Tired of messy wires or breadboard chaos when prototyping with Arduino? The Gravity IO Expansion Shield for Arduino V7.1 provides a clean, modular, and beginner-friendly solution. Designed by DFRobot, this shield supports plug-and-play connectivity with Gravity modules, using clearly labeled ports and color-coded headers for analog, digital, and I2C interfaces.
Fully compatible with Arduino UNO R3 and UNO R4, this expansion shield allows seamless integration of wireless modules (like Xbee, Bluetooth, RS485 ), servo power management, and even SD card communication. You can also use non-Gravity modules with standard DuPont jumper wires.
Key Features
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3.3V / 5V voltage select for wide compatibility
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UART toggle switch to enable programming and communication modes
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Clearly labeled, color-coded ports for fast and accurate wiring
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Compatible with Xbee, RS485, URM04, APC220, and more
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Gold-plated PCB surface for long-term reliability
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Enhances expansion capability of your Arduino projects
Specifications
| Parameter | Details |
|---|---|
| Input Voltage | 7–12V via PWR_IN pin |
| Servo Power Input | 4.8–6V via SERVO_PWR |
| Compatible Module Voltage | 3.3V / 5V (selectable) |
| Supported Interfaces | I2C, SPI, Xbee, Bluetooth, APC220 |
Board Overview
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SD card slot
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I2C port
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UART toggle switch
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Analog and digital interface rows
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Bluetooth/Xbee slot
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External power terminal
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RS485 interface and jumper switch
![](data:image/svg+xml;charset=utf-8,<svg height="739px" width="900px" xmlns="http://www.w3.org/2000/svg" version="1.1"/>)
Shipping List
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1 × IO Expansion Shield for Arduino V7.1
Project Applications
This board is used in many real-world projects, including:
1.2M MechaGodzilla Armor Suit (with EVA & Gears) – Build wearable robotic suits with servo control
2.Spectrophotometer with AS7341 Sensor – Conduct experiments measuring substance concentration
![](data:image/svg+xml;charset=utf-8,<svg height="1080px" width="1440px" xmlns="http://www.w3.org/2000/svg" version="1.1"/>)
3.Smart Rock-Paper-Scissors Robot – Build a reactive robot using gesture recognition
4.Automatic Water Quality Monitor (KnowFlow) – Monitor pH, EC, ORP, and more
![](data:image/svg+xml;charset=utf-8,<svg height="343px" width="531px" xmlns="http://www.w3.org/2000/svg" version="1.1"/>)
5.Automatic Water-Changing System – Combine sensors and pumps for environmental automation
![](data:image/svg+xml;charset=utf-8,<svg height="360px" width="749px" xmlns="http://www.w3.org/2000/svg" version="1.1"/>)
Compatible with Other Development Boards
If you're using ESP32, micro:bit, or Raspberry Pi Pico, DFRobot offers tailored IO expansion boards:
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Arduino Mega 2560: Gravity IO Sensor Shield
![](data:image/svg+xml;charset=utf-8,<svg height="813px" width="1220px" xmlns="http://www.w3.org/2000/svg" version="1.1"/>)
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micro:bit: IO Extender for micro:bit
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Raspberry Pi Pico: Gravity IO Expansion Board
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FireBeetle 2 ESP32-E: IO Shield for FireBeetle 2