I am tired of working with Serial comport to send and receive data ( Windows ). I have tried every possible way. Every time i got able to connect and send data. But when it comes to receiving lines. 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.

I have a piece of simple code that works on a Windows - WAMP environment, e.g. It connects via a USB cable (using USB-Serial drivers) to a circuit-board to light some LEDs, and it works fine - so similarly windows software like 232Analyser, can connect to COM3 and send code in DEC like 1,255,255,255,255,5, and light the LEDs. The number 255, is a DEC number from: 1,2,4,8,16,32,64,128,255 which will light a certain LED depending on which number is called. Anyway, the code above works fine on Windows, and lights LEDs by calling this PHP file. So can call a URL like: which works ok. Canon Ir2870 Printer Driver.

Now I need it to work via Linux, on a Raspberry Pi, so I have just installed standard Raspberry Linux, and Apache with PHP. Antigone Jean Anouilh Translated Barbara Bray Pdf Printer. Then attached the USB cable, and it appears as /dev/ttyUSB0 I have then CHMOD 777 /dev/ttyUSB0 And changed the PHP code to: However calling this file on Linux in a browser is not Lighting the LEDs, as it does on Windows. Now when I call this file it goes through with no errors, without chmod 777, it gave a permission denied error. So it seems like it goes through ok, but something else is wrong.

So question is anyone know how to make it work on Linux, it might be I am calling the USB wrong, or Raspberry Linux needs some kind of drivers, or ' `mode ' needs to be defined differently.or maybe the decimal/binary code sent is not right like 'chr(2)' etc. Needs to be different and wont be sent in same way on a LAMP setup. Any ideas on what I can try?