Portenta C33 listed as supported for RS232 comms but not working

Official Hardware Portenta Family Portenta Max Carrier
1

I am trying to use the Portenta C33 on the Max Carrier to provide an RS232 to CAN bus bridge after having failed to do so with the H7 (I didn't notice it was "not supported" for use with CAN on the Max Carrier).

The issue is that the ArduinoRS485 library cannot be used with the C33:

WARNING: library ArduinoRS485 claims to run on samd, mbed_portenta, mbed_opta, mbed_nano, renesas_uno architecture(s) and may be incompatible with your current board which runs on renesas_portenta architecture(s).

I believe I have fallen in the trap of having a board that is supported in that it might be possible to do but there isn't a library for it.

Does anyone know how to use RS232 on a C33 / Max Carrier combo?

2

I've used it directly from the C33 boards, at JDIG, pins 8 (RX) and 9(TX). Could that work for your project?

3

Thanks for the suggestion. Good to know that works.

Since then I had moved to a Portenta X8 with the Max Carrier board which was a really great setup but unfortunately RS232 would not work with our device (it did work with others though). So I finally ended up going for a Portenta Machine Control which worked well.