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

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

Warning: Unable to set parity : the device is either not set or opened in D:\php\send_test\php_serial.class.php on line 254

Warning: Unable to set length of a character : the device is either not set or opened in D:\php\send_test\php_serial.class.php on line 298

Warning: Unable to set the length of a stop bit : the device is either not set or opened in D:\php\send_test\php_serial.class.php on line 335

Warning: Unable to set flow control mode : the device is either not set or opened in D:\php\send_test\php_serial.class.php on line 376

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

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

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

Fatal error: Uncaught Error: Object of class phpSerial could not be converted to string in D:\php\send_test\send_test.php:27 Stack trace: #0 {main} thrown in D:\php\send_test\send_test.php on line 27