SunFounder Fusion HAT+ for Raspberry Pi 5/4/3B+ and Zero single board computers is a motor control and GPIO expansion board designed to work with LLMs such as ChatGPT or Gemini using the board’s built-in speaker and microphone for voice interaction.
It features four DC motor drivers, twelve PWM servo channels, four ADC inputs, I2C, SPI, and UART interface for sensors, and ships with two 18650 rechargeable batteries with smart power management & safe shutdown. It can be used in smart cars, humanoid robots, robotic arms, multi-legged spiders, and smart home systems.
Fusion HAT+ specifications:
- MCU – Gigadevices GD32E203C8T6 Arm Cortex-M23 microcontroller @ 72MHz with 64KB flash, 8KB SRAM.
- Motor control – 4x motor ports
- Audio
- 2030 audio chamber speaker connected to an I2S audio port
- MEMS microphone
- Expansion
- 4-channel digital pins
- 4-pin I2C interface compatible with Qwiic/STEMMA Qt
- 7-pin SPI interface
- 4-pin UART interface
- 12-channel PWM pins for servos
- 4-channel ADC pins
- 2-pin WS2812 RGB LED port
- 40-pin GPIO header for connection with the Raspberry Pi SBC
- Misc
- Power switch
- User button
- Power, battery level, charging, and user LEDs
- Power Supply
- 6V- 8.4V 3-pin battery port for the Raspberry Pi and Fusion HAT+
- 5V via USB-C charging port; full charge in about 2 hours
- Dimensions – Raspberry Pi HAT+ form factor
There’s no LLM accelerator on the board itself, so AI processing runs on the Raspberry Pi SBC. It is compatible with OpenAI ChatGPT-4o, Google Gemini, DeepSeek, Grok, Doubao, Qwen, and Ollama, and the wiki also has information to run text-to-speech (TTS) and speech-to-text (STT).
While the documentation for the Fusion HAT+ looks good for AI/LLM and hardware details, it’s limited for software I/O control. However, there’s additional documentation for the AI Fusion Lab Kit offered with the Fusion HAT+ and various modules. Sadly, the AI Lab Kit is not available yet, and it might take a little longer until it is released.
SunFounder is currently sold for $34.99 on AliExpress, Amazon, and the company’s online store, including a battery pack.
Jean-Luc started CNX Software in 2010 as a part-time endeavor, before quitting his job as a software engineering manager, and starting to write daily news, and reviews full time later in 2011.
Support CNX Software! Donate via cryptocurrencies, become a Patron on Patreon, or purchase goods on Amazon or Aliexpress. We also use affiliate links in articles to earn commissions if you make a purchase after clicking on those links.
