php - Serial port access denied -

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i running apache web server on raspberry pi. have python code executes in index.php file follows:

<?php system("python /home/pi/python/foobar.py") ?>

the python script opens serial port, so:

ser = serial.serial() ser.port = "/dev/ttyusb0"

when run python script command line on raspberry pi, works perfectly. however, when browse site on computer, error message:

[errno 13] permission denied: '/dev/ttyusb0'

i have done research , found people run error because user doesn't belong dialout group. when using raspberry pi, belong it, , assume on computer, don't.

in summary, how permission access serial port on raspberry pi server?


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