Warning: Specified serial port is not valid in D:\php\php_serial\php_serial.class.php on line 111

Warning: The device must be set before to be open in D:\php\php_serial\php_serial.class.php on line 137

Warning: Device must be opened in D:\php\php_serial\php_serial.class.php on line 541

Warning: Device must be opened to read it in D:\php\php_serial\php_serial.class.php on line 474

Warning: Unable to set the baud rate : the device is either not set or opened in D:\php\php_serial\php_serial.class.php on line 204