I have a Serial Port (Via USB serial Emulator FTDI) working well in Windows environment and it compiles and runs ok. 9600 & 115200 Baud is working on different products but when i compile to the RPI 3B+ the 9600 seems to work but i cannot get any response from the 115200 product. I read that it may be something to do with the core freq and have tried adding the core_freq 250 line to the boot config.txt but it makes no difference.
Any ideas?
Jon