For this new version the following modes have been added: SPI (Master & Slave), I2C (Slave only) & UART.
Also lot of fixes and cleanup.

HydraFW Link: https://github.com/bvernoux/hydrafw
Wiki HydraFW commands: https://github.com/bvernoux/hydrafw/wiki/HydraFW-commands
Release with pre-built firmware: https://github.com/bvernoux/hydrafw/releases/tag/v0.3-beta

Some tests done with SPI, UART and I2C with Logic Analyzer ScanaPLUS: