MiCS 4514 Gas Sensor

This component exposes the different gas concentration sensors from the MiCS-4514. This is a differnet sensor than the MICS-4514 being sold on AliExpress.


The sensor has a 3-minute warmup period where data is unreliable and ESPHome will only start publishing sensor values after this time. If the sensor was already powered only, such as if you restarted or updated your ESPHome device, then it will start publishing immediately.

The I²C Bus is required to be set up in your configuration for this sensor to work.

# Example configuration entry
  - platform: mics_4514
      name: Nitrogen Dioxide
      name: Carbon Monoxide
      name: Hydrogen
      name: Ethanol
      name: Methane
      name: Ammonia
    update_interval: 60s

Configuration variables:

  • nitrogen_dioxide (Optional): All options from Sensor

  • carbon_monoxide (Optional): All options from Sensor

  • hydrogen (Optional): All options from Sensor

  • ethanol (Optional): All options from Sensor

  • methane (Optional): All options from Sensor

  • ammonia (Optional): All options from Sensor

  • update_interval (Optional, Time): The interval to check the sensor. Defaults to 60s.

See Also