Uhhhh...this problem come from ubuntu permissions. Need to change serial port permissions i.e.
sudo chmod a+rw /dev/ttyUSB0
to enable serial port read and write.
Need to change serial port permissions
or add your user to dialout group
yes, working both solution
@fanoush started
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Uhhhh...this problem come from ubuntu permissions.
Need to change serial port permissions i.e.
to enable serial port read and write.