Hi.. I have successfully been able to have PHP (v 5.2.
send serial signals to an Arduino... I can repeatedly submit a PHP page and the commands work flawlessly.
If I reboot my Windows 2003 machine and then try and post the page, PHP does not display an error but the Arduino doesn't respond. I can open the terminal window and type in responses, so I know the Arduino has the program. If I then re-download the same software program, then I can send commands again from PHP.
Any help debugging why the serial connection is lost after boot-up?