php.serial class whackyness

Using Arduino Programming Questions
9

I havent debugged your example in any way but get an error Fatal error: Maximum execution time of 30 seconds exceeded in /var/www/php_serial.class.php on line 516
Ill look into it later tonight. I supposed to be doing real work right now :wink:

I do see this in the serial class.

/**
	 * Reads the port until no new datas are availible, then return the content.
	 *
	 * @pararm int $count number of characters to be read (will stop before
	 * 	if less characters are in the buffer)
	 * @return string
	 */
	function readPort ($count = 0)
	{
		if ($this->_dState !== SERIAL_DEVICE_OPENED)
		{
			trigger_error("Device must be opened to read it", E_USER_WARNING);
			return false;
		}

		if ($this->_os === "linux" || $this->_os === "osx")
			{
			// Behavior in OSX isn't to wait for new data to recover, but just grabs what's there!
			// Doesn't always work perfectly for me in OSX
			$content = ""; $i = 0;

			if ($count !== 0)
			{
				do {
					if ($i > $count) $content .= fread($this->_dHandle, ($count - $i));
					else $content .= fread($this->_dHandle, 128);
				} while (($i += 128) === strlen($content));
			}
			else
			{
				do {
					$content .= fread($this->_dHandle, 128);
				} while (($i += 128) === strlen($content));
			}

			return $content;
		}
		elseif ($this->_os === "windows")
		{
			/* Do nothing : not implented yet */
		}

		trigger_error("Reading serial port is not implemented for Windows", E_USER_WARNING);
		return false;
	}

Test PHP code

<?php
/* Script for Checking all the levels*/

	// Load the serial port class
	require("php_serial.class.php");
	//Initialize the class
	$serial = new phpSerial();
	//Specify the serial port to use... in this case COM1
	$serial->deviceSet("/dev/ttyUSB0");
	//Set the serial port parameters. The documentation says 9600 8-N-1, so
	$serial->confBaudRate(9600); //Baud rate: 9600
	$serial->confParity("none");  //Parity (this is the "N" in "8-N-1")
	$serial->confCharacterLength(8); //Character length (this is the "8" in "8-N-1")
	$serial->confStopBits(1);  //Stop bits (this is the "1" in "8-N-1")
	

// Ask Arduino what the Air Temp is.

	$serial->deviceOpen();
	$serial->sendMessage(chr(10)); // start transmission
	$serial->sendMessage(chr(50));
	$serial->sendMessage(chr(13)); // end transmission
//	$read = $serial->readPort(); // waiting for reply
$tries = 0;
$max_tries = 100;

while (!$read = $serial->readPort() && $tries < $max_tries) {
  // waiting for reply - do something else?
  $tries++;
}

if ($read) {
    $current_air_temp = $read;
	$current_air_temp = (int)$current_air_temp;
	//We're done, so close the serial port again
	$serial->deviceClose();

	mysql_query("INSERT INTO logging (stuff,Sensor) VALUES ($current_air_temp,'Air Temp')");
}
else {
	$serial->deviceClose();
  die("Timeout limit reached - data unavailable.");
}
	
	?>