Insert data from com port

[fran]

My code is telling me that the port is open but isn't reading $buffer.  No errors are reporting.

 

 
error_reporting(E_ALL);
 
$fp = fopen('COM1', 'r+');
if(!fp){
 echo "Port not accessible";
} else {
echo "Port COM1  opened.";
}
$output = "mode COM1: BAUD=1200 PARITY=Even data=7 stop=1 Xon=off";
$buffer = fgets($fp);
echo "Read: $buffer";
 

 

Any suggestions?