Belling BL0940 Energy Monitor


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The bl0940 sensor platform allows you to use BL0940 energy monitors sensors with ESPHome. These are used in some Tuya-devices (e.g. the power metering BW-SHP10)

The communication with this component is done via a UART. You must therefore have a uart: entry in your configuration with both the TX and RX pins set to some pins on your board and the baud rate set to 4800 with 1 stop bit.

# Example configuration entry
  id: uart_bus
  tx_pin: TX
  rx_pin: RX
  baud_rate: 4800
  stop_bits: 1

  - platform: bl0940
    uart_id: uart_bus
      name: 'BL0940 Voltage'
      name: 'BL0940 Current'
      name: 'BL0940 Power'
      name: 'BL0940 Energy'
      name: 'BL0940 Internal temperature'
      name: 'BL0940 External temperature'
    update_interval: 60s

Configuration variables:

  • voltage (Optional): The voltage value of the sensor in Volts. All options from Sensor.

  • current (Optional): The current value of the sensor in Amperes. All options from Sensor.

  • power (Optional): The (active) power value of the sensor in Watts. All options from Sensor.

  • energy (Optional): Use the voltage value of the sensor in kWh. All options from Sensor.

  • internal_temperature (Optional): The internal temperature value of the sensor in °C. All options from Sensor.

  • external_temperature (Optional): The external value of the sensor in °C. Often not connected and gives garbage data. All options from Sensor.

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

  • uart_id (Optional, ID): Manually specify the ID of the UART Component if you want to use multiple UART buses.

See Also