Hi all, I need to run python script that read/write to serial port (/dev/ttyS0). As root, i can run the script without problem but when i tried to involke it via browser ( apache2. PHP 4.3) i got error. The error is /dev/ttyS0 - Permission denied. i tried chmod go+wr /dev/ttyS0...but it not working. Please help me. BTW - im using Core 3 on i386, pySerial python module and apache2. Thanks in advance. -- regards, kamarudin samsudin