# RF open/close sensor Open/close sensor on ATmega168/328 + RF24. ## Features 1. Power consumption in sleep mode approximately 10 μA. Up to 2 years of operation on one CR2450 battery (estimated). 2. When triggered transmits the battery level charge and contact status (OPEN/CLOSE). 3. Can be used with normally closed and normally open contacts. 4. Automatic restart in case of a hang-up. ## Note A gateway is required. For details see "RF - ESP-NOW Gateway". ## Full config example for Home Assistant ```yml mqtt: sensor: - name: "NAME" device_class: "voltage" unit_of_measurement: "V" state_topic: "homeassistant/rf_sensor/ID/open_close" value_template: "{{ value_json.battery }}" force_update: true qos: 2 binary_sensor: - name: "NAME" device_class: "door" state_topic: "homeassistant/rf_sensor/ID/open_close" value_template: "{{ value_json.state }}" payload_on: "OPEN" payload_off: "CLOSE" force_update: true qos: 2 ```