Battery "fetch-device-info" with docker-compose

[matt8707]

Continuing #41 (comment)

I'm unsure how to pass the --fetch-device-info command-line option in docker-compose

I've tried variations of command: --fetch-device-info and passing it along a mqtt payload

[fphammerle]

would that work?

command: >-
  switchbot-mqtt --mqtt-host "$MQTT_HOST" --mqtt-port "$MQTT_PORT"
  --mqtt-username "$MQTT_USERNAME" --mqtt-password "$MQTT_PASSWORD"
  --fetch-device-info

I should add support for setting that flag via an environment variable

[matt8707]

That passes and an environment variable would be neat.

docker logs switchbot-mqtt
"In docker-based setups, you could use sudo docker run --cap-drop ALL --cap-add NET_ADMIN --user 0 … (seriously insecure)."

Just to make sure, I have to run it insecure if I want battery-percentage?

Working compose file:

version: '3'
services:
  switchbot-mqtt:
    image: fphammerle/switchbot-mqtt:2.0.0-armv7
    container_name: switchbot-mqtt
    restart: always
    network_mode: host
    userns_mode: host
    cap_add:
      - NET_ADMIN
    cap_drop:
      - ALL
    user: '0'
    command: >
      switchbot-mqtt
        --mqtt-host "$MQTT_HOST"
        --mqtt-port "$MQTT_PORT"
        --fetch-device-info

Also why is battery-percentage published to "cover" for switches?

[fphammerle]

Just to make sure, I have to run it insecure if I want battery-percentage?

Unfortunately, yes. On Linux the NET_ADMIN capability is required to retrieve battery percentage via bluetooth low-energy.

Also why is battery-percentage published to "cover" for switches?

Thanks! That should not be the case. I'll fix that in an upcoming release.

[fphammerle]

Could you retry with v2.1.0?

The new release fixes the battery topic for button automators (old kept for compatibility).

Additionally, you can now enable --fetch-device-info by setting env var FETCH_DEVICE_INFO to some non-empty value.
No need to change command anymore.

[matt8707]

That was fast! Yes, that works 👍🏻

  switchbot-mqtt:
    image: fphammerle/switchbot-mqtt:2.1.0-armv7
    container_name: switchbot-mqtt
    restart: always
    network_mode: host
    userns_mode: host
    cap_add:
      - NET_ADMIN
    cap_drop:
      - ALL
    user: '0'
    environment:
      - MQTT_HOST=${MQTT_HOST}
      - MQTT_PORT=${MQTT_PORT}
      - FETCH_DEVICE_INFO=yes

[fphammerle]

Great! Thanks for testing! :)

I'll remove that misleading cover/switchbot/*/battery-percentage topic in the next major release