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A02YYUW Waterproof Ultrasonic Distance Sensor

SKU: SEN0311

The A02YYUW Waterproof Ultrasonic Distance Sensor measures target distance via ultrasonic pulse time lapses. It offers a 4.5m range, supports 3.3~5V wide voltage, and uses only 8mA average current (powerable by most controllers’ IO ports). Its closed separated probe is waterproof/dustproof, suitable for harsh environments. Integrated signal processing allows direct distance reading via 9600bps UART. Compatible with Arduino, Raspberry Pi, it’s ideal for backing car annunciators, obstacle avoidance robots, and object detection projects.

Angled shot of waterproof ultrasonic distance sensor with wire and label.-DFRobot product sku:SEN0311 image.
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    • Specification

    Parameter Value
    Operating Voltage 3.3~5V
    Standby Current ≤5mA
    Average Current ≤8mA
    Blind Zone Distance 3cm
    Ranging Distance for Flat Object 3-450cm
    Output UART
    Response Time 100ms
    Probe Center Frequency 40K±1.0K
    Operating Temperature -15~60℃
    Storage Temperature -25~80℃
    Sensing Angle 60°
    Protection Rate IP67

    Pinout

    SEN0311 Pinout
    Label Name Description
    1 VCC Power Input
    2 GND Ground
    3 RX Processed Value/Real-time Value Output Selection
    4 TX UART Output

    FAQ

    • A02YYUW Waterproof Ultrasonic Sensor returns no data when connected to Raspberry Pi.

      Enter the following command in the Raspberry Pi terminal：

      sudo nano /boot/cmdline.txt

      Add dwc_otg.lpm_enable=0 as shown in the figure below, and delete console=serial0, 115200

      Open config.txt by enter:

      sudo nano /boot/config.txt

      and add dtoverlay=pi3-miniuart-bt

      Reboot and check, if there's still no data, try to add console=ttyl in cmdline.txt and reboot again.

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