Adafruit MCP2221A USB to GPIO/I2C Breakout

Overview

The Adafruit 4471 is a versatile USB to GPIO and I2C bridge breakout board based on the Microchip MCP2221A chipset. It allows a computer or single-board computer to communicate directly with I2C sensors, UART devices, and GPIO through a standard USB connection. The board includes a Stemma QT/Qwiic connector for solderless plug-and-play prototyping with a wide ecosystem of sensors.

Why Choose This Part

This breakout features the Stemma QT system for instant connectivity to I2C devices without soldering. It supports multiple logic levels and provides four GPIO pins that can also function as ADC inputs or DAC outputs, offering more flexibility than standard USB-to-UART bridges.

Applications

Getting Started

Connect the board to a PC via a USB Type-C cable to begin using it with the Adafruit_Blinka library in Python. This allows you to run CircuitPython code directly on your Windows, Mac, or Linux machine to control the hardware pins.