I have a system like this: RPi -> FTDI(USB UART IC) -> RS485 transceiver -> RS485 TO USB board -> PC
I'm having some trouble testing RS485 communication between the RPi and the PC. I'm using a simple python based tutorial: https://www.waveshare.com/wiki/Raspberry_Pi_Tutorial_Series:_Serial
I'm using putty on PC to read 'hello world'. However when I run the python code on RPi, I don't see anything on putty. I have verified the tty port, COM port, baud rate, and wire connections.
What am I missing? Please help, thanks.