Basic usage of Gorilla.

gorilla-basic-usage.php

<?php

// $device = 'COM4'; // on Windows
$device = '/dev/ttyUSB0'; // on Linux 

/*
 * create new instance
 */
$port = new SerialPort();

try {
    /* 
     * open the port
     */
    $port->open($device);
    
    /*
     * configure baud rate
     *
     * you can specify baud rate as integer, 
     * or other class constants like SerialPort::BAUD_RATE_*
     */
    $port->setBaudRate(SerialPort::BAUD_RATE_9600);
    
    /*
     * configure flow control
     * 
     * any other options are below.
     * SerialPort::FLOW_CONTROL_SOFT is software flow control.
     * SerialPort::FLOW_CONTROL_HARD is hardware flow control.
     */
    $port->setFlowControl(SerialPort::FLOW_CONTROL_NONE);
    
    /*
     * configure canonical mode
     * 
     * canonical mode is for text-based communication.
     * non-canonical mode is binary-safe.
     * more detail information about VMIN and VTIME, 
     * see http://www.unixwiz.net/techtips/termios-vmin-vtime.html
     */
    $port->setCanonical(false)
            ->setVTime(1)->setVMin(0);
    
    /*
     * read data from port.
     * you can get size of actual read data with strlen($data) .
     */
    $data = $port->read(256);
    
    /*
     * send data.
     */
    $port->write($data);
    
} catch (Exception $e) {
    print $e->getMessage() . PHP_EOL;
    $status = 2;
}

if ($port->isOpen()) $port->close();