I have a serial interface connected via USB. I have a simple white true loop checking every 15 minutes if /dev/ttyUSB0 exists (purpose is to execute some code if its not there):
if [ -e /dev/ttyUSB0 ]; then
It works well; however, it appears that if the device ever disconnects even for a few seconds (like a reboot), when the next check happens, it thinks its not there (even though the interface is connected and working, data is flowing and /dev/ttyUSB0 is there).
Why is this?
