E.g. instead of: (ttyACM1): --> 'AT*EIAAUW=2,1,"(null)","vodafone"<CR>' (ttyACM1): <-- '<CR><LF>OK<CR><LF>' Better pass: (ttyACM1): --> 'AT*EIAAUW=2,1,"","vodafone"<CR>' (ttyACM1): <-- '<CR><LF>OK<CR><LF>'
E.g. instead of: (ttyACM1): --> 'AT*EIAAUW=2,1,"(null)","vodafone"<CR>' (ttyACM1): <-- '<CR><LF>OK<CR><LF>' Better pass: (ttyACM1): --> 'AT*EIAAUW=2,1,"","vodafone"<CR>' (ttyACM1): <-- '<CR><LF>OK<CR><LF>'