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Serial port communication
I would like to send some text or command to the serial port (to the some HW) and read answer back. It works in terminal. I did probe it in minicom app. But when I would like to probe it in command line, it doesn't work.
echo "...." > /dev/ttyS0
It works ...
It doesn't work ..
Can you help me, please? Thnx for all info.