Sensor and battery dropout alerts #54

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opened 2026-08-31 17:30:06 +02:00 by robert · 0 comments

robert commented

2026-08-31 17:30:06 +02:00

(Migrated from git.butzei.de)

Goal

A wheel sensor, power meter or strap going flat mid-ride is currently silent: speed just falls back to GPS without saying so. The rider should find out from the watch, not from the data afterwards.

Acceptance criteria

Each BLE sensor tracked for staleness; a dropout raises an alert rather than silently degrading
Alert shown on the watch with a distinct vibration, and dismissable
Reconnection reported too, so the rider knows the sensor is back
Low watch battery warned at a configurable threshold
Low phone battery warned on the watch - the rider cannot see the phone
Sensor battery level warned where the peripheral exposes it
Alerts rate-limited: a flapping sensor must not buzz continuously
Alerts suppressed while the ride is paused

Files

companion/.../sensors/
watchapp/src/c/view_ride.c

Notes

Applies to all three sensor types from D16: speed, cadence and power.

## Goal A wheel sensor, power meter or strap going flat mid-ride is currently silent: speed just falls back to GPS without saying so. The rider should find out from the watch, not from the data afterwards. ## Acceptance criteria - [ ] Each BLE sensor tracked for staleness; a dropout raises an alert rather than silently degrading - [ ] Alert shown on the watch with a distinct vibration, and dismissable - [ ] Reconnection reported too, so the rider knows the sensor is back - [ ] Low watch battery warned at a configurable threshold - [ ] Low phone battery warned on the watch - the rider cannot see the phone - [ ] Sensor battery level warned where the peripheral exposes it - [ ] Alerts rate-limited: a flapping sensor must not buzz continuously - [ ] Alerts suppressed while the ride is paused ## Files - `companion/.../sensors/` - `watchapp/src/c/view_ride.c` ## Notes Applies to all three sensor types from D16: speed, cadence and power.