Resources
Product wiki

IO Expansion HAT For Raspberry Pi 5, Raspberry Pi 4B, and Raspberry Pi 3B Plus With Gravity Interface Support
The IO Expansion HAT for Raspberry Pi 5, Raspberry Pi 4B, and Raspberry Pi 3B+ is a versatile expansion board designed to simplify hardware development and peripheral integration. The HAT brings out all major Raspberry Pi interfaces, including digital IO, analog input, PWM, I2C, UART, SPI, and IIS, allowing developers to easily connect sensors, actuators, displays, communication modules, and other external devices. It provides a convenient development platform for prototyping, educational projects, robotics, automation systems, and IoT applications.
Fully compatible with the DFRobot Gravity ecosystem, the expansion HAT eliminates complex wiring requirements and enables quick plug-and-play connections with a wide range of Gravity sensors and modules. This streamlined design allows users to focus on project development rather than hardware connections. Whether used for learning, rapid prototyping, or advanced embedded system development, the HAT significantly expands the capabilities of Raspberry Pi platforms while maintaining an organized and reliable hardware setup.
Key Features

Compatible with Raspberry Pi 5: Designed for seamless integration.
Supports Raspberry Pi 4B and 3B+: Broad Raspberry Pi compatibility.
Digital IO Expansion: Access to Raspberry Pi digital interfaces.
Analog Interface Support: Simplifies analog sensor connectivity.
PWM Output Support: Suitable for motor and servo control applications.
I2C Interface Expansion: Easy connection of multiple I2C devices.
UART Communication Support: Enables serial device integration.
SPI Interface Access: Supports high-speed peripheral communication.
IIS Audio Interface: Suitable for audio-related applications.
Gravity Ecosystem Compatible: Plug-and-play support for Gravity modules.
Simplified Wiring: Reduces development complexity and cable clutter.
Rapid Prototyping Platform: Accelerates project development.

Applications

Raspberry Pi prototyping
IoT development projects
Robotics systems
Smart home automation
Sensor integration platforms
Educational electronics projects
Industrial monitoring systems
Embedded system development
Data acquisition systems
Motor and servo control projects
Environmental monitoring stations
STEM learning applications

Pinouts

Raspberry Pi GPIO pins work with a maximum logic level of 3.3V. Besides the sensor and module of 3.3V power supply, the product also supports:

Sensor and module with 5V power supply and 3.3V level
PWM external power supply (6~12V)
Controlling multiple servos

IO Expansion HAT Dimensions

Package List:

IO Expansion HAT for Raspberry Pi 4B/3B+ x1