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IO Expansion Shields & HATs

Gravity: I/O Expansion Shield

SKU: DFR0578

The Gravity I/O Expansion Shield is designed to expand the capabilities of OpenMV boards by providing multiple connectivity options including digital, analog, UART, and I2C ports. With its standard Gravity series connectors, it offers a high level of flexibility for connecting various modules and components. Key specifications include a 5V external power supply, 3.3V interface signal levels, and support for high current components. Users can select power supply voltage for specific ports via an onboard switch. The shield is compact in size and ensures easy integration with OpenMV motherboards, making it an ideal choice for enhancing project versatility and efficiency.

Front of OpenMV Expansion Shield with I/O pins-DFRobot product sku:DFR0578 image.

Downloadable Resources

  • Docs
  • Tech Specs

    • Specification

    Parameter Value
    External Power Supply Voltage (onboard USB port) 5.0±0.1V
    External Power Input Current (onboard USB port) <1A
    Connector Gravity series standard connector
    Ports 9 sets of digital ports, 1 set of analog port, 1 set of serial port, 2 sets of I2C ports
    Interface Signal Level High Level 3.3V, Low Level 0V
    Analog Input Range 0~3.3V
    Onboard LDO Output Voltage 3.3V
    Onboard LDO Output Current <500mA
    Board Size 35.6mm * 24.8mm

    Pinout

    Num Label Description
    1 Digital Port connect to Gravity series digital modules
    power supply voltage of the port:3.3V
    Pin:P0~P5
    2 Power Switch choose the power supply voltage of P7,P8,P9 ports, 3.3V or VIN(external power supply)
    3 Reset Button reset the OpenMV
    4 Digital Port
    (High Current)    		 drive high current components such as motors and servos
    power supply voltage of the port: 3.3V or VIN (can be selected by the power switch)
    Pin:P7,P8,P9
    5 UART Port connect to Gravity series UART modules
    power supply voltage of the port:3.3V
    Pin:P0,P1（UART 1）
    6 External Power Port connect to the external power supply
    input voltage:5V
    7 Analog Port connect to Gravity series analog modules
    power supply voltage of the port:3.3V
    Pin:P6
    8 I2C Port connect to Gravity series I2C modules
    power supply voltage of the port:3.3V
    Pin:P4,P5（I2C 2）

    When put the expansion shield on the OpenMV motherboard, please pay attention to the direction. The USB port of the expansion shield should be on the same side as the USB port of the OpenMV motherboard.

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