... = 0; // Connect to the Arduino $fp = fsockopen( "tcp://". $arduino_ host, $arduino_ port, $errno, $errstr, 30 ); stream_set_timeout( $fp, 3000 ); // Watch for changes while (!feof($fp)) ... workaround for a design problem in the core Arduino system. In most projects it’s enough to use the millis() function to return the number of milliseconds since the Arduino started up, but unfortunately ... very poor support for serial communications, so rather than trying to open the serial port directly, we’ll cheat by using a program that runs as a daemon and opens the port for us then makes...