SCD4X CO₂, Temperature and Relative Humidity Sensor

The scd4x sensor platform allows you to use your Sensirion SCD4X CO₂ (datasheet) sensors with ESPHome. The I²C Bus is required to be set up in your configuration for this sensor to work.

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# Example configuration entry
sensor:
  - platform: scd4x
    co2:
      name: "Workshop CO2"
    temperature:
      name: "Workshop Temperature"
    humidity:
      name: "Workshop Humidity"

Configuration variables:

  • co2 (Optional): The information for the CO₂ sensor.

    • name (Required, string): The name for the CO₂eq sensor.

    • id (Optional, ID): Set the ID of this sensor for use in lambdas.

    • All other options from Sensor.

  • temperature (Optional): The information for the Temperature sensor.

    • name (Required, string): The name for the temperature sensor.

    • id (Optional, ID): Set the ID of this sensor for use in lambdas.

    • All other options from Sensor.

  • humidity (Optional): The information for the Humidity sensor.

    • name (Required, string): The name for the humidity sensor.

    • id (Optional, ID): Set the ID of this sensor for use in lambdas.

    • All other options from Sensor.

  • temperature_offset (Optional, float): The temperature offset can depend on various factors such as the SCD4x measurement mode, self-heating of close components, the ambient temperature and air flow. This variable allows the compensation of those effects by setting a temperature offset. Defaults to 4°C.

  • automatic_self_calibration (Optional, boolean): Whether to enable automatic self calibration (ASC). Defaults to true.

  • ambient_pressure_compensation (Optional, int): Enable compensation of measured CO₂ values based on given ambient pressure in mBar.

  • altitude_compensation (Optional, int): Enable compensating deviations due to current altitude (in metres). Notice: setting altitude_compensation is ignored if ambient_pressure_compensation is set.

  • address (Optional, int): Manually specify the I²C address of the sensor. Defaults to 0x62.

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

See Also