Adafruit I2CDriver by Excamera Labs

I²CDriver is a versatile and open-source tool designed for smooth interaction with I²C devices, supporting quick driver development and precise debugging. Compatible with Windows, Mac, and Linux, it features a built-in color screen displaying real-time I²C activity.

Utilizing a standard FTDI USB serial chip, no additional drivers are necessary. It’s like a Bus Pirate with a display and extensive Python support, suitable for integration within phones, embedded electronics, microcontrollers, Raspberry Pi, and PC motherboards.

This mature technology, with 36 years of reliability, is essential for novices and embedded designers alike, addressing common I²C challenges with a clear logic-analyzer display and graphical traffic decoding.

An intuitive address map highlights connected devices instantaneously while current and voltage monitoring anticipate electrical issues. With color-coded wires and no need for pinout diagrams, setup is effortless. The package includes a 3.3 V supply, a high-side current meter, programmable pull-up resistors, and three I²C ports for multiple device connections.

I²CDriver delivers free, open-source software, providing a range of control options via GUI, command-line, C and C++ in a single source file, and Python 2 and 3 modules. An assembled, tested board with jumper cables is included for immediate use.