SRF02 Ultrasonic Distance Sensor (16~600cm)

SKU: SEN0005

The SRF02 is a single-transducer ultrasonic rangefinder with I2C and Serial (TTL UART, 9600 baud, 1 start, 2 stop, no parity) interfaces. Up to 16 units connect on one bus. It supports new commands (burst without reception, reception without burst) and measures in uS, cm, or inches. Min range is ~15-18cm (varies by temp), higher than dual-transducer models.

Angled shot of black circular SRF02 ultrasonic sensor mounted on green circuit board with gold pins-DFRobot product sku:SEN0005 image.
  • Docs
  • Tech Specs
  • Specification

    Parameter Details
    Range 16cm to 6m
    Power 5v, 4mA Typ.
    Frequency 40KHz
    Size 24mm x 20mm x 17mm height
    Analogue Gain Automatic 64 step gain control
    Connection Modes 1 - Standard I2C Bus 2 - Serial Bus(connects up to 16 devices to any uP or UART serial port)
    Full Automatic Tuning No calibration, just power up and go
    Timing Fully timed echo, freeing host controller of task.
    Units Range reported in uS, mm or inches.
    Light Weight 4.6gm

    Pinout

    SEN0005 SRF02 ultrasonic sensor Pin Function

    "Mode" pin: Select the communication between MCU and SRF02 Ultrasonic sensor. It has an internal pull-up resistor.

    • When in IIC mode, the "Mode" pin should be left unconnected.
    • When in UART mode, it must be connected to GND.

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