Calculate cumulative on-time on for a switch

[123 (Taras)]

Create a Template Sensor plus History Stats sensor. Add Utility Meter sensors for long-term fata (daily/weekly/monthly/yearly).

Sensor for 'how long was heating on today'?

Create a Template Sensor using either the new format: template: - sensor: - name: HVAC Activity state: "{{ state_attr('climate.living_room', 'hvac_action') }}" or the old format: sensors: - platform: template sensors: hvac_activity: friendly_name: 'HVAC Activity' value_template: "{{ state_attr('climate.living_room', 'hvac_action') }}" Reference the Template Sensor in the History Stats Sensor: - platform: history_stats name: Heating Today entit…