For years now, I’ve been looking for answers to why my FDTI USB serial sensor doesn’t work.
I have a Rasp Pi 4 running home assistant OS connected to an old Arcam rs232 AV Amp.
I can send shell commands using “echo -e “\x50\x43\x5f\x2f\x31\x31\x0d” > /dev/ttyUSB0” but can never receive a response no matter what I try.
Anyone help?