I switched to beta firmware in Aqara app and installed the new firmware ZigBee 0.0.0_2644. It was only possible to install the new firmware with resetting W600 install Matter protocol and then back to ZigBee.
The new firmware works as aspected, also with combination with T1 sensor.
Hi you can try to Reset the W600. Take 1 Battery out off the Thermostate. Reinsert and Recalibrate. Also you can Compensate the Temperature in the App. Hope this helps
I asked the Aqara Technical Support three weeks ago and their answer is basically „no“.
“Regarding your question about updating the Zigbee firmware without an Aqara hub, unfortunately, firmware updates for the W600 in Zigbee mode require an Aqara Zigbee 3.0 gateway (with version 4.3.8 or higher). The protocol switching (between Zigbee and Thread) does not trigger a firmware update.“
So you either need an Aqara Hub or use Zigbee2MQTT.
The latest update has not been successful for me.
Schedules don’t work.
2 do not reach the temperatures. One heats up all the time, above the set temperature.
All devices reset but no success.