Please help me write a PHP program to send information to the COM port. The simpler the code, the better.
Thank you in advance, and also wish you a nostalgic atmosphere and a warm summer,
Ilya
Here's an example of how to do this with fopen:
php.net/manual/en/function.fopen.php#112243
Here's a library for this:
https://github.com/Xowap/PHP-Serial