## Settings Screen

[Go back](../../../README.md)

### Overview

|           OLED            |           E-Ink           |
| :-----------------------: | :-----------------------: |
| ![](./set_scr_1_oled.png) | ![](./set_scr_1_eink.png) |

All settings are saved to flash and restored on next boot. Settings are organised into collapsible sections. Press **Enter** on a section header to expand or collapse it — all sections start collapsed for faster navigation. Press **LEFT/RIGHT** to change a value, or **Enter** for toggle items.

Press **Cancel/Back** to save and return to the home screen.

---

### Display

| Setting                              | Options                          | Notes                                                                                                 |
| ------------------------------------ | -------------------------------- | ----------------------------------------------------------------------------------------------------- |
| Brightness                           | 1–5                              | LEFT/RIGHT; preview applies immediately                                                               |
| Auto-off                             | 5 s / 15 s / 30 s / 60 s / never | LEFT/RIGHT                                                                                            |
| Auto-lock                            | on / off                         | Locks device when display turns off                                                                   |
| Battery                              | icon / % / V                     | Display mode for the top-bar battery indicator                                                        |
| Clock seconds                        | show / hide                      | Hiding reduces OLED refresh from 1 s to 60 s                                                          |
| Clock format                         | 24 h / 12 h                      | 12 h appends AM/PM                                                                                    |
| Font                                 | Default / Lemon                  | Default: 5×7 Adafruit with ASCII transliteration; Lemon: native Unicode with pixel-accurate line wrap |
| Display rotation _(e-ink only)_      | 0° / 90° / 180° / 270°           | Applied immediately                                                                                   |
| Joystick rotation _(e-ink only)_     | 0° / 90° / 180° / 270°           | Rotates input mapping independently of display rotation; useful for custom enclosures                 |
| Full refresh interval _(e-ink only)_ | off / 5 / 10 / 20 / 30           | Partial refreshes between full clears; reduces ghosting on long sessions                              |

---

### Sound

| Setting        | Options                        | Notes                                                        |
| -------------- | ------------------------------ | ------------------------------------------------------------ |
| Buzzer         | On / Off / Auto                | Auto: silences while BLE connected, re-enables on disconnect |
| Volume         | 1–5                            | LEFT/RIGHT; preview tone plays on each change                |
| DM Melody      | built-in / Melody 1 / Melody 2 / None | Notification sound for incoming private messages. `None` disables the sound for this event. |
| Channel Melody | built-in / Melody 1 / Melody 2 / None | Notification sound for incoming channel messages. `None` disables the sound for this event. |
| AD sound       | built-in / Melody 1 / Melody 2 / None | Sound played whenever an **advert** is received from *any* node — pairs with Auto-Advert as an audible "in range" heartbeat (see Tools › Auto-Advert). `None` disables the sound for this event. |
| AD scope       | All / Zero-hop                | Filters the AD sound so it plays for every advert or only for local zero-hop adverts. |

Melody 1 and Melody 2 are custom sequences editable in **Tools › Ringtone Editor**.

---

### Home Pages

|           OLED            |           E-Ink           |
| :-----------------------: | :-----------------------: |
| ![](./set_scr_2_oled.png) | ![](./set_scr_2_eink.png) |

Lists all available home screen pages. For each entry:

- **LEFT / RIGHT** — move the page earlier or later in the navigation sequence
- **Enter** — toggle the page ON / OFF

**Settings** and **Messages** are always visible and cannot be disabled.

---

### Radio

| Setting   | Options    | Notes                                                                                                                                                              |
| --------- | ---------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| TX power  | 2–22 dBm   | LEFT/RIGHT. With **Auto pwr** on this is the *ceiling* — the radio may transmit lower. |
| Pwr save  | ON / OFF   | **Battery saver.** Hardware duty-cycle receive: the SX126x cycles RX↔sleep on its own and wakes on a preamble, cutting average RX current. Trades a little receive latency; leave OFF for lowest-latency reception. Requires an SX126x radio (otherwise stays on continuous RX). |
| Auto pwr  | ON / OFF   | **Adaptive Power Control.** Lowers actual TX power on strong links to save energy, ramping back up — to the **TX power** ceiling — on weak or lost links. Link quality comes from direct-message ACK SNR and, for channel messages (no ACK), from hearing a repeater rebroadcast your packet. The radio page / name bar shows the live power. Default OFF (fixed TX power). |

---

### System

| Setting     | Options                                             | Notes                                                                                  |
| ----------- | --------------------------------------------------- | -------------------------------------------------------------------------------------- |
| Timezone    | −12 h … +14 h                                       | UTC offset in whole hours                                                              |
| Low battery | off / 3.0 V / 3.1 V / 3.2 V / 3.3 V / 3.4 V / 3.5 V | Auto-shutdown threshold; also sets the 0 % anchor for the battery percentage indicator |
| Units       | Metric / Imperial                                   | Global unit system for every distance/speed shown in Tools (Nearby Nodes, Trail, navigate-to-point). Metric: m / km, km/h, min/km. Imperial: ft / mi, mph, min/mi |

---

### Contacts

| Setting  | Options          | Notes                                                |
| -------- | ---------------- | ---------------------------------------------------- |
| DMs      | all / favourites | Show all chat contacts or only upstream-starred ones |
| Channels | all / favourites | Show all channels or only favourited ones            |
| Rooms    | all / favourites | Show all room servers or only favourited ones        |

---

### Messages

| Setting | Options        | Notes                                                                                          |
| ------- | -------------- | ---------------------------------------------------------------------------------------------- |
| Resend  | off / 1×–5×    | Auto-resend an on-device direct message this many times when no delivery ACK is received (default 2×) |

Up to 10 quick reply templates (Q1–Q10). Press **Enter** on a slot to open the keyboard editor. Supports the same placeholders as the main keyboard (`{time}`, `{loc}`, and sensor placeholders when connected).
