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docs: fix broken and misaligned tables

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Sefinek
2026-05-28 15:15:47 +02:00
parent 888ad4589c
commit 2adea02e9c
7 changed files with 315 additions and 313 deletions
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docs/kiss_modem_protocol.md
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@@ -10,10 +10,10 @@ Standard KISS TNC firmware for MeshCore LoRa radios. Compatible with any KISS cl
Standard KISS framing per the KA9Q/K3MC specification.
| Byte | Name | Description |
|------|------|-------------|
| `0xC0` | FEND | Frame delimiter |
| `0xDB` | FESC | Escape character |
| Byte | Name | Description |
|--------|-------|------------------------------------|
| `0xC0` | FEND | Frame delimiter |
| `0xDB` | FESC | Escape character |
| `0xDC` | TFEND | Escaped FEND (FESC + TFEND = 0xC0) |
| `0xDD` | TFESC | Escaped FESC (FESC + TFESC = 0xDB) |
@@ -28,10 +28,10 @@ Standard KISS framing per the KA9Q/K3MC specification.
The type byte is split into two nibbles:
| Bits | Field | Description |
|------|-------|-------------|
| 7-4 | Port | Port number (0 for single-port TNC) |
| 3-0 | Command | Command number |
| Bits | Field | Description |
|------|---------|-------------------------------------|
| 7-4 | Port | Port number (0 for single-port TNC) |
| 3-0 | Command | Command number |
Maximum unescaped frame size: 512 bytes.
@@ -39,21 +39,21 @@ Maximum unescaped frame size: 512 bytes.
### Host to TNC
| Command | Value | Data | Description |
|---------|-------|------|-------------|
| Data | `0x00` | Raw packet | Queue packet for transmission |
| TXDELAY | `0x01` | Delay (1 byte) | Transmitter keyup delay in 10ms units (default: 50 = 500ms) |
| Persistence | `0x02` | P (1 byte) | CSMA persistence parameter 0-255 (default: 63) |
| SlotTime | `0x03` | Interval (1 byte) | CSMA slot interval in 10ms units (default: 10 = 100ms) |
| TXtail | `0x04` | Delay (1 byte) | Post-TX hold time in 10ms units (default: 0) |
| FullDuplex | `0x05` | Mode (1 byte) | 0 = half duplex, nonzero = full duplex (default: 0) |
| SetHardware | `0x06` | Sub-command + data | MeshCore extensions (see below) |
| Return | `0xFF` | - | Exit KISS mode (no-op) |
| Command | Value | Data | Description |
|-------------|--------|--------------------|-------------------------------------------------------------|
| Data | `0x00` | Raw packet | Queue packet for transmission |
| TXDELAY | `0x01` | Delay (1 byte) | Transmitter keyup delay in 10ms units (default: 50 = 500ms) |
| Persistence | `0x02` | P (1 byte) | CSMA persistence parameter 0-255 (default: 63) |
| SlotTime | `0x03` | Interval (1 byte) | CSMA slot interval in 10ms units (default: 10 = 100ms) |
| TXtail | `0x04` | Delay (1 byte) | Post-TX hold time in 10ms units (default: 0) |
| FullDuplex | `0x05` | Mode (1 byte) | 0 = half duplex, nonzero = full duplex (default: 0) |
| SetHardware | `0x06` | Sub-command + data | MeshCore extensions (see below) |
| Return | `0xFF` | - | Exit KISS mode (no-op) |
### TNC to Host
| Type | Value | Data | Description |
|------|-------|------|-------------|
| Type | Value | Data | Description |
|------|--------|------------|----------------------------|
| Data | `0x00` | Raw packet | Received packet from radio |
Data frames carry raw packet data only, with no metadata prepended. The Data command payload is limited to 255 bytes to match the MeshCore maximum transmission unit (MAX_TRANS_UNIT); frames larger than 255 bytes are silently dropped. The KISS specification recommends at least 1024 bytes for general-purpose TNCs; this modem is intended for MeshCore packets only, whose protocol MTU is 255 bytes.
@@ -84,79 +84,79 @@ MeshCore-specific functionality uses the standard KISS SetHardware command. The
### Request Sub-commands (Host to TNC)
| Sub-command | Value | Data |
|-------------|-------|------|
| GetIdentity | `0x01` | - |
| GetRandom | `0x02` | Length (1 byte, 1-64) |
| VerifySignature | `0x03` | PubKey (32) + Signature (64) + Data |
| SignData | `0x04` | Data to sign |
| EncryptData | `0x05` | Key (32) + Plaintext |
| DecryptData | `0x06` | Key (32) + MAC (2) + Ciphertext |
| KeyExchange | `0x07` | Remote PubKey (32) |
| Hash | `0x08` | Data to hash |
| SetRadio | `0x09` | Freq (4) + BW (4) + SF (1) + CR (1) |
| SetTxPower | `0x0A` | Power dBm (1) |
| GetRadio | `0x0B` | - |
| GetTxPower | `0x0C` | - |
| GetCurrentRssi | `0x0D` | - |
| IsChannelBusy | `0x0E` | - |
| GetAirtime | `0x0F` | Packet length (1) |
| GetNoiseFloor | `0x10` | - |
| GetVersion | `0x11` | - |
| GetStats | `0x12` | - |
| GetBattery | `0x13` | - |
| GetMCUTemp | `0x14` | - |
| GetSensors | `0x15` | Permissions (1) |
| GetDeviceName | `0x16` | - |
| Ping | `0x17` | - |
| Reboot | `0x18` | - |
| Sub-command | Value | Data |
|-----------------|--------|------------------------------------------|
| GetIdentity | `0x01` | - |
| GetRandom | `0x02` | Length (1 byte, 1-64) |
| VerifySignature | `0x03` | PubKey (32) + Signature (64) + Data |
| SignData | `0x04` | Data to sign |
| EncryptData | `0x05` | Key (32) + Plaintext |
| DecryptData | `0x06` | Key (32) + MAC (2) + Ciphertext |
| KeyExchange | `0x07` | Remote PubKey (32) |
| Hash | `0x08` | Data to hash |
| SetRadio | `0x09` | Freq (4) + BW (4) + SF (1) + CR (1) |
| SetTxPower | `0x0A` | Power dBm (1) |
| GetRadio | `0x0B` | - |
| GetTxPower | `0x0C` | - |
| GetCurrentRssi | `0x0D` | - |
| IsChannelBusy | `0x0E` | - |
| GetAirtime | `0x0F` | Packet length (1) |
| GetNoiseFloor | `0x10` | - |
| GetVersion | `0x11` | - |
| GetStats | `0x12` | - |
| GetBattery | `0x13` | - |
| GetMCUTemp | `0x14` | - |
| GetSensors | `0x15` | Permissions (1) |
| GetDeviceName | `0x16` | - |
| Ping | `0x17` | - |
| Reboot | `0x18` | - |
| SetSignalReport | `0x19` | Enable (1): 0x00=disable, nonzero=enable |
| GetSignalReport | `0x1A` | - |
| GetSignalReport | `0x1A` | - |
### Response Sub-commands (TNC to Host)
Response codes use the high-bit convention: `response = command | 0x80`. Generic and unsolicited responses use the `0xF0`+ range.
| Sub-command | Value | Data |
|-------------|-------|------|
| Identity | `0x81` | PubKey (32) |
| Random | `0x82` | Random bytes (1-64) |
| Verify | `0x83` | Result (1): 0x00=invalid, 0x01=valid |
| Signature | `0x84` | Signature (64) |
| Encrypted | `0x85` | MAC (2) + Ciphertext |
| Decrypted | `0x86` | Plaintext |
| SharedSecret | `0x87` | Shared secret (32) |
| Hash | `0x88` | SHA-256 hash (32) |
| Radio | `0x8B` | Freq (4) + BW (4) + SF (1) + CR (1) |
| TxPower | `0x8C` | Power dBm (1) |
| CurrentRssi | `0x8D` | RSSI dBm (1, signed) |
| ChannelBusy | `0x8E` | Result (1): 0x00=clear, 0x01=busy |
| Airtime | `0x8F` | Milliseconds (4) |
| NoiseFloor | `0x90` | dBm (2, signed) |
| Version | `0x91` | Version (1) + Reserved (1) |
| Stats | `0x92` | RX (4) + TX (4) + Errors (4) |
| Battery | `0x93` | Millivolts (2) |
| MCUTemp | `0x94` | Temperature (2, signed) |
| Sensors | `0x95` | CayenneLPP payload |
| DeviceName | `0x96` | Name (variable, UTF-8) |
| Pong | `0x97` | - |
| Sub-command | Value | Data |
|--------------|--------|-----------------------------------------|
| Identity | `0x81` | PubKey (32) |
| Random | `0x82` | Random bytes (1-64) |
| Verify | `0x83` | Result (1): 0x00=invalid, 0x01=valid |
| Signature | `0x84` | Signature (64) |
| Encrypted | `0x85` | MAC (2) + Ciphertext |
| Decrypted | `0x86` | Plaintext |
| SharedSecret | `0x87` | Shared secret (32) |
| Hash | `0x88` | SHA-256 hash (32) |
| Radio | `0x8B` | Freq (4) + BW (4) + SF (1) + CR (1) |
| TxPower | `0x8C` | Power dBm (1) |
| CurrentRssi | `0x8D` | RSSI dBm (1, signed) |
| ChannelBusy | `0x8E` | Result (1): 0x00=clear, 0x01=busy |
| Airtime | `0x8F` | Milliseconds (4) |
| NoiseFloor | `0x90` | dBm (2, signed) |
| Version | `0x91` | Version (1) + Reserved (1) |
| Stats | `0x92` | RX (4) + TX (4) + Errors (4) |
| Battery | `0x93` | Millivolts (2) |
| MCUTemp | `0x94` | Temperature (2, signed) |
| Sensors | `0x95` | CayenneLPP payload |
| DeviceName | `0x96` | Name (variable, UTF-8) |
| Pong | `0x97` | - |
| SignalReport | `0x9A` | Status (1): 0x00=disabled, 0x01=enabled |
| OK | `0xF0` | - |
| Error | `0xF1` | Error code (1) |
| TxDone | `0xF8` | Result (1): 0x00=failed, 0x01=success |
| RxMeta | `0xF9` | SNR (1) + RSSI (1) |
| OK | `0xF0` | - |
| Error | `0xF1` | Error code (1) |
| TxDone | `0xF8` | Result (1): 0x00=failed, 0x01=success |
| RxMeta | `0xF9` | SNR (1) + RSSI (1) |
### Error Codes
| Code | Value | Description |
|------|-------|-------------|
| InvalidLength | `0x01` | Request data too short |
| InvalidParam | `0x02` | Invalid parameter value |
| NoCallback | `0x03` | Feature not available |
| MacFailed | `0x04` | MAC verification failed |
| UnknownCmd | `0x05` | Unknown sub-command |
| EncryptFailed | `0x06` | Encryption failed |
| TxBusy | `0x07` | Transmit busy |
| Code | Value | Description |
|---------------|--------|-------------------------|
| InvalidLength | `0x01` | Request data too short |
| InvalidParam | `0x02` | Invalid parameter value |
| NoCallback | `0x03` | Feature not available |
| MacFailed | `0x04` | MAC verification failed |
| UnknownCmd | `0x05` | Unknown sub-command |
| EncryptFailed | `0x06` | Encryption failed |
| TxBusy | `0x07` | Transmit busy |
### Unsolicited Events
@@ -172,41 +172,41 @@ The TNC sends these SetHardware frames without a preceding request:
All values little-endian.
| Field | Size | Description |
|-------|------|-------------|
| Frequency | 4 bytes | Hz (e.g., 869618000) |
| Bandwidth | 4 bytes | Hz (e.g., 62500) |
| SF | 1 byte | Spreading factor (5-12) |
| CR | 1 byte | Coding rate (5-8) |
| Field | Size | Description |
|-----------|---------|-------------------------|
| Frequency | 4 bytes | Hz (e.g., 869618000) |
| Bandwidth | 4 bytes | Hz (e.g., 62500) |
| SF | 1 byte | Spreading factor (5-12) |
| CR | 1 byte | Coding rate (5-8) |
### Version (Version response)
| Field | Size | Description |
|-------|------|-------------|
| Version | 1 byte | Firmware version |
| Reserved | 1 byte | Always 0 |
| Field | Size | Description |
|----------|--------|------------------|
| Version | 1 byte | Firmware version |
| Reserved | 1 byte | Always 0 |
### Encrypted (Encrypted response)
| Field | Size | Description |
|-------|------|-------------|
| MAC | 2 bytes | HMAC-SHA256 truncated to 2 bytes |
| Field | Size | Description |
|------------|----------|------------------------------------------------|
| MAC | 2 bytes | HMAC-SHA256 truncated to 2 bytes |
| Ciphertext | variable | AES-128 block-encrypted data with zero padding |
### Airtime (Airtime response)
All values little-endian.
| Field | Size | Description |
|-------|------|-------------|
| Field | Size | Description |
|---------|---------|----------------------------------------------|
| Airtime | 4 bytes | uint32_t, estimated air time in milliseconds |
### Noise Floor (NoiseFloor response)
All values little-endian.
| Field | Size | Description |
|-------|------|-------------|
| Field | Size | Description |
|-------------|---------|-----------------------|
| Noise floor | 2 bytes | int16_t, dBm (signed) |
The modem recalibrates the noise floor every 2 seconds with an AGC reset every 30 seconds.
@@ -215,35 +215,35 @@ The modem recalibrates the noise floor every 2 seconds with an AGC reset every 3
All values little-endian.
| Field | Size | Description |
|-------|------|-------------|
| RX | 4 bytes | Packets received |
| TX | 4 bytes | Packets transmitted |
| Errors | 4 bytes | Receive errors |
| Field | Size | Description |
|--------|---------|---------------------|
| RX | 4 bytes | Packets received |
| TX | 4 bytes | Packets transmitted |
| Errors | 4 bytes | Receive errors |
### Battery (Battery response)
All values little-endian.
| Field | Size | Description |
|-------|------|-------------|
| Field | Size | Description |
|------------|---------|---------------------------------|
| Millivolts | 2 bytes | uint16_t, battery voltage in mV |
### MCU Temperature (MCUTemp response)
All values little-endian.
| Field | Size | Description |
|-------|------|-------------|
| Field | Size | Description |
|-------------|---------|--------------------------------------------|
| Temperature | 2 bytes | int16_t, tenths of °C (e.g., 253 = 25.3°C) |
Returns `NoCallback` error if the board does not support temperature readings.
### Device Name (DeviceName response)
| Field | Size | Description |
|-------|------|-------------|
| Name | variable | UTF-8 string, no null terminator |
| Field | Size | Description |
|-------|----------|----------------------------------|
| Name | variable | UTF-8 string, no null terminator |
### Reboot
@@ -251,11 +251,11 @@ Sends an `OK` response, flushes serial, then reboots the device. The host should
### Sensor Permissions (GetSensors)
| Bit | Value | Description |
|-----|-------|-------------|
| 0 | `0x01` | Base (battery) |
| 1 | `0x02` | Location (GPS) |
| 2 | `0x04` | Environment (temp, humidity, pressure) |
| Bit | Value | Description |
|-----|--------|----------------------------------------|
| 0 | `0x01` | Base (battery) |
| 1 | `0x02` | Location (GPS) |
| 2 | `0x04` | Environment (temp, humidity, pressure) |
Use `0x07` for all permissions.
@@ -265,12 +265,12 @@ Data returned in CayenneLPP format. See [CayenneLPP documentation](https://docs.
## Cryptographic Algorithms
| Operation | Algorithm |
|-----------|-----------|
| Identity / Signing / Verification | Ed25519 |
| Key Exchange | X25519 (ECDH) |
| Encryption | AES-128 block encryption with zero padding + HMAC-SHA256 (MAC truncated to 2 bytes) |
| Hashing | SHA-256 |
| Operation | Algorithm |
|-----------------------------------|-------------------------------------------------------------------------------------|
| Identity / Signing / Verification | Ed25519 |
| Key Exchange | X25519 (ECDH) |
| Encryption | AES-128 block encryption with zero padding + HMAC-SHA256 (MAC truncated to 2 bytes) |
| Hashing | SHA-256 |
## Notes