URM04 Ultrasonic Distance and Temperature Sensor

SKU: SEN0002

URM04 Ultrasonic Distance and Temperature Sensor is developed based on URM37. It uses RS485 interface, supporting up to 32 sensors networking together. It offers a 4cm-500cm detecting range and 1cm resolution.

Angled shot of back of URM04 ultrasonic sensor with RS485 interface and yellow connectors-DFRobot product sku:SEN0002 image.
  • Docs
  • Tech Specs
  • Specification

    Parameter Value
    Power +5V
    Current < 20mA
    Working temperature -10℃~+70℃
    Detecting range 4cm-500cm
    Resolution 1cm
    Frequency 40KHz
    Interface RS485
    Units Range reported in cm
    Temperature sensor 12 bits reading from serial port
    Size 34mm × 51 mm
    Weight 30g
    Default Address 0x11
    Default Baudrate 19200

    Pinout

    pinout1
    pinout2

    • RS485 Interface:Two connectors
    • +: +5V DC Power +5V
    • -: GND Ground
    • A: A RS485 A(+)
    • B: B RS485 B(-)
    • ISP Pin: For factory firmware uploading
    • Communication LED: As the device is powered up, this LED will flash four times which indicates that the sensor is working properly. This LED will also flash when it is communcating with other devices.
      • Jumper A: Not in use
      • Jumper B: When the sensor is working under a network, only the Jumper B for the first Device and the last Device need to be bridged.

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