Raspberry Pi 4
Starting .py script as a service
No monitor
USB barcode scanner as keyboard for input (shows on hidraw0)
Trying to figure out how to get the script to capture input from the scanner in a non-blocking fashion.
Triedbut it seems to need an active window.
I just need to read the barcode, match it to a data file, and write out the result to a text file.
Everything works fine if I start the script from Geany with a monitor and have the resulting open window be the focus. But I get nothing if I start it as a service when the Pi boots up.
Tried to read from hidraw0, but that seems to be blocking.
Starting .py script as a service
No monitor
USB barcode scanner as keyboard for input (shows on hidraw0)
Trying to figure out how to get the script to capture input from the scanner in a non-blocking fashion.
Tried
Code:
while sys.stdin in select.select([sys.stdin], [], [], 0)[0]: bc = sys.stdin.readline()I just need to read the barcode, match it to a data file, and write out the result to a text file.
Everything works fine if I start the script from Geany with a monitor and have the resulting open window be the focus. But I get nothing if I start it as a service when the Pi boots up.
Tried to read from hidraw0, but that seems to be blocking.
Statistics: Posted by evanmars — Tue Sep 10, 2024 6:12 pm — Replies 0 — Views 28