I use the generic thermostat but I want to switch the TRVs to different temperatures/states depending on a schedule and if we are at home or not. The automation changed over the last 3 or 4 years but basicly it was one of my first experiments with HA. It worked flawless and did what it should.

Maybe it’s not the best or refined but it worked.

triggers:
  - entity_id:
      - sensor.wohnzimmer_temp
    trigger: state
conditions:
  - condition: and
    conditions:
      - condition: state
        state: "off"
        entity_id: binary_sensor.balkontur_contact
      - condition: state
        entity_id: input_boolean.wohnzimmer_heizung
        state: "on"
      - condition: template
        value_template: >-
          {% if states('input_boolean.away_mode')=='off' %} {% if
          states('schedule.testkalender')=='on' %} {{
          states('sensor.wohnzimmer_temp') | float <
          states('input_number.wohnzimmer_temperatur_tag') | float + 1 }} {%
          else %} {{ states('sensor.wohnzimmer_temp') | float <
          states('input_number.wohnzimmer_temperatur_nacht') | float + 1 }} {%
          endif %} {% else %} {{ (states('sensor.wohnzimmer_temp') | float) |
          round  < states('input_number.temperatur_away_mode') | float + 1 }} {%
          endif %}
        enabled: true
actions:
  - action: climate.set_temperature
    target:
      entity_id: climate.heizung_wohnzimmer
    data:
      temperature: |
        {% if states('schedule.testkalender')=='on' %}
          {{ states('input_number.wohnzimmer_temperatur_tag') | int + states('input_number.wohnzimmer_heizung_offset') | int }}
        {% else %}
          {{ states('input_number.wohnzimmer_temperatur_nacht') | int }}
        {% endif %}
      hvac_mode: |
        {% if states('input_boolean.away_mode')=='off' %}
          {% if states('schedule.testkalender')=='on' %}
            {% if states('sensor.wohnzimmer_temp') | float < states('input_number.wohnzimmer_temperatur_tag') | float %}
              heat
            {% else %}
              off
            {% endif %}
          {% else %}
            {% if states('sensor.wohnzimmer_temp') | float < states('input_number.wohnzimmer_temperatur_nacht') | float %}
              heat
            {% else %}
              off
            {% endif %}
          {% endif %}
        {% else %}
          {% if states('sensor.wohnzimmer_temp') | float < states('input_number.temperatur_away_mode') | float %}
            heat
          {% else %}
            off
          {% endif %}
        {% endif %}       
mode: single

They are Sonoff TRVZB. Bosch changed the firmware and with 3.7.4 the TRVs startet to recalibrate and reboot at random times. Sometimes 15 minutes in a row. Bosch said: Thats your valves, change them, not our fault.