HRXL MaxSonar WR Series

This sensor allows you to use HRXL MaxSonar WR series ultrasonic sensors by MaxBotix (datasheet) with ESPHome to measure distances. Depending on the model, these sensors can measure in a range between 30 centimeters and 10 meters.

This sensor platform works with the TTL versions of those sensors and expects the sensor’s TTL pin to be wired to one of the ESP’s input pins. Since these sensors read multiple times per second, filtering is highly recommended.


MB7388 HRXL-MaxSonar-WRMLT Ultrasonic Distance Sensor.

# Example configuration entry
  rx_pin: 36
  baud_rate: 9600

  - platform: "hrxl_maxsonar_wr"
    name: "Rainwater Tank"
    # Tweak the filters for your application
      - sliding_window_moving_average:
          window_size: 12
          send_every: 12
      - or:
        - throttle: "20min"
        - delta: 0.02

Configuration variables:

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

  • All other options from Sensor.

Advanced options:

  • uart_id (Optional, ID): The ID of the UART bus you wish to use for this sensor. Use this if you want to use multiple UART buses at once.

See Also