AlexxIT
Sonoff TH10 thermostat mode broken in latest firmware (2025.7.3)
Hi, I'm using a Sonoff TH10 with the latest firmware (2025.7.3), and the thermostat function seems to be broken when using it via SonoffLAN in Home Assistant.
On firmware 5.3, everything worked as expected:
The relay switched on/off based on the temperature
Hysteresis logic worked correctly (e.g. off at 23°C, on at 21°C)
After updating to 2025.7.3, the device:
no longer responds to temperature thresholds reliably,
sometimes doesn't turn off at the set temperature,
and generally doesn't behave like a thermostat anymore.
The strange part: in the eWeLink app, it still works correctly, which suggests the issue is with SonoffLAN not matching changes in the firmware or API.
Would be great if you could look into it. Thanks for your work so far — this integration is otherwise amazing. 👍
