After 3 years, out of nowhere, my IKEA Zigbee lights decided they will randomly set their brightness to 1. This happens at random times and when turning them on. No idea why, no will to go fix it at the source.
The old brightness_fixer.py script monitors the brightness of the lights via
Zigbee2MQTT and sets it back to the previous value if the lights are on and the
brightness is 1.
I since discovered that the problem is due to the fact that, on some lights, for
some unknown reason, the onLevel attribute of the genLevelCtrl cluster is
reset to 0 when reconnecting power to the light, and sometimes even randomly
when the light is on. More
info here.
The new on_level_fixer.py script implements the workaround
suggested here
and it sets the onLevel attribute back to 255 (previous value) when the
light
is detected the first time, then automatically when it changes to any other
value 255.
For this to work you must enable the reporting of the onLevel attribute; you
can configure it to something like this:
- Endpoint:
1 - Cluster:
LevelCtrl - Attribute:
onLevel - Min rep interval:
60 - Max rep interval:
300 - Min rep change:
1