Using PHP and Serial Lib to talk to a Teensy

view story

http://stackoverflow.com – I'm using PHP and the php_serial.class.php library to talk to a Teensy (an Arduino clone with a native USB port). I've got it working fine with one issue. I have to set the access permissions to the /dev/ttyACM0 device every time I plug it into the CentOS based server. (chmod o+rw ttyACM0) How do I make this change permanent? (HowTos)