Dear community,
Recently I bought a few Tuya Zigbee TRV’s that I installed on 3 of my radiators and work quite well. I iinstalled them via Zigbee2MQTT and they automatically generated the following entities (with their respective current values):
binary_sensor.trv_big_right_battery_low off
climate.trv_big_right off
lock.trv_big_right_child_lock unlocked
number.trv_big_right_boost_timeset_countdown 0
number.trv_big_right_comfort_temperature 21
number.trv_big_right_eco_temperature 17
number.trv_big_right_holiday_temperature 17
number.trv_big_right_local_temperature_calibration 0
number.trv_big_right_open_window_temperature 21
select.trv_big_right_working_day mon_sun
sensor.trv_big_right_error_status 0
sensor.trv_big_right_schedule_friday 06:00/17 12:00/21 14:00/17 17:00/21 24:00/17
sensor.trv_big_right_schedule_monday 06:00/17 12:00/21 14:00/17 17:00/21 24:00/17
sensor.trv_big_right_schedule_saturday 06:00/17 12:00/21 14:00/17 17:00/21 24:00/17
sensor.trv_big_right_schedule_sunday 06:00/17 12:00/21 14:00/17 17:00/21 24:00/17
sensor.trv_big_right_schedule_thursday 06:00/17 12:00/21 14:00/17 17:00/21 24:00/17
sensor.trv_big_right_schedule_tuesday 06:00/17 12:00/21 14:00/17 17:00/21 24:00/17
sensor.trv_big_right_schedule_wednesday 06:00/17 12:00/21 14:00/17 17:00/21 24:00/17
switch.trv_big_right_frost_protection off
switch.trv_big_right_heating_stop on
switch.trv_big_right_online on
switch.trv_big_right_open_window off
text.trv_big_right_holiday_start_stop 2021/01/01 01:01 | 2021/01/01 01:01
update.trv_big_right off
I started by setting them on manual mode at 22 °C.
The problem that I am facing is that, they are using their own internal temperature sensors and, because of this reason, the thermometers installed in the respective rooms (at around 1.5 m above the floor and about 2 meters away from the radiators) show anything between 20.5 and 23.5 °C. Clearly, either the TRV’s have a rather big (over 1 °C) hysteresis, either their sensors are greatly impacted by the heat they generate. Looking over historic data the temperature oscillations were less than +/- 1 °C while using the old, mechanical TRV’s.
Given the above exposed entities, what could I do in order for my HA powered thermostats to use the external thermometers instead the ones integrated in the TRV’s. Or at least limit the temperature variations.
The point of these TRV’s is to create a few automations that would help me save some energy: automatic vacation mode, day/night schedules, turn off heating in case of window open, etc.
Thank you for your help!