Communicating serial port on windows with php
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You need to determinate COM port number of your USB device via some external command called trough PHP's shell_exec().
For Windows you can try this small tool:
http://todbot.com/blog/2012/03/02/listcomports-windows-command-line-tool-for-usb-to-serial/
https://github.com/todbot/usbSearch/
After you call this tool via shell_exec(), you need to parse it's output (RegExp) and look for exact COM port number based on company/device name.
Comments
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Radhakrishna Rayidi over 1 year
I'm working with an application which connects to Huawei 3G Modem using COM ports in php. Here is my code:
<?php include("sms.php"); $sms = new sms(); $device = "COM11"; exec("mode $device BAUD=9600 PARITY=n DATA=8 STOP=1 xon=off octs=off rts=on"); $comport = fopen($device, "r+b"); if ($comport === false){ die("Failed opening com port<br/>"); }else{ echo "Com Port Open<br/>"; } //Set non-blocking mode for writing //stream_set_blocking($comport, 0); $sms->_blocking($comport,0); $atcmd = "AT\r"; fputs($comport, $atcmd); sleep(5); // Sleep for response from the modem // Set blocking mode for reading $sms->_blocking($comport,1); $res = fgets($comport, 4017); if(trim($res) == "OK"){ echo "Modem supports AT Commands<br/>"; }else{ echo "Error response: ".$res; } fclose($comport); ?>
sms.php:
<?php class sms{ function _blocking($device,$mode){ stream_set_blocking($device, $mode); return true; } } ?>
This is working fine with me. Now challenge is every time i connect to the new usb port the COM was changing for my modem. Is there any other way to detect the device automatically with php in windows ?