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SunFounder Robot HAT Series

Welcome to the Robot HAT Series Documentation

The Robot HAT Series is a collection of powerful and developer-friendly expansion boards designed to unlock the full potential of the Raspberry Pi in robotics and automation projects. Whether you’re an educator, maker, or professional developer, the Robot HAT series provides the essential hardware foundation to rapidly build smart, interactive robots—from autonomous vehicles to voice-controlled assistants.

Each board in the series features an onboard MCU, extending the Raspberry Pi’s capabilities with additional PWM outputs and ADC inputs. Integrated motor drivers, audio modules, and user-friendly debugging features make development smoother and more efficient. From basic motion control to advanced voice interaction, the Robot HAT series grows with your project needs.

Key Features Across the Series:

• Microcontroller-based control for enhanced PWM/ADC support

• Motor drivers for flexible mobility

• Built-in I2S audio and mono speaker for sound interaction

• Customizable I/O interfaces for easy sensor and actuator integration

• Smart power design with status LEDs, user button, and expansion-ready layout

What’s New in Robot HAT V5:

• Onboard microphone for voice recognition and audio input

• Dedicated ZERO button for fast servo alignment

• Enhanced hardware stability and usability

Explore the documentation for each version to get started with setup, hardware details, and software integration:

• About this HAT
• Robot HAT V4
  • Features
  • Hardware Introduction
    • Pinout
    • Pin Mapping
    • Digital IO
    • ADC
    • PWM
    • I2C
    • SPI
    • UART
    • Buttons
    • Speaker and Speaker Port
    • Motor Port
    • Battery Level Indicator
  • On-Board MCU
    • Introduce
    • ADC
    • PWM
    • Reset MCU
  • About the Battery
• Robot HAT V5
  • Features
  • Hardware Introduction
    • Pinout
    • Pin Mapping
    • Digital IO
    • ADC
    • PWM
    • I2C
    • SPI
    • UART
    • WS2812 Port
    • Buttons
    • Speaker and MIC
    • Motor Port
    • Battery Level Indicator
    • Servo Zeroing Button
  • On-Board MCU
    • Introduce
    • ADC
    • PWM
    • Reset MCU
  • About the Battery
• Install the robot-hat Module
• Install i2samp.sh for the Speaker
• Reference
  • class Pin
  • class ADC
  • class PWM
  • class Servo
  • module motor
    • class Motors
    • class Motor
  • module modules
    • class Ultrasonic
    • class ADXL345
    • class RGB_LED
    • class Buzzer
    • class Grayscale_Module
  • class Robot
  • class Music
  • class TTS
  • module utils
  • class FileDB
  • class I2C
  • class _Basic_class
• Some Projects
  • Control Servos and Motors
  • DIY Car
  • Read from Photoresistor Module
  • Read from Ultrasonic Module
  • Plant Monitor
  • Say Something
  • Security System
  • Community Tutorials
• FAQ
  • Q1: Can the battery be connected while providing power to the Raspberry Pi at the same time?
  • Q2: Can the Robot HAT be used while charging?
  • Q3: Why is there no sound from the speaker?

In this document, you will get a full understanding of the interface functions of the Robot HAT and the usage of these interfaces through the Python robot-hat library provided by SunFounder.

Let the Robot HAT Series be your gateway to building the next generation of intelligent robotic systems.