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feat(repeater): suppress Adaptive Power Control while relaying

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A repeater wants full, consistent TX power for relay reach, and APC's feedback
(own ACKs / own flood echoes) never fires on forwarded traffic — so leaving APC
on would relay at whatever reduced power it last trimmed to, or sit inert on a
dedicated repeater network. Force it off whenever client_repeat is on, mirroring
the power-save lock:

- apcActive() = tx_apc && !client_repeat gates every APC control site
  (sample/failure/track).
- applyApc() pins power to the tx_power_dbm ceiling; called at boot, on the
  on-device repeater toggle, and on the app's CMD_SET_RADIO_PARAMS.
- Settings "Auto pwr" shows "--" and blocks the toggle while repeating; the
  user's pref is preserved and restored when the repeater is switched off.

Also refreshes the FEATURES repeater entry (Hold-Enter reset, Errors row, schema
0x10, the radio-setting locks and status indicator).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
Jakub
2026-06-19 14:45:34 +02:00
co-authored by Claude Sonnet 4.6
parent 84a76adcf1
commit 885662beae
7 changed files with 36 additions and 16 deletions
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docs/solo_features/settings_screen/settings_screen.md
+1 -1
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@@ -72,7 +72,7 @@ Lists all available home screen pages. For each entry:
| BW | 7.8–500 kHz | LEFT/RIGHT cycles the standard LoRa bandwidths. |
| CR | 5–8 | LEFT/RIGHT. Coding rate (4/5–4/8). |
| 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). **Forced off (shown as `--`) while the repeater is on** — a repeater must listen continuously; your setting is restored when the repeater is switched off. |
| Auto pwr | ON / OFF | **Adaptive Power Control.** Lowers actual TX power on strong links to save energy, ramping back up — to the **TX Pwr** 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). |
| Auto pwr | ON / OFF | **Adaptive Power Control.** Lowers actual TX power on strong links to save energy, ramping back up — to the **TX Pwr** 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). **Suppressed (shown as `--`) while the repeater is on** — a repeater holds full TX power for consistent relay reach; your setting is restored when the repeater is switched off. |
The **repeater** mode and its flood filters live on their own screen — see **Tools › Repeater**.