A simple application to control DTR/RTS lines from linux shell
gcc dtr_rts_line_control.c -o dtr_rts_line_control
Set DTR line of /dev/ttyUSB0
dtr_rts_line_control /dev/ttyUSB0 DTR SET
Clear RTS line of /dev/ttyUSB0
dtr_rts_line_control /dev/ttyUSB0 RTS CLEAR