EMS-ESP32/doc/ha/sensors.yaml

- platform: mqtt
  state_topic: 'home/boiler/thermostat_currtemp'
  name: 'Current Room Temperature'
  unit_of_measurement: '°C'

- platform: mqtt
  state_topic: 'home/boiler/thermostat_seltemp'
  name: 'Current Set Temperature'
  unit_of_measurement: '°C'

- platform: mqtt
  state_topic: 'home/boiler/thermostat_mode'
  name: 'Current Mode'

# last time boiler was started
- platform: template
  sensors:
    boiler_boottime:
      value_template: '{{ as_timestamp(states.automation.see_if_boiler_restarts.attributes.last_triggered) | timestamp_custom("%H:%M:%S %d/%m/%y") }}'

- platform: mqtt
  state_topic: 'home/boiler/showertime'
  name: 'Last shower duration'
  force_update: true
# unit_of_measurement: "minutes"
# value_template: '{{ states("sensor.last_shower_duration") | float / 60}}'

- platform: mqtt
  state_topic: 'home/boiler/boiler_data'
  name: 'Warm Water selected temperature'
  unit_of_measurement: '°C'
  value_template: '{{ value_json.wWSelTemp }}'

- platform: mqtt
  state_topic: 'home/boiler/boiler_data'
  name: 'Warm Water current temperature'
  unit_of_measurement: '°C'
  value_template: '{{ value_json.wWCurTmp }}'

- platform: mqtt
  state_topic: 'home/boiler/boiler_data'
  name: 'Warm Water activated'
  value_template: '{{ value_json.wWActivated }}'

- platform: mqtt
  state_topic: 'home/boiler/boiler_data'
  name: 'Warm Water 3-way valve'
  value_template: '{{ value_json.wWHeat }}'

- platform: mqtt
  state_topic: 'home/boiler/boiler_data'
  name: 'Current flow temperature'
  unit_of_measurement: '°C'
  value_template: '{{ value_json.curFlowTemp }}'

- platform: mqtt
  state_topic: 'home/boiler/boiler_data'
  name: 'Return temperature'
  unit_of_measurement: '°C'
  value_template: '{{ value_json.retTemp }}'

- platform: mqtt
  state_topic: 'home/boiler/boiler_data'
  name: 'Gas'
  value_template: '{{ value_json.burnGas }}'

- platform: mqtt
  state_topic: 'home/boiler/boiler_data'
  name: 'Boiler pump'
  value_template: '{{ value_json.heatPmp }}'

- platform: mqtt
  state_topic: 'home/boiler/boiler_data'
  name: 'Fan'
  value_template: '{{ value_json.fanWork }}'

- platform: mqtt
  state_topic: 'home/boiler/boiler_data'
  name: 'Ignition'
  value_template: '{{ value_json.ignWork }}'

- platform: mqtt
  state_topic: 'home/boiler/boiler_data'
  name: 'Circulation pump'
  value_template: '{{ value_json.wWCirc }}'

- platform: mqtt
  state_topic: 'home/boiler/boiler_data'
  name: 'Burner max power'
  unit_of_measurement: '%'
  value_template: '{{ value_json.selBurnPow }}'

- platform: mqtt
  state_topic: 'home/boiler/boiler_data'
  name: 'Burner max power'
  unit_of_measurement: '%'
  value_template: '{{ value_json.selBurnPow }}'

- platform: mqtt
  state_topic: 'home/boiler/boiler_data'
  name: 'Burner current power'
  unit_of_measurement: '%'
  value_template: '{{ value_json.curBurnPow }}'

- platform: mqtt
  state_topic: 'home/boiler/boiler_data'
  name: 'System Pressure'
  unit_of_measurement: 'bar'
  value_template: '{{ value_json.sysPress }}'

- platform: mqtt
  state_topic: 'home/boiler/boiler_data'
  name: 'Boiler temperature'
  unit_of_measurement: '°C'
  value_template: '{{ value_json.boilTemp }}'

- platform: mqtt
  state_topic: 'home/boiler/boiler_data'
  name: 'Pump modulation'
  unit_of_measurement: '%'
  value_template: '{{ value_json.pumpMod }}'

- platform: template
  sensors:
    showertime_time:
      value_template: '{{ as_timestamp(states.sensor.last_shower_duration.last_updated) | int | timestamp_custom("%-I:%M %P on %a %-d %b") }}'

    boiler_updated:
#     value_template: '{{ (as_timestamp(now()) - as_timestamp(states.sensor.boiler_temperature.last_updated)) | int | timestamp_custom("%-M min %-S seconds ago") }}'
      value_template: '{{ as_timestamp(states.sensor.boiler_temperature.last_updated) | timestamp_custom("%H:%M on %d/%b") }}'