_src_filter = ${Heltec_t114.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/heltec_t114/target.cpp b/variants/heltec_t114/target.cpp
index 6a30a4d1..36587177 100644
--- a/variants/heltec_t114/target.cpp
+++ b/variants/heltec_t114/target.cpp
@@ -52,6 +52,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/heltec_t190/platformio.ini b/variants/heltec_t190/platformio.ini
index 4b034032..411fee85 100644
--- a/variants/heltec_t190/platformio.ini
+++ b/variants/heltec_t190/platformio.ini
@@ -153,3 +153,8 @@ build_src_filter = ${Heltec_T190_base.build_src_filter}
 lib_deps =
   ${Heltec_T190_base.lib_deps}
   ${esp32_ota.lib_deps}
+
+[env:Heltec_T190_kiss_modem]
+extends = Heltec_T190_base
+build_src_filter = ${Heltec_T190_base.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/heltec_t190/target.cpp b/variants/heltec_t190/target.cpp
index d22f8b8c..c39ca35c 100644
--- a/variants/heltec_t190/target.cpp
+++ b/variants/heltec_t190/target.cpp
@@ -42,6 +42,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/heltec_tracker/platformio.ini b/variants/heltec_tracker/platformio.ini
index e0a8f5fa..69293d70 100644
--- a/variants/heltec_tracker/platformio.ini
+++ b/variants/heltec_tracker/platformio.ini
@@ -186,3 +186,8 @@ build_src_filter = ${Heltec_tracker_base.build_src_filter}
 lib_deps =
   ${Heltec_tracker_base.lib_deps}
   ${esp32_ota.lib_deps}
+
+[env:Heltec_Wireless_Tracker_kiss_modem]
+extends = Heltec_tracker_base
+build_src_filter = ${Heltec_tracker_base.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/heltec_tracker/target.cpp b/variants/heltec_tracker/target.cpp
index f801bacb..95cd9c9b 100644
--- a/variants/heltec_tracker/target.cpp
+++ b/variants/heltec_tracker/target.cpp
@@ -46,6 +46,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/heltec_tracker_v2/LoRaFEMControl.h b/variants/heltec_tracker_v2/LoRaFEMControl.h
index fe61b7e4..2c50b742 100644
--- a/variants/heltec_tracker_v2/LoRaFEMControl.h
+++ b/variants/heltec_tracker_v2/LoRaFEMControl.h
@@ -16,6 +16,6 @@ class LoRaFEMControl
     void setLnaCanControl(bool can_control) { lna_can_control = can_control; }
 
   private:
-    bool lna_enabled = true;
+    bool lna_enabled = false;
     bool lna_can_control = false;
 };
diff --git a/variants/heltec_tracker_v2/platformio.ini b/variants/heltec_tracker_v2/platformio.ini
index 956b1ec7..d57c2113 100644
--- a/variants/heltec_tracker_v2/platformio.ini
+++ b/variants/heltec_tracker_v2/platformio.ini
@@ -187,7 +187,7 @@ build_flags =
   -D WIFI_DEBUG_LOGGING=1
   -D WIFI_SSID='"myssid"'
   -D WIFI_PWD='"mypwd"'
-  -D OFFLINE_QUEUE_SIZE=256  
+  -D OFFLINE_QUEUE_SIZE=256
 ;  -D MESH_PACKET_LOGGING=1
 ;  -D MESH_DEBUG=1
 build_src_filter = ${Heltec_tracker_v2.build_src_filter}
@@ -217,3 +217,8 @@ build_src_filter = ${Heltec_tracker_v2.build_src_filter}
 lib_deps =
   ${Heltec_tracker_v2.lib_deps}
   ${esp32_ota.lib_deps}
+
+[env:heltec_tracker_v2_kiss_modem]
+extends = Heltec_tracker_v2
+build_src_filter = ${Heltec_tracker_v2.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/heltec_tracker_v2/target.cpp b/variants/heltec_tracker_v2/target.cpp
index a5aecabe..6de866fb 100644
--- a/variants/heltec_tracker_v2/target.cpp
+++ b/variants/heltec_tracker_v2/target.cpp
@@ -48,6 +48,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/heltec_v2/platformio.ini b/variants/heltec_v2/platformio.ini
index 99f6f7e1..c103dd8d 100644
--- a/variants/heltec_v2/platformio.ini
+++ b/variants/heltec_v2/platformio.ini
@@ -195,3 +195,8 @@ build_src_filter = ${Heltec_lora32_v2.build_src_filter}
 lib_deps =
   ${Heltec_lora32_v2.lib_deps}
   densaugeo/base64 @ ~1.4.0
+
+[env:Heltec_v2_kiss_modem]
+extends = Heltec_lora32_v2
+build_src_filter = ${Heltec_lora32_v2.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/heltec_v2/target.cpp b/variants/heltec_v2/target.cpp
index 2dfb4c6e..d327d78b 100644
--- a/variants/heltec_v2/target.cpp
+++ b/variants/heltec_v2/target.cpp
@@ -41,6 +41,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/heltec_v3/platformio.ini b/variants/heltec_v3/platformio.ini
index 803ee683..a70a93a5 100644
--- a/variants/heltec_v3/platformio.ini
+++ b/variants/heltec_v3/platformio.ini
@@ -371,9 +371,5 @@ lib_deps =
 
 [env:Heltec_v3_kiss_modem]
 extends = Heltec_lora32_v3
-build_flags =
-  ${Heltec_lora32_v3.build_flags}
 build_src_filter = ${Heltec_lora32_v3.build_src_filter}
   +<../examples/kiss_modem/>
-lib_deps =
-  ${Heltec_lora32_v3.lib_deps}
\ No newline at end of file
diff --git a/variants/heltec_v3/target.cpp b/variants/heltec_v3/target.cpp
index 207962f3..56356833 100644
--- a/variants/heltec_v3/target.cpp
+++ b/variants/heltec_v3/target.cpp
@@ -48,6 +48,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/heltec_v4/LoRaFEMControl.h b/variants/heltec_v4/LoRaFEMControl.h
index 75452965..13225bd5 100644
--- a/variants/heltec_v4/LoRaFEMControl.h
+++ b/variants/heltec_v4/LoRaFEMControl.h
@@ -23,7 +23,7 @@ class LoRaFEMControl
     LoRaFEMType getFEMType(void) const { return fem_type; }
   private:
     LoRaFEMType fem_type=OTHER_FEM_TYPES;
-    bool lna_enabled=true;
+    bool lna_enabled=false;
     bool lna_can_control=false;
 };
 
diff --git a/variants/heltec_v4/platformio.ini b/variants/heltec_v4/platformio.ini
index 87632f32..fabf3827 100644
--- a/variants/heltec_v4/platformio.ini
+++ b/variants/heltec_v4/platformio.ini
@@ -429,3 +429,8 @@ build_src_filter = ${heltec_v4_tft.build_src_filter}
 lib_deps =
   ${heltec_v4_tft.lib_deps}
   ${esp32_ota.lib_deps}
+
+[env:heltec_v4_kiss_modem]
+extends = Heltec_lora32_v4
+build_src_filter = ${Heltec_lora32_v4.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/heltec_v4/target.cpp b/variants/heltec_v4/target.cpp
index d9f53596..e0b6a1d4 100644
--- a/variants/heltec_v4/target.cpp
+++ b/variants/heltec_v4/target.cpp
@@ -48,6 +48,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/heltec_wireless_paper/platformio.ini b/variants/heltec_wireless_paper/platformio.ini
index c6fe657d..48723d16 100644
--- a/variants/heltec_wireless_paper/platformio.ini
+++ b/variants/heltec_wireless_paper/platformio.ini
@@ -165,3 +165,8 @@ lib_deps =
   ${Heltec_Wireless_Paper_base.lib_deps}
   ${esp32_ota.lib_deps}
   bakercp/CRC32 @ ^2.0.0
+
+[env:Heltec_Wireless_Paper_kiss_modem]
+extends = Heltec_Wireless_Paper_base
+build_src_filter = ${Heltec_Wireless_Paper_base.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/heltec_wireless_paper/target.cpp b/variants/heltec_wireless_paper/target.cpp
index 83e73332..52ef9fb5 100644
--- a/variants/heltec_wireless_paper/target.cpp
+++ b/variants/heltec_wireless_paper/target.cpp
@@ -41,6 +41,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/ikoka_handheld_nrf/platformio.ini b/variants/ikoka_handheld_nrf/platformio.ini
index 9f48cd41..51b602e4 100644
--- a/variants/ikoka_handheld_nrf/platformio.ini
+++ b/variants/ikoka_handheld_nrf/platformio.ini
@@ -86,8 +86,7 @@ build_src_filter = ${ikoka_handheld_nrf_ssd1306_companion.build_src_filter}
 
 [env:ikoka_handheld_nrf_e22_30dbm_repeater]
 extends = ikoka_handheld_nrf
-build_flags =
-  ${ikoka_handheld_nrf.build_flags}
+build_flags = ${ikoka_handheld_nrf.build_flags}
   -D ADVERT_NAME='"ikoka_handheld Repeater"'
   -D ADVERT_LAT=0.0
   -D ADVERT_LON=0.0
@@ -99,8 +98,7 @@ build_src_filter = ${ikoka_handheld_nrf.build_src_filter}
 
 [env:ikoka_handheld_nrf_e22_30dbm_room_server]
 extends = ikoka_handheld_nrf
-build_flags =
-  ${ikoka_handheld_nrf.build_flags}
+build_flags = ${ikoka_handheld_nrf.build_flags}
   -D ADVERT_NAME='"ikoka_handheld Room"'
   -D ADVERT_LAT=0.0
   -D ADVERT_LON=0.0
@@ -108,3 +106,10 @@ build_flags =
   -D LORA_TX_POWER=20
 build_src_filter = ${ikoka_handheld_nrf.build_src_filter}
   +<../examples/simple_room_server/*.cpp>
+
+[env:ikoka_handheld_nrf_kiss_modem]
+extends = ikoka_handheld_nrf
+build_flags = ${ikoka_handheld_nrf.build_flags}
+  -D LORA_TX_POWER=20
+build_src_filter = ${ikoka_handheld_nrf.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/ikoka_handheld_nrf/target.cpp b/variants/ikoka_handheld_nrf/target.cpp
index f1d00f89..e23fd8d8 100644
--- a/variants/ikoka_handheld_nrf/target.cpp
+++ b/variants/ikoka_handheld_nrf/target.cpp
@@ -34,6 +34,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/ikoka_nano_nrf/platformio.ini b/variants/ikoka_nano_nrf/platformio.ini
index d631174d..e72f83ce 100644
--- a/variants/ikoka_nano_nrf/platformio.ini
+++ b/variants/ikoka_nano_nrf/platformio.ini
@@ -279,3 +279,18 @@ build_flags =
 build_src_filter =
    ${ikoka_nano_nrf_room_server.build_src_filter}
    ${ikoka_nano_nrf_e22_33dbm.build_src_filter}
+
+[env:ikoka_nano_nrf_22dbm_kiss_modem]
+extends = ikoka_nano_nrf_e22_22dbm
+build_src_filter = ${ikoka_nano_nrf_e22_22dbm.build_src_filter}
+  +<../examples/kiss_modem/>
+
+[env:ikoka_nano_nrf_30dbm_kiss_modem]
+extends = ikoka_nano_nrf_e22_30dbm
+build_src_filter = ${ikoka_nano_nrf_e22_30dbm.build_src_filter}
+  +<../examples/kiss_modem/>
+
+[env:ikoka_nano_nrf_33dbm_kiss_modem]
+extends = ikoka_nano_nrf_e22_33dbm
+build_src_filter = ${ikoka_nano_nrf_e22_33dbm.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/ikoka_nano_nrf/target.cpp b/variants/ikoka_nano_nrf/target.cpp
index c66bb23f..00294d5a 100644
--- a/variants/ikoka_nano_nrf/target.cpp
+++ b/variants/ikoka_nano_nrf/target.cpp
@@ -32,6 +32,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/ikoka_stick_nrf/platformio.ini b/variants/ikoka_stick_nrf/platformio.ini
index e95c6375..06e39e84 100644
--- a/variants/ikoka_stick_nrf/platformio.ini
+++ b/variants/ikoka_stick_nrf/platformio.ini
@@ -290,3 +290,18 @@ build_flags =
 build_src_filter =
    ${ikoka_stick_nrf_room_server.build_src_filter}
    ${ikoka_stick_nrf_e22_33dbm.build_src_filter}
+
+[env:ikoka_stick_nrf_22dbm_kiss_modem]
+extends = ikoka_stick_nrf_e22_22dbm
+build_src_filter = ${ikoka_stick_nrf_e22_22dbm.build_src_filter}
+  +<../examples/kiss_modem/>
+
+[env:ikoka_stick_nrf_30dbm_kiss_modem]
+extends = ikoka_stick_nrf_e22_30dbm
+build_src_filter = ${ikoka_stick_nrf_e22_30dbm.build_src_filter}
+  +<../examples/kiss_modem/>
+
+[env:ikoka_stick_nrf_33dbm_kiss_modem]
+extends = ikoka_stick_nrf_e22_33dbm
+build_src_filter = ${ikoka_stick_nrf_e22_33dbm.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/ikoka_stick_nrf/target.cpp b/variants/ikoka_stick_nrf/target.cpp
index d9eab82e..d07dc345 100644
--- a/variants/ikoka_stick_nrf/target.cpp
+++ b/variants/ikoka_stick_nrf/target.cpp
@@ -32,6 +32,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/keepteen_lt1/platformio.ini b/variants/keepteen_lt1/platformio.ini
index b82ceb7e..27cf809e 100644
--- a/variants/keepteen_lt1/platformio.ini
+++ b/variants/keepteen_lt1/platformio.ini
@@ -17,7 +17,7 @@ build_src_filter = ${nrf52_base.build_src_filter}
   +<helpers/sensors>
   +<../variants/keepteen_lt1>
 lib_deps= ${nrf52_base.lib_deps}
-	adafruit/Adafruit SSD1306 @ ^2.5.13
+  adafruit/Adafruit SSD1306 @ ^2.5.13
   stevemarple/MicroNMEA @ ^2.0.6
 
 [env:KeepteenLT1_repeater]
@@ -99,4 +99,9 @@ build_src_filter = ${KeepteenLT1.build_src_filter}
   +<../examples/companion_radio/ui-new/*.cpp>
 lib_deps = ${KeepteenLT1.lib_deps}
   adafruit/RTClib @ ^2.1.3
-  densaugeo/base64 @ ~1.4.0
\ No newline at end of file
+  densaugeo/base64 @ ~1.4.0
+
+[env:KeepteenLT1_kiss_modem]
+extends = KeepteenLT1
+build_src_filter = ${KeepteenLT1.build_src_filter}
+  +<../examples/kiss_modem/>
\ No newline at end of file
diff --git a/variants/keepteen_lt1/target.cpp b/variants/keepteen_lt1/target.cpp
index 762419c3..71652b37 100644
--- a/variants/keepteen_lt1/target.cpp
+++ b/variants/keepteen_lt1/target.cpp
@@ -38,6 +38,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/lilygo_t3s3/platformio.ini b/variants/lilygo_t3s3/platformio.ini
index 1fefcece..54990117 100644
--- a/variants/lilygo_t3s3/platformio.ini
+++ b/variants/lilygo_t3s3/platformio.ini
@@ -173,3 +173,8 @@ build_src_filter = ${LilyGo_T3S3_sx1262.build_src_filter}
 lib_deps =
   ${LilyGo_T3S3_sx1262.lib_deps}
   densaugeo/base64 @ ~1.4.0
+
+[env:LilyGo_T3S3_sx1262_kiss_modem]
+extends = LilyGo_T3S3_sx1262
+build_src_filter = ${LilyGo_T3S3_sx1262.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/lilygo_t3s3/target.cpp b/variants/lilygo_t3s3/target.cpp
index a6a24369..73c19e06 100644
--- a/variants/lilygo_t3s3/target.cpp
+++ b/variants/lilygo_t3s3/target.cpp
@@ -36,6 +36,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/lilygo_t3s3_sx1276/platformio.ini b/variants/lilygo_t3s3_sx1276/platformio.ini
index 5a7ece2c..5df63202 100644
--- a/variants/lilygo_t3s3_sx1276/platformio.ini
+++ b/variants/lilygo_t3s3_sx1276/platformio.ini
@@ -168,4 +168,9 @@ build_src_filter = ${LilyGo_T3S3_sx1276.build_src_filter}
   +<../examples/companion_radio/ui-new/*.cpp>
 lib_deps =
   ${LilyGo_T3S3_sx1276.lib_deps}
-  densaugeo/base64 @ ~1.4.0
\ No newline at end of file
+  densaugeo/base64 @ ~1.4.0
+
+[env:LilyGo_T3S3_sx1276_kiss_modem]
+extends = LilyGo_T3S3_sx1276
+build_src_filter = ${LilyGo_T3S3_sx1276.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/lilygo_t3s3_sx1276/target.cpp b/variants/lilygo_t3s3_sx1276/target.cpp
index e7fe07a0..a62724fb 100644
--- a/variants/lilygo_t3s3_sx1276/target.cpp
+++ b/variants/lilygo_t3s3_sx1276/target.cpp
@@ -42,6 +42,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/lilygo_tbeam_1w/platformio.ini b/variants/lilygo_tbeam_1w/platformio.ini
index 7c845307..c7a59552 100644
--- a/variants/lilygo_tbeam_1w/platformio.ini
+++ b/variants/lilygo_tbeam_1w/platformio.ini
@@ -192,3 +192,8 @@ build_src_filter = ${LilyGo_TBeam_1W.build_src_filter}
 lib_deps =
   ${LilyGo_TBeam_1W.lib_deps}
   ${esp32_ota.lib_deps}
+
+[env:LilyGo_TBeam_1W_kiss_modem]
+extends = LilyGo_TBeam_1W
+build_src_filter = ${LilyGo_TBeam_1W.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/lilygo_tbeam_1w/target.cpp b/variants/lilygo_tbeam_1w/target.cpp
index 17733deb..b6a10257 100644
--- a/variants/lilygo_tbeam_1w/target.cpp
+++ b/variants/lilygo_tbeam_1w/target.cpp
@@ -52,6 +52,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/lilygo_tbeam_SX1262/platformio.ini b/variants/lilygo_tbeam_SX1262/platformio.ini
index d3bc7c99..77b39304 100644
--- a/variants/lilygo_tbeam_SX1262/platformio.ini
+++ b/variants/lilygo_tbeam_SX1262/platformio.ini
@@ -133,3 +133,8 @@ build_src_filter = ${LilyGo_TBeam_SX1262.build_src_filter}
 lib_deps =
   ${LilyGo_TBeam_SX1262.lib_deps}
   ${esp32_ota.lib_deps}
+
+[env:Tbeam_SX1262_kiss_modem]
+extends = LilyGo_TBeam_SX1262
+build_src_filter = ${LilyGo_TBeam_SX1262.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/lilygo_tbeam_SX1262/target.cpp b/variants/lilygo_tbeam_SX1262/target.cpp
index 91a1ed9b..943dcd65 100644
--- a/variants/lilygo_tbeam_SX1262/target.cpp
+++ b/variants/lilygo_tbeam_SX1262/target.cpp
@@ -43,6 +43,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/lilygo_tbeam_SX1276/platformio.ini b/variants/lilygo_tbeam_SX1276/platformio.ini
index 3562c40e..6853a232 100644
--- a/variants/lilygo_tbeam_SX1276/platformio.ini
+++ b/variants/lilygo_tbeam_SX1276/platformio.ini
@@ -131,3 +131,8 @@ build_src_filter = ${LilyGo_TBeam_SX1276.build_src_filter}
 lib_deps =
   ${LilyGo_TBeam_SX1276.lib_deps}
   ${esp32_ota.lib_deps}
+
+[env:Tbeam_SX1276_kiss_modem]
+extends = LilyGo_TBeam_SX1276
+build_src_filter = ${LilyGo_TBeam_SX1276.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/lilygo_tbeam_SX1276/target.cpp b/variants/lilygo_tbeam_SX1276/target.cpp
index 495337b8..b6733a4f 100644
--- a/variants/lilygo_tbeam_SX1276/target.cpp
+++ b/variants/lilygo_tbeam_SX1276/target.cpp
@@ -48,6 +48,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/lilygo_tbeam_supreme_SX1262/platformio.ini b/variants/lilygo_tbeam_supreme_SX1262/platformio.ini
index ffee37a9..845dd415 100644
--- a/variants/lilygo_tbeam_supreme_SX1262/platformio.ini
+++ b/variants/lilygo_tbeam_supreme_SX1262/platformio.ini
@@ -158,3 +158,8 @@ build_src_filter = ${T_Beam_S3_Supreme_SX1262.build_src_filter}
 lib_deps =
   ${T_Beam_S3_Supreme_SX1262.lib_deps}
   densaugeo/base64 @ ~1.4.0
+
+[env:T_Beam_S3_Supreme_SX1262_kiss_modem]
+extends = T_Beam_S3_Supreme_SX1262
+build_src_filter = ${T_Beam_S3_Supreme_SX1262.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/lilygo_tbeam_supreme_SX1262/target.cpp b/variants/lilygo_tbeam_supreme_SX1262/target.cpp
index c2aa5087..bebd4ed0 100644
--- a/variants/lilygo_tbeam_supreme_SX1262/target.cpp
+++ b/variants/lilygo_tbeam_supreme_SX1262/target.cpp
@@ -40,6 +40,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/lilygo_tdeck/platformio.ini b/variants/lilygo_tdeck/platformio.ini
index a8408afa..745d8ff5 100644
--- a/variants/lilygo_tdeck/platformio.ini
+++ b/variants/lilygo_tdeck/platformio.ini
@@ -57,6 +57,7 @@ build_flags =
 build_src_filter = ${esp32_base.build_src_filter}
   +<../variants/lilygo_tdeck>
   +<helpers/sensors/*.cpp>
+  +<helpers/ui/ST7789LCDDisplay.cpp>
 lib_deps =
   ${esp32_base.lib_deps}
   ${sensor_base.lib_deps}
@@ -75,7 +76,6 @@ build_src_filter = ${LilyGo_TDeck.build_src_filter}
   +<helpers/ui/MomentaryButton.cpp>
   +<../examples/companion_radio/*.cpp>
   +<../examples/companion_radio/ui-new/*.cpp>
-  +<helpers/ui/ST7789LCDDisplay.cpp>
 lib_deps =
   ${LilyGo_TDeck.lib_deps}
   densaugeo/base64 @ ~1.4.0
@@ -94,7 +94,6 @@ build_src_filter = ${LilyGo_TDeck.build_src_filter}
   +<helpers/ui/MomentaryButton.cpp>
   +<../examples/companion_radio/*.cpp>
   +<../examples/companion_radio/ui-new/*.cpp>
-  +<helpers/ui/ST7789LCDDisplay.cpp>
 lib_deps =
   ${LilyGo_TDeck.lib_deps}
   densaugeo/base64 @ ~1.4.0
@@ -113,4 +112,9 @@ build_src_filter = ${LilyGo_TDeck.build_src_filter}
   +<helpers/ui/ST7789LCDDisplay.cpp>
 lib_deps =
   ${LilyGo_TDeck.lib_deps}
-  ${esp32_ota.lib_deps}
\ No newline at end of file
+  ${esp32_ota.lib_deps}
+
+[env:LilyGo_TDeck_kiss_modem]
+extends = LilyGo_TDeck
+build_src_filter = ${LilyGo_TDeck.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/lilygo_tdeck/target.cpp b/variants/lilygo_tdeck/target.cpp
index 32586a16..c78d2973 100644
--- a/variants/lilygo_tdeck/target.cpp
+++ b/variants/lilygo_tdeck/target.cpp
@@ -43,6 +43,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/lilygo_techo/platformio.ini b/variants/lilygo_techo/platformio.ini
index e2172b1d..5df77f95 100644
--- a/variants/lilygo_techo/platformio.ini
+++ b/variants/lilygo_techo/platformio.ini
@@ -126,3 +126,8 @@ build_src_filter = ${LilyGo_T-Echo.build_src_filter}
 lib_deps =
   ${LilyGo_T-Echo.lib_deps}
   densaugeo/base64 @ ~1.4.0
+
+[env:LilyGo_T-Echo_kiss_modem]
+extends = LilyGo_T-Echo
+build_src_filter = ${LilyGo_T-Echo.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/lilygo_techo/target.cpp b/variants/lilygo_techo/target.cpp
index 1dfa9164..1807621d 100644
--- a/variants/lilygo_techo/target.cpp
+++ b/variants/lilygo_techo/target.cpp
@@ -40,6 +40,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/lilygo_techo_lite/platformio.ini b/variants/lilygo_techo_lite/platformio.ini
index 88616858..d3408f95 100644
--- a/variants/lilygo_techo_lite/platformio.ini
+++ b/variants/lilygo_techo_lite/platformio.ini
@@ -140,3 +140,8 @@ build_src_filter = ${nrf52_base.build_src_filter}
 lib_deps =
   ${LilyGo_T-Echo-Lite.lib_deps}
   densaugeo/base64 @ ~1.4.0
+
+[env:LilyGo_T-Echo-Lite_kiss_modem]
+extends = LilyGo_T-Echo-Lite
+build_src_filter = ${LilyGo_T-Echo-Lite.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/lilygo_techo_lite/target.cpp b/variants/lilygo_techo_lite/target.cpp
index dbb61b19..7a602c6f 100644
--- a/variants/lilygo_techo_lite/target.cpp
+++ b/variants/lilygo_techo_lite/target.cpp
@@ -39,6 +39,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/lilygo_tlora_c6/platformio.ini b/variants/lilygo_tlora_c6/platformio.ini
index b06a0b7c..3acfa761 100644
--- a/variants/lilygo_tlora_c6/platformio.ini
+++ b/variants/lilygo_tlora_c6/platformio.ini
@@ -84,3 +84,8 @@ build_src_filter = ${tlora_c6.build_src_filter}
 lib_deps =
   ${tlora_c6.lib_deps}
   densaugeo/base64 @ ~1.4.0
+
+[env:LilyGo_Tlora_C6_kiss_modem]
+extends = tlora_c6
+build_src_filter = ${tlora_c6.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/lilygo_tlora_c6/target.cpp b/variants/lilygo_tlora_c6/target.cpp
index a73c1c99..1f6cf9c3 100644
--- a/variants/lilygo_tlora_c6/target.cpp
+++ b/variants/lilygo_tlora_c6/target.cpp
@@ -36,6 +36,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/lilygo_tlora_v2_1/platformio.ini b/variants/lilygo_tlora_v2_1/platformio.ini
index 3641f127..f710d070 100644
--- a/variants/lilygo_tlora_v2_1/platformio.ini
+++ b/variants/lilygo_tlora_v2_1/platformio.ini
@@ -192,3 +192,8 @@ build_flags =
 lib_deps =
   ${LilyGo_TLora_V2_1_1_6.lib_deps}
   ${esp32_ota.lib_deps}
+
+[env:LilyGo_TLora_V2_1_1_6_kiss_modem]
+extends = LilyGo_TLora_V2_1_1_6
+build_src_filter = ${LilyGo_TLora_V2_1_1_6.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/lilygo_tlora_v2_1/target.cpp b/variants/lilygo_tlora_v2_1/target.cpp
index a82c1339..81b1d74c 100644
--- a/variants/lilygo_tlora_v2_1/target.cpp
+++ b/variants/lilygo_tlora_v2_1/target.cpp
@@ -37,6 +37,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/m5stack_unit_c6l/UnitC6LBoard.cpp b/variants/m5stack_unit_c6l/UnitC6LBoard.cpp
index 08c76660..5a70e979 100644
--- a/variants/m5stack_unit_c6l/UnitC6LBoard.cpp
+++ b/variants/m5stack_unit_c6l/UnitC6LBoard.cpp
@@ -37,6 +37,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(uint8_t dbm) {
diff --git a/variants/m5stack_unit_c6l/platformio.ini b/variants/m5stack_unit_c6l/platformio.ini
index 84c6562a..94083eb4 100644
--- a/variants/m5stack_unit_c6l/platformio.ini
+++ b/variants/m5stack_unit_c6l/platformio.ini
@@ -105,3 +105,8 @@ lib_deps =
   ${M5Stack_Unit_C6L.lib_deps}
   densaugeo/base64 @ ~1.4.0
   end2endzone/NonBlockingRTTTL@^1.3.0
+
+[env:M5Stack_Unit_C6L_kiss_modem]
+extends = M5Stack_Unit_C6L
+build_src_filter = ${M5Stack_Unit_C6L.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/mesh_pocket/platformio.ini b/variants/mesh_pocket/platformio.ini
index 015c2ca4..52a0d835 100644
--- a/variants/mesh_pocket/platformio.ini
+++ b/variants/mesh_pocket/platformio.ini
@@ -109,4 +109,9 @@ build_src_filter = ${Mesh_pocket.build_src_filter}
   +<../examples/companion_radio/ui-new/*.cpp>
 lib_deps =
   ${Mesh_pocket.lib_deps}
-  densaugeo/base64 @ ~1.4.0
\ No newline at end of file
+  densaugeo/base64 @ ~1.4.0
+
+[env:Mesh_pocket_kiss_modem]
+extends = Mesh_pocket
+build_src_filter = ${Mesh_pocket.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/mesh_pocket/target.cpp b/variants/mesh_pocket/target.cpp
index 3ca71463..22f14e79 100644
--- a/variants/mesh_pocket/target.cpp
+++ b/variants/mesh_pocket/target.cpp
@@ -32,6 +32,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/meshadventurer/platformio.ini b/variants/meshadventurer/platformio.ini
index 18b64ac3..2006a180 100644
--- a/variants/meshadventurer/platformio.ini
+++ b/variants/meshadventurer/platformio.ini
@@ -29,6 +29,7 @@ build_flags =
 build_src_filter = ${esp32_base.build_src_filter}
   +<../variants/meshadventurer>
   +<helpers/ui/MomentaryButton.cpp>
+  +<helpers/ui/SSD1306Display.cpp>
 lib_deps =
   ${esp32_base.lib_deps}
   stevemarple/MicroNMEA @ ^2.0.6
@@ -38,7 +39,6 @@ lib_deps =
 extends = Meshadventurer
 build_src_filter = ${Meshadventurer.build_src_filter}
   +<../examples/simple_repeater>
-  +<helpers/ui/SSD1306Display.cpp>
 build_flags =
   ${Meshadventurer.build_flags}
   -D RADIO_CLASS=CustomSX1262
@@ -60,7 +60,6 @@ lib_deps =
 ; build_src_filter = ${Meshadventurer.build_src_filter}
 ;   +<helpers/bridges/RS232Bridge.cpp>
 ;   +<../examples/simple_repeater>
-;   +<helpers/ui/SSD1306Display.cpp>
 ; build_flags =
 ;   ${Meshadventurer.build_flags}
 ;   -D RADIO_CLASS=CustomSX1262
@@ -86,7 +85,6 @@ extends = Meshadventurer
 build_src_filter = ${Meshadventurer.build_src_filter}
   +<helpers/bridges/ESPNowBridge.cpp>
   +<../examples/simple_repeater>
-  +<helpers/ui/SSD1306Display.cpp>
 build_flags =
   ${Meshadventurer.build_flags}
   -D RADIO_CLASS=CustomSX1262
@@ -109,7 +107,6 @@ lib_deps =
 extends = Meshadventurer
 build_src_filter = ${Meshadventurer.build_src_filter}
   +<../examples/simple_repeater>
-  +<helpers/ui/SSD1306Display.cpp>
 build_flags =
   ${Meshadventurer.build_flags}
   -D RADIO_CLASS=CustomSX1268
@@ -157,7 +154,6 @@ extends = Meshadventurer
 build_src_filter = ${Meshadventurer.build_src_filter}
   +<helpers/bridges/ESPNowBridge.cpp>
   +<../examples/simple_repeater>
-  +<helpers/ui/SSD1306Display.cpp>
 build_flags =
   ${Meshadventurer.build_flags}
   -D RADIO_CLASS=CustomSX1268
@@ -179,8 +175,6 @@ lib_deps =
 [env:Meshadventurer_sx1262_companion_radio_usb]
 extends = Meshadventurer
 build_src_filter = ${Meshadventurer.build_src_filter}
-  +<../examples/companion_radio/*.cpp>
-  +<helpers/ui/SSD1306Display.cpp>
   +<../examples/companion_radio/*.cpp>
   +<../examples/companion_radio/ui-new/*.cpp>
 build_flags =
@@ -200,9 +194,7 @@ lib_deps =
 [env:Meshadventurer_sx1262_companion_radio_ble]
 extends = Meshadventurer
 build_src_filter = ${Meshadventurer.build_src_filter}
-  +<../examples/companion_radio/*.cpp>
   +<helpers/esp32/*.cpp>
-  +<helpers/ui/SSD1306Display.cpp>
   +<../examples/companion_radio/*.cpp>
   +<../examples/companion_radio/ui-new/*.cpp>
 build_flags =
@@ -235,7 +227,6 @@ build_flags =
 ;  -D MESH_DEBUG=1
 build_src_filter = ${Meshadventurer.build_src_filter}
   +<../examples/simple_secure_chat/main.cpp>
-  +<helpers/ui/SSD1306Display.cpp>
 lib_deps =
   ${Meshadventurer.lib_deps}
   densaugeo/base64 @ ~1.4.0
@@ -256,7 +247,6 @@ build_flags =
 ;  -D MESH_DEBUG=1
 build_src_filter = ${Meshadventurer.build_src_filter}
   +<../examples/simple_room_server>
-  +<helpers/ui/SSD1306Display.cpp>
 lib_deps =
   ${Meshadventurer.lib_deps}
   ${esp32_ota.lib_deps}
@@ -264,8 +254,6 @@ lib_deps =
 [env:Meshadventurer_sx1268_companion_radio_usb]
 extends = Meshadventurer
 build_src_filter = ${Meshadventurer.build_src_filter}
-  +<../examples/companion_radio/*.cpp>
-  +<helpers/ui/SSD1306Display.cpp>
   +<../examples/companion_radio/*.cpp>
   +<../examples/companion_radio/ui-new/*.cpp>
 build_flags =
@@ -285,9 +273,7 @@ lib_deps =
 [env:Meshadventurer_sx1268_companion_radio_ble]
 extends = Meshadventurer
 build_src_filter = ${Meshadventurer.build_src_filter}
-  +<../examples/companion_radio/*.cpp>
   +<helpers/esp32/*.cpp>
-  +<helpers/ui/SSD1306Display.cpp>
   +<../examples/companion_radio/*.cpp>
   +<../examples/companion_radio/ui-new/*.cpp>
 build_flags =
@@ -320,7 +306,6 @@ build_flags =
 ;  -D MESH_DEBUG=1
 build_src_filter = ${Meshadventurer.build_src_filter}
   +<../examples/simple_secure_chat/main.cpp>
-  +<helpers/ui/SSD1306Display.cpp>
 lib_deps =
   ${Meshadventurer.lib_deps}
   densaugeo/base64 @ ~1.4.0
@@ -341,7 +326,24 @@ build_flags =
 ;  -D MESH_DEBUG=1
 build_src_filter = ${Meshadventurer.build_src_filter}
   +<../examples/simple_room_server>
-  +<helpers/ui/SSD1306Display.cpp>
 lib_deps =
   ${Meshadventurer.lib_deps}
-  ${esp32_ota.lib_deps}
\ No newline at end of file
+  ${esp32_ota.lib_deps}
+
+[env:Meshadventurer_sx1262_kiss_modem]
+extends = Meshadventurer
+build_src_filter = ${Meshadventurer.build_src_filter}
+  +<../examples/kiss_modem/>
+build_flags = ${Meshadventurer.build_flags}
+  -D RADIO_CLASS=CustomSX1262
+  -D WRAPPER_CLASS=CustomSX1262Wrapper
+  -D LORA_TX_POWER=22
+
+[env:Meshadventurer_sx1268_kiss_modem]
+extends = Meshadventurer
+build_src_filter = ${Meshadventurer.build_src_filter}
+  +<../examples/kiss_modem/>
+build_flags = ${Meshadventurer.build_flags}
+  -D RADIO_CLASS=CustomSX1268
+  -D WRAPPER_CLASS=CustomSX1268Wrapper
+  -D LORA_TX_POWER=22
diff --git a/variants/meshadventurer/target.cpp b/variants/meshadventurer/target.cpp
index c79b0a6e..d8ccbe2f 100644
--- a/variants/meshadventurer/target.cpp
+++ b/variants/meshadventurer/target.cpp
@@ -39,6 +39,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/meshtiny/platformio.ini b/variants/meshtiny/platformio.ini
index 0d5de517..c5439c88 100644
--- a/variants/meshtiny/platformio.ini
+++ b/variants/meshtiny/platformio.ini
@@ -67,3 +67,8 @@ build_src_filter = ${Meshtiny.build_src_filter}
 lib_deps =
   ${Meshtiny.lib_deps}
   densaugeo/base64 @ ~1.4.0
+
+[env:Meshtiny_kiss_modem]
+extends = Meshtiny
+build_src_filter = ${Meshtiny.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/meshtiny/target.cpp b/variants/meshtiny/target.cpp
index 953c8b3f..c0f1b1fa 100644
--- a/variants/meshtiny/target.cpp
+++ b/variants/meshtiny/target.cpp
@@ -35,6 +35,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/minewsemi_me25ls01/platformio.ini b/variants/minewsemi_me25ls01/platformio.ini
index 91e62243..39d4252d 100644
--- a/variants/minewsemi_me25ls01/platformio.ini
+++ b/variants/minewsemi_me25ls01/platformio.ini
@@ -145,3 +145,7 @@ build_src_filter = ${me25ls01.build_src_filter}
   +<../examples/companion_radio/*.cpp>
   +<../examples/companion_radio/ui-orig/*.cpp>
 
+[env:Minewsemi_me25ls01_kiss_modem]
+extends = me25ls01
+build_src_filter = ${me25ls01.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/minewsemi_me25ls01/target.cpp b/variants/minewsemi_me25ls01/target.cpp
index fcec1941..c67663d6 100644
--- a/variants/minewsemi_me25ls01/target.cpp
+++ b/variants/minewsemi_me25ls01/target.cpp
@@ -86,6 +86,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/muziworks_r1_neo/platformio.ini b/variants/muziworks_r1_neo/platformio.ini
index 39ef8728..3dbecf1e 100644
--- a/variants/muziworks_r1_neo/platformio.ini
+++ b/variants/muziworks_r1_neo/platformio.ini
@@ -130,3 +130,8 @@ build_flags =
   -D MESH_DEBUG=1
 build_src_filter = ${R1Neo.build_src_filter}
   +<../examples/simple_sensor>
+
+[env:R1Neo_kiss_modem]
+extends = R1Neo
+build_src_filter = ${R1Neo.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/nano_g2_ultra/platformio.ini b/variants/nano_g2_ultra/platformio.ini
index 116a1f25..3cdc29ff 100644
--- a/variants/nano_g2_ultra/platformio.ini
+++ b/variants/nano_g2_ultra/platformio.ini
@@ -1,20 +1,11 @@
-[nrf52840_g2_ultra]
+[Nano_G2_Ultra]
 extends = nrf52_base
-platform_packages = framework-arduinoadafruitnrf52
+board = nano-g2-ultra
+board_build.ldscript = boards/nrf52840_s140_v6.ld
 build_flags = ${nrf52_base.build_flags}
   -I src/helpers/nrf52
   -I lib/nrf52/s140_nrf52_6.1.1_API/include
   -I lib/nrf52/s140_nrf52_6.1.1_API/include/nrf52
-lib_deps =
-  ${nrf52_base.lib_deps}
-  rweather/Crypto @ ^0.4.0
-  lewisxhe/PCF8563_Library@^1.0.1
-
-[Nano_G2_Ultra]
-extends = nrf52840_g2_ultra
-board = nano-g2-ultra
-board_build.ldscript = boards/nrf52840_s140_v6.ld
-build_flags = ${nrf52840_g2_ultra.build_flags}
   -I variants/nano_g2_ultra
   -D NANO_G2_ULTRA
   -D RADIO_CLASS=CustomSX1262
@@ -23,11 +14,47 @@ build_flags = ${nrf52840_g2_ultra.build_flags}
   -D SX126X_CURRENT_LIMIT=140
   -D SX126X_RX_BOOSTED_GAIN=1
   -D PIN_USER_BTN=38
-build_src_filter = ${nrf52840_g2_ultra.build_src_filter}
+build_src_filter = ${nrf52_base.build_src_filter}
   +<helpers/*.cpp>
   +<../variants/nano_g2_ultra>
 debug_tool = jlink
 upload_protocol = nrfutil
+lib_deps = ${nrf52_base.lib_deps}
+  adafruit/Adafruit SH110X @ ~2.1.13
+  adafruit/Adafruit GFX Library @ ^1.12.1
+  stevemarple/MicroNMEA @ ^2.0.6
+
+[env:Nano_G2_Ultra_repeater]
+extends = Nano_G2_Ultra
+build_flags =
+  ${Nano_G2_Ultra.build_flags}
+  -D DISPLAY_CLASS=SH1106Display
+  -D ADVERT_NAME='"Nano G2 Repeater"'
+  -D ADVERT_LAT=0.0
+  -D ADVERT_LON=0.0
+  -D ADMIN_PASSWORD='"password"'
+  -D MAX_NEIGHBOURS=50
+;  -D MESH_PACKET_LOGGING=1
+;  -D MESH_DEBUG=1
+build_src_filter = ${Nano_G2_Ultra.build_src_filter}
+  +<helpers/ui/SH1106Display.cpp>
+  +<../examples/simple_repeater>
+
+[env:Nano_G2_Ultra_room_server]
+extends = Nano_G2_Ultra
+build_flags =
+  ${Nano_G2_Ultra.build_flags}
+  -D DISPLAY_CLASS=SH1106Display
+  -D ADVERT_NAME='"Nano G2 Room"'
+  -D ADVERT_LAT=0.0
+  -D ADVERT_LON=0.0
+  -D ADMIN_PASSWORD='"password"'
+  -D ROOM_PASSWORD='"hello"'
+;  -D MESH_PACKET_LOGGING=1
+;  -D MESH_DEBUG=1
+build_src_filter = ${Nano_G2_Ultra.build_src_filter}
+  +<helpers/ui/SH1106Display.cpp>
+  +<../examples/simple_room_server>
 
 [env:Nano_G2_Ultra_companion_radio_ble]
 extends = Nano_G2_Ultra
@@ -54,12 +81,8 @@ build_src_filter = ${Nano_G2_Ultra.build_src_filter}
   +<helpers/ui/MomentaryButton.cpp>
   +<../examples/companion_radio/*.cpp>
   +<../examples/companion_radio/ui-new/*.cpp>
-lib_deps =
-  ${Nano_G2_Ultra.lib_deps}
+lib_deps = ${Nano_G2_Ultra.lib_deps}
   densaugeo/base64 @ ~1.4.0
-  adafruit/Adafruit SH110X @ ~2.1.13
-  adafruit/Adafruit GFX Library @ ^1.12.1
-  stevemarple/MicroNMEA @ ^2.0.6
   end2endzone/NonBlockingRTTTL@^1.3.0
 
 [env:Nano_G2_Ultra_companion_radio_usb]
@@ -84,10 +107,11 @@ build_src_filter = ${Nano_G2_Ultra.build_src_filter}
   +<helpers/ui/MomentaryButton.cpp>
   +<../examples/companion_radio/*.cpp>
   +<../examples/companion_radio/ui-new/*.cpp>
-lib_deps =
-  ${Nano_G2_Ultra.lib_deps}
+lib_deps = ${Nano_G2_Ultra.lib_deps}
   densaugeo/base64 @ ~1.4.0
-  adafruit/Adafruit SH110X @ ~2.1.13
-  adafruit/Adafruit GFX Library @ ^1.12.1
-  stevemarple/MicroNMEA @ ^2.0.6
   end2endzone/NonBlockingRTTTL@^1.3.0
+
+[env:Nano_G2_Ultra_kiss_modem]
+extends = Nano_G2_Ultra
+build_src_filter = ${Nano_G2_Ultra.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/nano_g2_ultra/target.cpp b/variants/nano_g2_ultra/target.cpp
index 56245ea5..c5e7ebdf 100644
--- a/variants/nano_g2_ultra/target.cpp
+++ b/variants/nano_g2_ultra/target.cpp
@@ -34,6 +34,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/nibble_screen_connect/platformio.ini b/variants/nibble_screen_connect/platformio.ini
index 8a4e63ca..a496a2fe 100644
--- a/variants/nibble_screen_connect/platformio.ini
+++ b/variants/nibble_screen_connect/platformio.ini
@@ -159,3 +159,8 @@ lib_deps =
   ${nibble_screen_connect_base.lib_deps}
   densaugeo/base64 @ ~1.4.0
 
+
+[env:nibble_screen_connect_kiss_modem]
+extends = nibble_screen_connect_base
+build_src_filter = ${nibble_screen_connect_base.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/nibble_screen_connect/target.cpp b/variants/nibble_screen_connect/target.cpp
index 5aadd8b2..248a788b 100644
--- a/variants/nibble_screen_connect/target.cpp
+++ b/variants/nibble_screen_connect/target.cpp
@@ -36,6 +36,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/promicro/platformio.ini b/variants/promicro/platformio.ini
index 317537a9..5415e158 100644
--- a/variants/promicro/platformio.ini
+++ b/variants/promicro/platformio.ini
@@ -27,7 +27,7 @@ build_src_filter = ${nrf52_base.build_src_filter}
   +<helpers/sensors>
   +<../variants/promicro>
 lib_deps= ${nrf52_base.lib_deps}
-	adafruit/Adafruit SSD1306 @ ^2.5.13
+  adafruit/Adafruit SSD1306 @ ^2.5.13
   adafruit/Adafruit INA3221 Library @ ^1.0.1
   adafruit/Adafruit INA219 @ ^1.2.3
   adafruit/Adafruit AHTX0 @ ^2.0.5
@@ -171,3 +171,8 @@ build_src_filter = ${Promicro.build_src_filter}
   +<../examples/simple_sensor>
 lib_deps =
   ${Promicro.lib_deps}
+
+[env:ProMicro_kiss_modem]
+extends = Promicro
+build_src_filter = ${Promicro.build_src_filter}
+  +<../examples/kiss_modem/>
\ No newline at end of file
diff --git a/variants/promicro/target.cpp b/variants/promicro/target.cpp
index 66c9031a..ddcc2a53 100644
--- a/variants/promicro/target.cpp
+++ b/variants/promicro/target.cpp
@@ -38,6 +38,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/rak11310/platformio.ini b/variants/rak11310/platformio.ini
index d5537627..3019f9c5 100644
--- a/variants/rak11310/platformio.ini
+++ b/variants/rak11310/platformio.ini
@@ -132,3 +132,8 @@ build_src_filter = ${rak11310.build_src_filter}
   +<../examples/simple_secure_chat/main.cpp>
 lib_deps = ${rak11310.lib_deps}
   densaugeo/base64 @ ~1.4.0
+
+[env:RAK_11310_kiss_modem]
+extends = rak11310
+build_src_filter = ${rak11310.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/rak11310/target.cpp b/variants/rak11310/target.cpp
index 3441a316..c66a2e44 100644
--- a/variants/rak11310/target.cpp
+++ b/variants/rak11310/target.cpp
@@ -27,6 +27,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/rak3112/platformio.ini b/variants/rak3112/platformio.ini
index b4165bb2..9cd32c4b 100644
--- a/variants/rak3112/platformio.ini
+++ b/variants/rak3112/platformio.ini
@@ -204,3 +204,8 @@ build_src_filter = ${rak3112.build_src_filter}
 lib_deps =
   ${rak3112.lib_deps}
   ${esp32_ota.lib_deps}
+
+[env:RAK_3112_kiss_modem]
+extends = rak3112
+build_src_filter = ${rak3112.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/rak3112/target.cpp b/variants/rak3112/target.cpp
index a4098601..23be3ef8 100644
--- a/variants/rak3112/target.cpp
+++ b/variants/rak3112/target.cpp
@@ -48,6 +48,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/rak3401/platformio.ini b/variants/rak3401/platformio.ini
index 3d2d4a3e..7de3f176 100644
--- a/variants/rak3401/platformio.ini
+++ b/variants/rak3401/platformio.ini
@@ -6,6 +6,7 @@ build_flags = ${nrf52_base.build_flags}
   ${sensor_base.build_flags}
   -I variants/rak3401
   -D RAK_3401
+  -D RAK_BOARD
   -D NRF52_POWER_MANAGEMENT
   -D RADIO_CLASS=CustomSX1262
   -D WRAPPER_CLASS=CustomSX1262Wrapper
@@ -63,6 +64,8 @@ board_upload.maximum_size = 712704
 build_flags =
   ${rak3401.build_flags}
   -I examples/companion_radio/ui-new
+  -D PIN_USER_BTN_ANA=31
+  -D PIN_GPS_EN=-1
   -D DISPLAY_CLASS=SSD1306Display
   -D MAX_CONTACTS=350
   -D MAX_GROUP_CHANNELS=40
@@ -82,6 +85,8 @@ board_upload.maximum_size = 712704
 build_flags =
   ${rak3401.build_flags}
   -I examples/companion_radio/ui-new
+  -D PIN_USER_BTN_ANA=31
+  -D PIN_GPS_EN=-1
   -D DISPLAY_CLASS=SSD1306Display
   -D MAX_CONTACTS=350
   -D MAX_GROUP_CHANNELS=40
@@ -126,3 +131,8 @@ build_flags =
 build_src_filter = ${rak3401.build_src_filter}
   +<helpers/ui/SSD1306Display.cpp>
   +<../examples/simple_sensor>
+
+[env:RAK_3401_kiss_modem]
+extends = rak3401
+build_src_filter = ${rak3401.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/rak3401/target.cpp b/variants/rak3401/target.cpp
index cf7d08ad..b9cb1ecc 100644
--- a/variants/rak3401/target.cpp
+++ b/variants/rak3401/target.cpp
@@ -46,6 +46,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/rak3x72/platformio.ini b/variants/rak3x72/platformio.ini
index 12ea413a..f9667860 100644
--- a/variants/rak3x72/platformio.ini
+++ b/variants/rak3x72/platformio.ini
@@ -41,3 +41,8 @@ build_src_filter = ${rak3x72.build_src_filter}
   +<../examples/companion_radio/*.cpp>
 lib_deps = ${rak3x72.lib_deps}
   densaugeo/base64 @ ~1.4.0
+
+[env:RAK_3x72_kiss_modem]
+extends = rak3x72
+build_src_filter = ${rak3x72.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/rak3x72/target.cpp b/variants/rak3x72/target.cpp
index 48e7f422..161c0145 100644
--- a/variants/rak3x72/target.cpp
+++ b/variants/rak3x72/target.cpp
@@ -64,6 +64,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/rak4631/target.cpp b/variants/rak4631/target.cpp
index 016e3982..d2377c12 100644
--- a/variants/rak4631/target.cpp
+++ b/variants/rak4631/target.cpp
@@ -46,6 +46,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/rak_wismesh_tag/platformio.ini b/variants/rak_wismesh_tag/platformio.ini
index 081cb0d0..29124daf 100644
--- a/variants/rak_wismesh_tag/platformio.ini
+++ b/variants/rak_wismesh_tag/platformio.ini
@@ -118,4 +118,9 @@ build_flags =
 ;  -D MESH_PACKET_LOGGING=1
   -D MESH_DEBUG=1
 build_src_filter = ${rak4631.build_src_filter}
-  +<../examples/simple_sensor>
\ No newline at end of file
+  +<../examples/simple_sensor>
+
+[env:RAK_WisMesh_Tag_kiss_modem]
+extends = rak_wismesh_tag
+build_src_filter = ${rak_wismesh_tag.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/rak_wismesh_tag/target.cpp b/variants/rak_wismesh_tag/target.cpp
index 7aa20c1d..e52a12b2 100644
--- a/variants/rak_wismesh_tag/target.cpp
+++ b/variants/rak_wismesh_tag/target.cpp
@@ -42,6 +42,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/rpi_picow/platformio.ini b/variants/rpi_picow/platformio.ini
index 2d261b25..9253d36f 100644
--- a/variants/rpi_picow/platformio.ini
+++ b/variants/rpi_picow/platformio.ini
@@ -106,3 +106,8 @@ build_src_filter = ${rpi_picow.build_src_filter}
   +<../examples/simple_secure_chat/main.cpp>
 lib_deps = ${rpi_picow.lib_deps}
   densaugeo/base64 @ ~1.4.0
+
+[env:PicoW_kiss_modem]
+extends = rpi_picow
+build_src_filter = ${rpi_picow.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/rpi_picow/target.cpp b/variants/rpi_picow/target.cpp
index 1166dc46..568987ba 100644
--- a/variants/rpi_picow/target.cpp
+++ b/variants/rpi_picow/target.cpp
@@ -27,6 +27,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/sensecap_solar/target.cpp b/variants/sensecap_solar/target.cpp
index ff706a94..8b506cc6 100644
--- a/variants/sensecap_solar/target.cpp
+++ b/variants/sensecap_solar/target.cpp
@@ -34,6 +34,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/station_g2/platformio.ini b/variants/station_g2/platformio.ini
index 87e77152..6432b523 100644
--- a/variants/station_g2/platformio.ini
+++ b/variants/station_g2/platformio.ini
@@ -238,3 +238,8 @@ build_src_filter = ${Station_G2.build_src_filter}
 lib_deps =
   ${Station_G2.lib_deps}
   densaugeo/base64 @ ~1.4.0
+
+[env:Station_G2_kiss_modem]
+extends = Station_G2
+build_src_filter = ${Station_G2.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/station_g2/target.cpp b/variants/station_g2/target.cpp
index 40fa8005..65cc388d 100644
--- a/variants/station_g2/target.cpp
+++ b/variants/station_g2/target.cpp
@@ -49,6 +49,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/t1000-e/platformio.ini b/variants/t1000-e/platformio.ini
index 429390c4..fb88e334 100644
--- a/variants/t1000-e/platformio.ini
+++ b/variants/t1000-e/platformio.ini
@@ -117,3 +117,10 @@ lib_deps = ${t1000-e.lib_deps}
   densaugeo/base64 @ ~1.4.0
   stevemarple/MicroNMEA @ ^2.0.6
   end2endzone/NonBlockingRTTTL@^1.3.0
+
+[env:t1000e_kiss_modem]
+extends = t1000-e
+build_src_filter = ${t1000-e.build_src_filter}
+  +<../examples/kiss_modem/>
+lib_deps = ${t1000-e.lib_deps}
+  stevemarple/MicroNMEA @ ^2.0.6
diff --git a/variants/t1000-e/target.cpp b/variants/t1000-e/target.cpp
index da8fa48b..bbf453ca 100644
--- a/variants/t1000-e/target.cpp
+++ b/variants/t1000-e/target.cpp
@@ -83,6 +83,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/tenstar_c3/platformio.ini b/variants/tenstar_c3/platformio.ini
index 183a5684..e7988823 100644
--- a/variants/tenstar_c3/platformio.ini
+++ b/variants/tenstar_c3/platformio.ini
@@ -161,3 +161,23 @@ build_flags =
 lib_deps =
   ${Tenstar_esp32_C3.lib_deps}
   ${esp32_ota.lib_deps}
+
+[env:Tenstar_C3_sx1262_kiss_modem]
+extends = Tenstar_esp32_C3
+build_src_filter = ${Tenstar_esp32_C3.build_src_filter}
+  +<../examples/kiss_modem/>
+build_flags =
+  ${Tenstar_esp32_C3.build_flags}
+  -D RADIO_CLASS=CustomSX1262
+  -D WRAPPER_CLASS=CustomSX1262Wrapper
+  -D LORA_TX_POWER=22
+
+[env:Tenstar_C3_sx1268_kiss_modem]
+extends = Tenstar_esp32_C3
+build_src_filter = ${Tenstar_esp32_C3.build_src_filter}
+  +<../examples/kiss_modem/>
+build_flags =
+  ${Tenstar_esp32_C3.build_flags}
+  -D RADIO_CLASS=CustomSX1268
+  -D WRAPPER_CLASS=CustomSX1268Wrapper
+  -D LORA_TX_POWER=22
diff --git a/variants/tenstar_c3/target.cpp b/variants/tenstar_c3/target.cpp
index 8a0f3f07..7a1794e6 100644
--- a/variants/tenstar_c3/target.cpp
+++ b/variants/tenstar_c3/target.cpp
@@ -36,6 +36,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/thinknode_m1/platformio.ini b/variants/thinknode_m1/platformio.ini
index 397bf8e3..356edfee 100644
--- a/variants/thinknode_m1/platformio.ini
+++ b/variants/thinknode_m1/platformio.ini
@@ -127,4 +127,9 @@ lib_deps =
   densaugeo/base64 @ ~1.4.0
   zinggjm/GxEPD2 @ 1.6.2
   bakercp/CRC32 @ ^2.0.0
-  end2endzone/NonBlockingRTTTL@^1.3.0
\ No newline at end of file
+  end2endzone/NonBlockingRTTTL@^1.3.0
+
+[env:ThinkNode_M1_kiss_modem]
+extends = ThinkNode_M1
+build_src_filter = ${ThinkNode_M1.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/thinknode_m1/target.cpp b/variants/thinknode_m1/target.cpp
index b2e16283..934040e1 100644
--- a/variants/thinknode_m1/target.cpp
+++ b/variants/thinknode_m1/target.cpp
@@ -33,6 +33,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/thinknode_m2/platformio.ini b/variants/thinknode_m2/platformio.ini
index a765d9c7..99015501 100644
--- a/variants/thinknode_m2/platformio.ini
+++ b/variants/thinknode_m2/platformio.ini
@@ -209,3 +209,10 @@ build_src_filter = ${ThinkNode_M2.build_src_filter}
 lib_deps =
   ${ThinkNode_M2.lib_deps}
   densaugeo/base64 @ ~1.4.0
+
+[env:ThinkNode_M2_kiss_modem]
+extends = ThinkNode_M2
+build_flags = ${ThinkNode_M2.build_flags}
+  -UPIN_BUZZER
+build_src_filter = ${ThinkNode_M2.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/thinknode_m2/target.cpp b/variants/thinknode_m2/target.cpp
index 52afba9c..a8919034 100644
--- a/variants/thinknode_m2/target.cpp
+++ b/variants/thinknode_m2/target.cpp
@@ -44,6 +44,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/thinknode_m3/platformio.ini b/variants/thinknode_m3/platformio.ini
index 88fd487a..0a3d4eda 100644
--- a/variants/thinknode_m3/platformio.ini
+++ b/variants/thinknode_m3/platformio.ini
@@ -17,11 +17,11 @@ build_flags = ${nrf52_base.build_flags}
   -D RF_SWITCH_TABLE
   -D RX_BOOSTED_GAIN=true
   -D P_LORA_BUSY=43
-  -D P_LORA_SCLK=45 
+  -D P_LORA_SCLK=45
   -D P_LORA_NSS=44
   -D P_LORA_DIO_1=40
   -D P_LORA_MISO=47
-  -D P_LORA_MOSI=46 
+  -D P_LORA_MOSI=46
   -D P_LORA_RESET=42
   -D P_LORA_TX_LED=PIN_LED_BLUE
   -D P_LORA_TX_LED_ON=LOW
@@ -119,3 +119,10 @@ lib_deps = ${ThinkNode_M3.lib_deps}
   densaugeo/base64 @ ~1.4.0
   stevemarple/MicroNMEA @ ^2.0.6
   end2endzone/NonBlockingRTTTL@^1.3.0
+
+[env:ThinkNode_M3_kiss_modem]
+extends = ThinkNode_M3
+build_src_filter = ${ThinkNode_M3.build_src_filter}
+  +<../examples/kiss_modem/>
+lib_deps = ${ThinkNode_M3.lib_deps}
+  stevemarple/MicroNMEA @ ^2.0.6
diff --git a/variants/thinknode_m3/target.cpp b/variants/thinknode_m3/target.cpp
index 7303eb4c..63ecdf76 100644
--- a/variants/thinknode_m3/target.cpp
+++ b/variants/thinknode_m3/target.cpp
@@ -87,6 +87,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/thinknode_m5/platformio.ini b/variants/thinknode_m5/platformio.ini
index 16df472a..8572d1eb 100644
--- a/variants/thinknode_m5/platformio.ini
+++ b/variants/thinknode_m5/platformio.ini
@@ -227,3 +227,8 @@ lib_deps =
   ${ThinkNode_M5.lib_deps}
   densaugeo/base64 @ ~1.4.0
   end2endzone/NonBlockingRTTTL@^1.3.0
+
+[env:ThinkNode_M5_kiss_modem]
+extends = ThinkNode_M5
+build_src_filter = ${ThinkNode_M5.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/thinknode_m5/target.cpp b/variants/thinknode_m5/target.cpp
index f5f3ecd3..e5908fdf 100644
--- a/variants/thinknode_m5/target.cpp
+++ b/variants/thinknode_m5/target.cpp
@@ -51,6 +51,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/thinknode_m6/platformio.ini b/variants/thinknode_m6/platformio.ini
index 2bd34f31..6fe90436 100644
--- a/variants/thinknode_m6/platformio.ini
+++ b/variants/thinknode_m6/platformio.ini
@@ -116,4 +116,9 @@ build_src_filter = ${ThinkNode_M6.build_src_filter}
 lib_deps =
   ${ThinkNode_M6.lib_deps}
   densaugeo/base64 @ ~1.4.0
-  end2endzone/NonBlockingRTTTL@^1.3.0
\ No newline at end of file
+  end2endzone/NonBlockingRTTTL@^1.3.0
+
+[env:ThinkNode_M6_kiss_modem]
+extends = ThinkNode_M6
+build_src_filter = ${ThinkNode_M6.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/thinknode_m6/target.cpp b/variants/thinknode_m6/target.cpp
index b690df18..01957362 100644
--- a/variants/thinknode_m6/target.cpp
+++ b/variants/thinknode_m6/target.cpp
@@ -37,6 +37,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/tiny_relay/platformio.ini b/variants/tiny_relay/platformio.ini
index ed178727..82cb251f 100644
--- a/variants/tiny_relay/platformio.ini
+++ b/variants/tiny_relay/platformio.ini
@@ -48,3 +48,8 @@ build_src_filter = ${Tiny_Relay.build_src_filter}
   +<../examples/companion_radio/*.cpp>
 lib_deps = ${Tiny_Relay.lib_deps}
   densaugeo/base64 @ ~1.4.0
+
+[env:Tiny_Relay_kiss_modem]
+extends = Tiny_Relay
+build_src_filter = ${Tiny_Relay.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/tiny_relay/target.cpp b/variants/tiny_relay/target.cpp
index 313dfaa9..c05f552e 100644
--- a/variants/tiny_relay/target.cpp
+++ b/variants/tiny_relay/target.cpp
@@ -68,6 +68,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr)
     radio.setSpreadingFactor(sf);
     radio.setBandwidth(bw);
     radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm)
diff --git a/variants/waveshare_rp2040_lora/platformio.ini b/variants/waveshare_rp2040_lora/platformio.ini
index 880f238f..36658d82 100644
--- a/variants/waveshare_rp2040_lora/platformio.ini
+++ b/variants/waveshare_rp2040_lora/platformio.ini
@@ -131,3 +131,8 @@ build_src_filter = ${waveshare_rp2040_lora.build_src_filter}
   +<../examples/simple_secure_chat/main.cpp>
 lib_deps = ${waveshare_rp2040_lora.lib_deps}
   densaugeo/base64 @ ~1.4.0
+
+[env:waveshare_rp2040_lora_kiss_modem]
+extends = waveshare_rp2040_lora
+build_src_filter = ${waveshare_rp2040_lora.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/waveshare_rp2040_lora/target.cpp b/variants/waveshare_rp2040_lora/target.cpp
index 459bf82c..907a37f5 100644
--- a/variants/waveshare_rp2040_lora/target.cpp
+++ b/variants/waveshare_rp2040_lora/target.cpp
@@ -37,6 +37,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/wio-e5-dev/platformio.ini b/variants/wio-e5-dev/platformio.ini
index d7e63c83..22bdc3c8 100644
--- a/variants/wio-e5-dev/platformio.ini
+++ b/variants/wio-e5-dev/platformio.ini
@@ -5,6 +5,8 @@ board_upload.maximum_size = 229376 ; 32kb for FS
 build_flags = ${stm32_base.build_flags}
   -D RADIO_CLASS=CustomSTM32WLx
   -D WRAPPER_CLASS=CustomSTM32WLxWrapper
+  -D LORA_TX_POWER=22
+  -D SX126X_CURRENT_LIMIT=140
   -D SPI_INTERFACES_COUNT=0
   -D RX_BOOSTED_GAIN=true
   -D PIN_SERIAL_RX=PB7
@@ -48,3 +50,8 @@ build_src_filter = ${lora_e5.build_src_filter}
   +<../examples/companion_radio/*.cpp>
 lib_deps = ${lora_e5.lib_deps}
   densaugeo/base64 @ ~1.4.0
+
+[env:wio-e5_kiss_modem]
+extends = lora_e5
+build_src_filter = ${lora_e5.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/wio-e5-dev/target.cpp b/variants/wio-e5-dev/target.cpp
index 3e59b6ce..8d8069eb 100644
--- a/variants/wio-e5-dev/target.cpp
+++ b/variants/wio-e5-dev/target.cpp
@@ -61,6 +61,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/wio-e5-mini/platformio.ini b/variants/wio-e5-mini/platformio.ini
index f589ea03..82f01331 100644
--- a/variants/wio-e5-mini/platformio.ini
+++ b/variants/wio-e5-mini/platformio.ini
@@ -7,6 +7,8 @@ build_flags = ${stm32_base.build_flags}
   -D WRAPPER_CLASS=CustomSTM32WLxWrapper
   -D SPI_INTERFACES_COUNT=0
   -D RX_BOOSTED_GAIN=true
+  -D LORA_TX_POWER=22
+  -D SX126X_CURRENT_LIMIT=140
   -D P_LORA_TX_LED=LED_RED
   -D PIN_USER_BTN=USER_BTN
   -I variants/wio-e5-mini
@@ -40,10 +42,15 @@ build_flags = ${lora_e5_mini.build_flags}
   -I examples/companion_radio/ui-orig
   -D LORA_TX_POWER=22
   -D MAX_CONTACTS=100
-  -D MAX_GROUP_CHANNELS=8  
+  -D MAX_GROUP_CHANNELS=8
   -D DISPLAY_CLASS=NullDisplayDriver
 build_src_filter = ${lora_e5_mini.build_src_filter}
   +<../examples/companion_radio/*.cpp>
   +<../examples/companion_radio/ui-orig/*.cpp>
 lib_deps = ${lora_e5_mini.lib_deps}
   densaugeo/base64 @ ~1.4.0
+
+[env:wio-e5-mini_kiss_modem]
+extends = lora_e5_mini
+build_src_filter = ${lora_e5_mini.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/wio-e5-mini/target.cpp b/variants/wio-e5-mini/target.cpp
index 2e95ad6d..338f398d 100644
--- a/variants/wio-e5-mini/target.cpp
+++ b/variants/wio-e5-mini/target.cpp
@@ -59,6 +59,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/wio-tracker-l1-eink/platformio.ini b/variants/wio-tracker-l1-eink/platformio.ini
index 42c83477..2c74bade 100644
--- a/variants/wio-tracker-l1-eink/platformio.ini
+++ b/variants/wio-tracker-l1-eink/platformio.ini
@@ -68,3 +68,8 @@ lib_deps = ${WioTrackerL1Eink.lib_deps}
   densaugeo/base64 @ ~1.4.0
   end2endzone/NonBlockingRTTTL@^1.3.0
 debug_tool=stlink
+
+[env:WioTrackerL1Eink_kiss_modem]
+extends = WioTrackerL1Eink
+build_src_filter = ${WioTrackerL1Eink.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/wio-tracker-l1/platformio.ini b/variants/wio-tracker-l1/platformio.ini
index 6c1e8f63..7bb175bb 100644
--- a/variants/wio-tracker-l1/platformio.ini
+++ b/variants/wio-tracker-l1/platformio.ini
@@ -111,3 +111,8 @@ lib_deps = ${WioTrackerL1.lib_deps}
   adafruit/RTClib @ ^2.1.3
   densaugeo/base64 @ ~1.4.0
   end2endzone/NonBlockingRTTTL@^1.3.0
+
+[env:WioTrackerL1_kiss_modem]
+extends = WioTrackerL1
+build_src_filter = ${WioTrackerL1.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/wio-tracker-l1/target.cpp b/variants/wio-tracker-l1/target.cpp
index 896ead26..76626551 100644
--- a/variants/wio-tracker-l1/target.cpp
+++ b/variants/wio-tracker-l1/target.cpp
@@ -42,6 +42,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/wio_wm1110/platformio.ini b/variants/wio_wm1110/platformio.ini
index ec65e706..a7eac916 100644
--- a/variants/wio_wm1110/platformio.ini
+++ b/variants/wio_wm1110/platformio.ini
@@ -84,3 +84,8 @@ build_src_filter = ${wio_wm1110.build_src_filter}
 lib_deps =
   ${wio_wm1110.lib_deps}
   densaugeo/base64 @ ~1.4.0
+
+[env:wio_wm1110_kiss_modem]
+extends = wio_wm1110
+build_src_filter = ${wio_wm1110.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/wio_wm1110/target.cpp b/variants/wio_wm1110/target.cpp
index 457d5bda..9be3061c 100644
--- a/variants/wio_wm1110/target.cpp
+++ b/variants/wio_wm1110/target.cpp
@@ -79,6 +79,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/xiao_c3/platformio.ini b/variants/xiao_c3/platformio.ini
index c5254b46..c0e8458d 100644
--- a/variants/xiao_c3/platformio.ini
+++ b/variants/xiao_c3/platformio.ini
@@ -128,3 +128,8 @@ lib_deps =
   ${Xiao_esp32_C3.lib_deps}
   ${esp32_ota.lib_deps}
   densaugeo/base64 @ ~1.4.0
+
+[env:Xiao_C3_kiss_modem]
+extends = Xiao_esp32_C3
+build_src_filter = ${Xiao_esp32_C3.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/xiao_c3/target.cpp b/variants/xiao_c3/target.cpp
index d6645f87..300ff60e 100644
--- a/variants/xiao_c3/target.cpp
+++ b/variants/xiao_c3/target.cpp
@@ -44,6 +44,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/xiao_c6/XiaoC6Board.cpp b/variants/xiao_c6/XiaoC6Board.cpp
index 5710c4cc..dc62c20e 100644
--- a/variants/xiao_c6/XiaoC6Board.cpp
+++ b/variants/xiao_c6/XiaoC6Board.cpp
@@ -37,6 +37,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/xiao_c6/platformio.ini b/variants/xiao_c6/platformio.ini
index 717be7b9..9f504b8e 100644
--- a/variants/xiao_c6/platformio.ini
+++ b/variants/xiao_c6/platformio.ini
@@ -184,3 +184,8 @@ build_src_filter = ${WHY2025_badge.build_src_filter}
 lib_deps =
   ${WHY2025_badge.lib_deps}
   densaugeo/base64 @ ~1.4.0
+
+[env:Xiao_C6_kiss_modem]
+extends = Xiao_C6
+build_src_filter = ${Xiao_C6.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/xiao_nrf52/target.cpp b/variants/xiao_nrf52/target.cpp
index 4d7d5912..9efe0015 100644
--- a/variants/xiao_nrf52/target.cpp
+++ b/variants/xiao_nrf52/target.cpp
@@ -32,6 +32,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/xiao_rp2040/platformio.ini b/variants/xiao_rp2040/platformio.ini
index e5d652c3..9a0fdaf4 100644
--- a/variants/xiao_rp2040/platformio.ini
+++ b/variants/xiao_rp2040/platformio.ini
@@ -108,3 +108,8 @@ build_src_filter = ${Xiao_rp2040.build_src_filter}
   +<../examples/simple_secure_chat/main.cpp>
 lib_deps = ${Xiao_rp2040.lib_deps}
   densaugeo/base64 @ ~1.4.0
+
+[env:Xiao_rp2040_kiss_modem]
+extends = Xiao_rp2040
+build_src_filter = ${Xiao_rp2040.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/xiao_rp2040/target.cpp b/variants/xiao_rp2040/target.cpp
index b3756480..67a09fcc 100644
--- a/variants/xiao_rp2040/target.cpp
+++ b/variants/xiao_rp2040/target.cpp
@@ -37,6 +37,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {
diff --git a/variants/xiao_s3/XiaoS3Board.h b/variants/xiao_s3/XiaoS3Board.h
new file mode 100644
index 00000000..288fcf62
--- /dev/null
+++ b/variants/xiao_s3/XiaoS3Board.h
@@ -0,0 +1,13 @@
+#pragma once
+
+#include <Arduino.h>
+#include <helpers/ESP32Board.h>
+
+class XiaoS3Board : public ESP32Board {
+public:
+  XiaoS3Board() { }
+
+  const char* getManufacturerName() const override {
+    return "Xiao S3";
+  }
+};
diff --git a/variants/xiao_s3/platformio.ini b/variants/xiao_s3/platformio.ini
new file mode 100644
index 00000000..bc000220
--- /dev/null
+++ b/variants/xiao_s3/platformio.ini
@@ -0,0 +1,154 @@
+[Xiao_S3]
+extends = esp32_base
+board = seeed_xiao_esp32s3
+board_check = true
+board_build.mcu = esp32s3
+build_flags = ${esp32_base.build_flags}
+  ${sensor_base.build_flags}
+  -I variants/xiao_s3
+  -UENV_INCLUDE_GPS
+  -D SEEED_XIAO_S3
+  -D PIN_VBAT_READ=1   ; D0
+  -D P_LORA_DIO_1=2    ; D1
+  -D P_LORA_NSS=5      ; D4
+  -D P_LORA_RESET=3    ; D2
+  -D P_LORA_BUSY=4     ; D3
+  -D P_LORA_SCLK=7     ; D8
+  -D P_LORA_MISO=8     ; D0
+  -D P_LORA_MOSI=9     ; D10
+  -D PIN_USER_BTN=-1   ; NC
+  -D PIN_STATUS_LED=21 ; Orange user led, LOW=On
+  -D PIN_BOARD_SDA=D6  ; D6=43
+  -D PIN_BOARD_SCL=D7  ; D7=44
+  -D SX126X_RXEN=6     ; D5
+  -D SX126X_TXEN=RADIOLIB_NC
+  -D SX126X_DIO2_AS_RF_SWITCH=true
+  -D SX126X_DIO3_TCXO_VOLTAGE=1.8
+  -D SX126X_CURRENT_LIMIT=140
+  -D RADIO_CLASS=CustomSX1262
+  -D WRAPPER_CLASS=CustomSX1262Wrapper
+  -D LORA_TX_POWER=22
+  -D SX126X_RX_BOOSTED_GAIN=1
+build_src_filter = ${esp32_base.build_src_filter}
+  +<../variants/xiao_s3>
+  +<helpers/sensors>
+lib_deps =
+  ${esp32_base.lib_deps}
+  ${sensor_base.lib_deps}
+
+[env:Xiao_S3_repeater]
+extends = Xiao_S3
+build_src_filter = ${Xiao_S3.build_src_filter}
+  +<../examples/simple_repeater/*.cpp>
+build_flags =
+  ${Xiao_S3.build_flags}
+  -D ADVERT_NAME='"Xiao S3 Repeater"'
+  -D ADVERT_LAT=0.0
+  -D ADVERT_LON=0.0
+  -D ADMIN_PASSWORD='"password"'
+  -D MAX_NEIGHBOURS=50
+;  -D MESH_PACKET_LOGGING=1
+;  -D MESH_DEBUG=1
+lib_deps =
+  ${Xiao_S3.lib_deps}
+  ${esp32_ota.lib_deps}
+
+[env:Xiao_S3_repeater_bridge_espnow]
+extends = Xiao_S3
+build_src_filter = ${Xiao_S3.build_src_filter}
+  +<helpers/bridges/ESPNowBridge.cpp>
+  +<../examples/simple_repeater/*.cpp>
+build_flags =
+  ${Xiao_S3.build_flags}
+  -D ADVERT_NAME='"ESPNow Bridge"'
+  -D ADVERT_LAT=0.0
+  -D ADVERT_LON=0.0
+  -D ADMIN_PASSWORD='"password"'
+  -D MAX_NEIGHBOURS=50
+  -D WITH_ESPNOW_BRIDGE=1
+;  -D BRIDGE_DEBUG=1
+;  -D MESH_PACKET_LOGGING=1
+;  -D MESH_DEBUG=1
+lib_deps =
+  ${Xiao_S3.lib_deps}
+  ${esp32_ota.lib_deps}
+
+[env:Xiao_S3_room_server]
+extends = Xiao_S3
+build_src_filter = ${Xiao_S3.build_src_filter}
+  +<../examples/simple_room_server>
+build_flags =
+  ${Xiao_S3.build_flags}
+  -D ADVERT_NAME='"Xiao S3 Room"'
+  -D ADVERT_LAT=0.0
+  -D ADVERT_LON=0.0
+  -D ADMIN_PASSWORD='"password"'
+  -D ROOM_PASSWORD='"hello"'
+;  -D MESH_PACKET_LOGGING=1
+;  -D MESH_DEBUG=1
+lib_deps =
+  ${Xiao_S3.lib_deps}
+  ${esp32_ota.lib_deps}
+
+[env:Xiao_S3_companion_radio_ble]
+extends = Xiao_S3
+build_flags =
+  ${Xiao_S3.build_flags}
+  -I examples/companion_radio/ui-new
+  -D MAX_CONTACTS=350
+  -D MAX_GROUP_CHANNELS=40
+  -D BLE_PIN_CODE=123456
+  -D DISPLAY_CLASS=SSD1306Display
+  -D OFFLINE_QUEUE_SIZE=256
+;  -D BLE_DEBUG_LOGGING=1
+;  -D MESH_PACKET_LOGGING=1
+;  -D MESH_DEBUG=1
+build_src_filter = ${Xiao_S3.build_src_filter}
+  +<helpers/ui/SSD1306Display.cpp>
+  +<helpers/esp32/*.cpp>
+  +<helpers/ui/MomentaryButton.cpp>
+  +<../examples/companion_radio/*.cpp>
+  +<../examples/companion_radio/ui-new/*.cpp>
+lib_deps =
+  ${Xiao_S3.lib_deps}
+  densaugeo/base64 @ ~1.4.0
+  adafruit/Adafruit SSD1306 @ ^2.5.13
+
+[env:Xiao_S3_companion_radio_usb]
+extends = Xiao_S3
+build_flags =
+  ${Xiao_S3.build_flags}
+  -I examples/companion_radio/ui-new
+  -D MAX_CONTACTS=350
+  -D MAX_GROUP_CHANNELS=40
+  -D DISPLAY_CLASS=SSD1306Display
+  -D OFFLINE_QUEUE_SIZE=256
+;  -D BLE_DEBUG_LOGGING=1
+;  -D MESH_PACKET_LOGGING=1
+;  -D MESH_DEBUG=1
+build_src_filter = ${Xiao_S3.build_src_filter}
+  +<helpers/ui/SSD1306Display.cpp>
+  +<helpers/esp32/*.cpp>
+  +<helpers/ui/MomentaryButton.cpp>
+  +<../examples/companion_radio/*.cpp>
+  +<../examples/companion_radio/ui-new/*.cpp>
+lib_deps =
+  ${Xiao_S3.lib_deps}
+  densaugeo/base64 @ ~1.4.0
+  adafruit/Adafruit SSD1306 @ ^2.5.13
+
+[env:Xiao_S3_sensor]
+extends = Xiao_S3
+build_src_filter = ${Xiao_S3.build_src_filter}
+  +<../examples/simple_sensor>
+build_flags =
+  ${Xiao_S3.build_flags}
+  -D ADVERT_NAME='"Xiao S3 Sensor"'
+  -D ADVERT_LAT=0.0
+  -D ADVERT_LON=0.0
+  -D ADMIN_PASSWORD='"password"'
+;  -D MESH_PACKET_LOGGING=1
+;  -D MESH_DEBUG=1
+lib_deps =
+  ${Xiao_S3.lib_deps}
+  ${esp32_ota.lib_deps}
\ No newline at end of file
diff --git a/variants/xiao_s3/target.cpp b/variants/xiao_s3/target.cpp
new file mode 100644
index 00000000..014b2552
--- /dev/null
+++ b/variants/xiao_s3/target.cpp
@@ -0,0 +1,56 @@
+#include <Arduino.h>
+#include "target.h"
+
+XiaoS3Board board;
+
+#if defined(P_LORA_SCLK)
+  static SPIClass spi;
+  RADIO_CLASS radio = new Module(P_LORA_NSS, P_LORA_DIO_1, P_LORA_RESET, P_LORA_BUSY, spi);
+#else
+  RADIO_CLASS radio = new Module(P_LORA_NSS, P_LORA_DIO_1, P_LORA_RESET, P_LORA_BUSY);
+#endif
+
+WRAPPER_CLASS radio_driver(radio, board);
+
+ESP32RTCClock fallback_clock;
+AutoDiscoverRTCClock rtc_clock(fallback_clock);
+EnvironmentSensorManager sensors;
+
+#ifdef DISPLAY_CLASS
+  DISPLAY_CLASS display;
+  MomentaryButton user_btn(PIN_USER_BTN, 1000, true);
+#endif
+
+bool radio_init() {
+  fallback_clock.begin();
+  rtc_clock.begin(Wire);
+  pinMode(21, INPUT);
+  pinMode(48, OUTPUT);
+
+  #if defined(P_LORA_SCLK)
+  spi.begin(P_LORA_SCLK, P_LORA_MISO, P_LORA_MOSI);
+  return radio.std_init(&spi);
+#else
+  return radio.std_init();
+#endif
+}
+
+uint32_t radio_get_rng_seed() {
+  return radio.random(0x7FFFFFFF);
+}
+
+void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
+  radio.setFrequency(freq);
+  radio.setSpreadingFactor(sf);
+  radio.setBandwidth(bw);
+  radio.setCodingRate(cr);
+}
+
+void radio_set_tx_power(int8_t dbm) {
+  radio.setOutputPower(dbm);
+}
+
+mesh::LocalIdentity radio_new_identity() {
+  RadioNoiseListener rng(radio);
+  return mesh::LocalIdentity(&rng);  // create new random identity
+}
diff --git a/variants/xiao_s3/target.h b/variants/xiao_s3/target.h
new file mode 100644
index 00000000..93b27862
--- /dev/null
+++ b/variants/xiao_s3/target.h
@@ -0,0 +1,30 @@
+#pragma once
+
+#define RADIOLIB_STATIC_ONLY 1
+#include <RadioLib.h>
+#include <helpers/radiolib/RadioLibWrappers.h>
+#include <helpers/ESP32Board.h>
+#include <helpers/radiolib/CustomSX1262Wrapper.h>
+#include <helpers/AutoDiscoverRTCClock.h>
+#include <helpers/sensors/EnvironmentSensorManager.h>
+#ifdef DISPLAY_CLASS
+  #include <helpers/ui/SSD1306Display.h>
+  #include <helpers/ui/MomentaryButton.h>
+#endif
+#include "XiaoS3Board.h"
+
+extern XiaoS3Board board;
+extern WRAPPER_CLASS radio_driver;
+extern AutoDiscoverRTCClock rtc_clock;
+extern EnvironmentSensorManager sensors;
+
+#ifdef DISPLAY_CLASS
+  extern DISPLAY_CLASS display;
+  extern MomentaryButton user_btn;
+#endif
+
+bool radio_init();
+uint32_t radio_get_rng_seed();
+void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
+void radio_set_tx_power(int8_t dbm);
+mesh::LocalIdentity radio_new_identity();
diff --git a/variants/xiao_s3_wio/platformio.ini b/variants/xiao_s3_wio/platformio.ini
index 13d40679..db8c5a94 100644
--- a/variants/xiao_s3_wio/platformio.ini
+++ b/variants/xiao_s3_wio/platformio.ini
@@ -234,3 +234,8 @@ build_flags =
 lib_deps =
   ${Xiao_S3_WIO.lib_deps}
   ${esp32_ota.lib_deps}
+
+[env:Xiao_S3_WIO_kiss_modem]
+extends = Xiao_S3_WIO
+build_src_filter = ${Xiao_S3_WIO.build_src_filter}
+  +<../examples/kiss_modem/>
diff --git a/variants/xiao_s3_wio/target.cpp b/variants/xiao_s3_wio/target.cpp
index 42356b0e..ca824d38 100644
--- a/variants/xiao_s3_wio/target.cpp
+++ b/variants/xiao_s3_wio/target.cpp
@@ -44,6 +44,7 @@ void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr) {
   radio.setSpreadingFactor(sf);
   radio.setBandwidth(bw);
   radio.setCodingRate(cr);
+  radio_driver.updatePreamble(sf);
 }
 
 void radio_set_tx_power(int8_t dbm) {