SDS011 Particulate Matter Sensor

The sds011 sensor platform allows you to use SDS011 particulate matter sensors (datasheet) with ESPHome.

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SDS011 Particulate Matter Sensor

As the communication with the SDS011 is done using UART, you need to have an UART bus in your configuration with the rx_pin connected to the TX pin of the SDS011 and optionally the tx_pin connected to the RX Pin of the SDS011 (it’s switched because the TX/RX labels are from the perspective of the individual device). Additionally, you need to set the baud rate to 9600.

# Example configuration entry
uart:
  rx_pin: D0
  tx_pin: D1
  baud_rate: 9600

sensor:
  - platform: sds011
    pm_2_5:
      name: "Particulate Matter <2.5µm Concentration"
    pm_10_0:
      name: "Particulate Matter <10.0µm Concentration"
    update_interval: 5min

With update_interval, the working period of the SDS011 device will be changed. If update_interval is equal to 0min, the SDS011 will be set to continuous measurement and will report new measurement values approximately every second.

If update_interval is between 1-30 minutes, the SDS011 periodically turns on for 30s before each measurement. For the remaining time the sensor is shut off. As a result, this mode can reduce power consumption and increases the lifetime of the SDS011.

Configuration variables:

  • pm_2_5 (Optional): Use the concentration of particulates of size less than 2.5µm in µg per cubic meter. All options from Sensor.
  • pm_10_0 (Optional): Use the concentration of particulates of size less than 10.0µm in µg per cubic meter. All options from Sensor.
  • update_interval (Optional, Time): The interval to check the sensor in minutes. This affects the working period of the SDS011 sensor. Defaults to 0min.
  • rx_only (Optional, boolean): Whether the sensor is connected only by RX pin to the UART bus. Since the SDS011 can not be configured in RX-only mode, update_interval has no effect and the sensor must be configured separately. Defaults to false.
  • uart_id (Optional, ID): Manually specify the ID of the UART Component if you want to use multiple UART buses.

Note

The configuration variable update_interval reconfigure the SDS011 device. This setting is still effective after power off. This can affect the performance of other libraries. Factory default is continuous measurement.