Step 2: Create MQTT Trigger in Home Assistant alias: MQTT Trigger for Presence Sensor description: "" triggers: - trigger: state entity_id: - binary_sensor.human_detector conditions: [] actions: - action: mqtt.publish metadata: {} data: evaluate_payload: false qos: 0 retain: false topic: entities/{{trigger.to_state.object_id}}/state_change payload: "{{trigger.from_state.state}}|{{trigger.to_state.state}}" mode: single The payload contains the old and new state.