Setting datetime on POPP / Danfoss Ally zigbee TRVs

automation.yaml

alias: Set Time On TRVs
description: ""
triggers:
  - trigger: time_pattern
    hours: "6"
    minutes: "0"
    seconds: "0"
conditions:
  - condition: time
    weekday:
      - thu
actions:
  - repeat:
      sequence:
        - action: mqtt.publish
          metadata: {}
          data:
            topic: zigbee2mqtt/{{ repeat.item }}/1/set
            payload: |-
              {"write":{"cluster":"genTime","options":{},"payload":{
                "time":{{ (utcnow().timestamp()-as_timestamp('2000-01-01T00:00:00'))|int }},
                "timeStatus":1,
                "timeZone":{{now().utcoffset().total_seconds()|int}},
                "dstStart":{{ (as_timestamp(states('sensor.daylight_savings_start'))-as_timestamp('2000-01-01T00:00:00'))|int }},
                "dstEnd":{{ (as_timestamp(states('sensor.daylight_savings_end'))-as_timestamp('2000-01-01T00:00:00'))|int }},
                "dstShift":{{ states('sensor.daylight_savings_offset')|int }}
              }}}
      for_each:
        - Office TRV
        - Basement TRV
mode: single

configuration.yaml

rest:
- resource_template: "https://www.timeapi.io/api/timezone/zone?timeZone={{ now().tzinfo }}"
  scan_interval: 86400
  sensor:
  - name: "Daylight Savings: Start"
    value_template: >
      {{ value_json.dstInterval.dstStart | as_datetime }}
    device_class: timestamp

  - name: "Daylight Savings: End"
    value_template: >
      {{ value_json.dstInterval.dstEnd | as_datetime }}
    device_class: timestamp

  - name: "Daylight Savings: Offset"
    value_template: >
      {{ value_json.dstInterval.dstOffsetToStandardTime.seconds | int }}
    unit_of_measurement: seconds

Not needed anymore since Zigbee2MQTT has timesetting functionality built in.