Here's an I2C to RS-232 serial converter for long term monitoring of an I2C bus. I needed this at one point, and made it with the cheapest FPGA board available

Here's an I2C to RS-232 serial converter for long term monitoring of an I2C bus. I needed this at one point, and made it with the cheapest FPGA board available on eBay: https://github.com/jhallen/i2cmon https://github.com/jhallen/i2cmon