Hello everyone! Happy to be here - spent some time reading a bit on the forum earlier today, glad to see there are some people out there that use this platform.
Hopefully, this hasn’t been asked before - if it has, I apologize in advance. In short, I am moving a project that’s been running on a Raspberry Pi 3, and then a Raspberry Pi Zero, over to the Banana Pi-M2 Zero platform and ran into a communication issue right out of the gate.The current hardware I have connects to UART 0 on pins 8 and 10 of the Raspberry Pi, which work with a standard MAX232 type of chip to communicate with a standard RS232 serial port. My hope was that I would be able to do the same thing with the Banana Pi, but I have not as of yet been able to get this to work. I did make sure that “Login shell accessible over serial” is turned on, but obviously no help.
By the way, the image I am using is named 2020-04-10-raspbian-jessie-ap6212-bpi-m2z-sd-emmc. I thought this was the most recent one, but it looks like there’s another one available. I’m also assuming that the default parameters of 115,200/8/N/1 are correct.
I’ve also tried moving my MAX232 over to UART 1 (pins 11 and 13, I believe) just to test; I believed I read something by frank-w that talked about some confusion between the two UARTs so I thought it was worth a try. This did not work either. I have not tried any further debugging (i.e., checking pin voltages for 3.3V, oscilloscope, etc.) as I think this is probably something simple.
Looking forward to any help anyone might be able to provide - any questions, feel free to ask.
Thanks in advance, Marshall