We have a Netduino 2 flashed to 4.2.2.
We can successfully talk over com ports 1 and 3 (PINs 0/1 and 7/8). The talking consists of sending a continues stream of short sentence like "this is test1this is test2this is testX.....".
Over ports 2 and 4, the receiver just dies after a few iterations.
We have tried various baud rates, but in our mind - it should just work. 19200, Parity.None, 8, 1 are the typical settings.
Any advice or help?