Found this post about it on the zigbee2mqtt github.
It seems to have happened when zigbee2mqtt was updated.
There are two options:
- upgrade firmware of the coordinator (seems to be the difficult route)
- use an external converter for the Aqara T1 relay module
Pleased to say that I could get it working with an external converter. Will use that for now and save upgrading the coordinator for rainy day.
Here is a working external converter.
Adding external converter: More configuration options | Zigbee2MQTT
The data directory of zigbee2mqtt is normally in /config/zigbee2mqtt (same as z2m’s configuration.yaml). Good luck, hope it works out for you!