SMBusb - Open-source USB SMBus interface

SMBusb is a cheap, versatile, open-source SMBus (and I2C) USB interface.

Features

• Based on the Cypress FX2LP dev-board shown above (available for ~$5 shipped on eBay)
• Read/Write all standard SMBus transfer modes (byte, word, block)
• Packet Error Checking (PEC) support
• Arbitrary protocol functionality (allows for I2C or non-standard SMBus protocols)
• Device and command discovery/probing
• No extra components needed
• Open source firmware and library
• Multi-platform. (Tested on Linux and Windows)
• Firmware is compiled into the library and loaded on-demand

Driver

• No driver needed on Linux or other *NIX.
• Zadig Driver Installer can be used on Windows (WinUSB driver)

Software

• Source code and binaries: https://github.com/karosium/smbusb/releases/
• Library documentation: https://github.com/karosium/smbusb/tree/master/lib
• Build instructions: https://github.com/karosium/smbusb

Hardware

• Use the SCL/SDA/GND pins marked on the dev-board, NO external pull-up resistors necessary.

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