Kill process that raises Device or resource busy: '/dev/ttyUSB0'?

Question

I connect to my Arduino board with the following Python code.

device=glob.glob(\"/dev/ttyUSB*\")[0]
time.sleep(1)
arduino = serial.Serial(device, 115200, timeout         


        

Answer 1

Run:

$ ps ax

You will see what process is using serial port. Kill that process. This solved it for me.