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IO Expansion Board

SKU: DFR0371

Say goodbye to messy cables! This IO shield is a powerful expansion for Bluno M3, with D0-D38 breakouts (5 UARTS, 8 PWM, 8 analog pins). It uses a color-coded 3-pin format (signal/voltage/ground) for device compatibility. Integrated external servo power connectors (auto power switching) and an intelligent regulator let you connect battery+USB simultaneously. An on-board voltage switch supports 3.3V/5V sensors.

Angled shot of Gravity IO shield with multiple connectors for Arduino M3 expansion.-DFRobot product sku:DFR0371 image.
  • Docs
  • Tech Specs

    • Specification

    • Interface:
    Interface Feature Details
    GPIO pins 39 with color-coded headers
    PWM pins 8
    Analog Input pins 8
    UARTS 5
    I2C/IIC 1
    SPI 1
    External power connector For servos
    Power switch 3.3V/5V
    • Dimensions: 69mm * 54mm

    Pinout

    <File:DFR0371_Pinout.png>

    Num. Name Description
    1 Servo Power Port 5-12V
    2 External Power Port 7-12V
    3 3.3V/5V Operating Voltage Switch Select output voltage
    4 Reset Button -
    5 UARTS and I2C -
    6 Analog Input Ports Black: GND;
    Red: 5V;
    Blue: Analog Input pins (0~7)
    7 SPI -
    8 I/O Voltage Instruction Silk-Screen:
    White background: supports 5V;
    Black background supports 3.3V only
    9 Digital I/O ports Black: GND;
    Red: 5V;
    Green: Digital I/O pins (0~38)

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