Hello what GPIO pins are free to use with other devices connected ?
I have a software made with Codesys (not supported by Unipi) but I need to manage 1 relays more (because Unipi has only 8 realays) so I don't know what hardware I can use and wich protocols in codesys (modbus, OPCuA, I2C) use without damage the commands to Unipi board.
Can I use I2C with other drivers for example in NODE-RED ?
I don't know if is possible to use 2 software driver for I2C devices (with different addresses) or It need a mutex...
Thanks!