Aquara E1 heating value differences

[PrzemekEsteves]

Hi, I'm using Aquara E1 thermostat via Zigbee with external sensor since the one in thermostat does not update temperature often.
Once installed better thermo external sensor is working fine but heating value on thermostat is always 2*C lower than the one set in better thermo see picture below. Is there any way to fix this?
On screen both are the same thermostat, one is better ui card (tried also just basic card from better thermo), and card below is basic card from thermostat

[folfy]

That's how BT works - It offsets the error of your thermostats temperature sensor. If you set 24°C, your room has 21.2°, but your TRV thinks it's 19.3°, BT will set 24° + (19.3° - 21.2°) = 22° (rounded down).

If you don't want BT to apply calibration, choose the "no calibration" mode in the configuration flow of your entity / thermostat.