An I/O expansion HAT for Raspberry Pi 4B and 3B+ that breaks out all GPIO pins into clearly labelled digital, analogue, PWM, I2C, UART, SPI, and I2S interfaces. The board is compatible with DFRobot Gravity series sensors and modules, allowing plug-and-play connections without complex wiring.

The HAT supports both 3.3 V and 5 V sensors (with 3.3 V logic level), and includes an external power input (6–12 V) for the PWM ports, making it suitable for driving multiple servos directly from the board.

Key Features

• Full GPIO Breakout – Digital, analogue, PWM, I2C, UART, SPI, and I2S ports
• Gravity Compatible – Plug-and-play with DFRobot Gravity series sensors
• Dual Voltage Support – 3.3 V and 5 V sensor interfaces
• PWM External Power – 6–12 V input for servo control
• Raspberry Pi HAT Format – Plugs directly onto the 2×20 GPIO header

Specifications

• Operating Voltage – 5 V
• PWM External Power – 6–12 V
• Sensor Interface Voltage – 3.3 V
• Dimensions – 65 × 56 mm
• Compatibility – Raspberry Pi 4B, 3B+

Ideal For

• Connecting multiple Gravity sensors to Raspberry Pi
• Servo control projects with external power
• Prototyping IoT and automation systems

Package Contents

• 1× IO Expansion HAT for Raspberry Pi

Resources

• Product Wiki