WiFi для Arduino.

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Начальная страница - relay_button.php -

<?php 
include "php_serial.class.php"; 
$serial = new phpSerial; 
$serial->deviceSet("/dev/ttyACM0"); 
$serial->confBaudRate(9600); 
$serial->deviceOpen(); 
usleep(2000000); 
$read = $serial->readPort(); 
print $read; 
$serial->deviceClose(); 
?>