Firmware 1.0.5 for the Sonoff TP-WGZBA thermostat enters Zigpy’s update collection with a correction for scheduled heating falling back to five degrees Celsius at midnight. That value is the thermostat’s frost-protection setting.
The update also improves temperature compensation so switching the heating relay does not make the reported temperature jump by 0.5 to 1.6 degrees. The submitted firmware was tested on the device.