Comments on: Sending an SMS Message with a GSM Modem using PHP

By: admin

admin — Mon, 16 May 2011 12:28:32 +0000

If you use e.g. HyperTerminal does everything work correctly (i.e. able to open the port)? Could be worth testing another COM port (e.g. COM1) if you have any available and see what results you get. That would help narrow down the issue to a specific COM port, or the script. Also as mentioned in the update on the post Serproxy, or PHP serial extension could be a more widely compatible option worth looking into.

By: Architectz

Architectz — Sat, 14 May 2011 03:27:05 +0000

Hello, My gsm modem is connected on COM10 and when I run your script I get.
Warning: fopen(COM10:) [function.fopen]: failed to open stream: Invalid argument

Please help me

By: Ganesh

Ganesh — Tue, 14 Dec 2010 12:02:23 +0000

Thanks for the code,
Works perfectly on windows (used wamp).

By: Aaron

Aaron — Sun, 29 Aug 2010 20:20:53 +0000

Great script, works on Windows.

I have tested it with a Wavecom M1306B.

Thanks for sharing the script, I managed to find a lot for Linux PHP modems on the Internet, but this is the only one so far for Windows PHP that works.

By: admin

admin — Sat, 13 Dec 2008 22:10:58 +0000

Could perhaps try the below, apart from that I am not sure – however please post if you find a solution.

while (!feof($this->fp)) {
$this->buffer .= fread($this->fp, 1024);
}

By: Young Kim

Young Kim — Fri, 12 Dec 2008 20:14:26 +0000

Hi,

I’ve been working on this and so far I’ve figured out to work to the point where it will open the port.
However, once it gets to wait_reply() function, it gets stuck. Meaning that it web browser just keeps on loading without ping out. The problem occurs in $this->buffer .= fread($this->fp, 1024); here… It seems like PHP can not read the port.

Do you have any idea that may be helpful to this?

— Young

By: Young Kim

Young Kim — Mon, 08 Dec 2008 21:25:11 +0000

I see that I am “nobody” trying to access from PHP side and /dev/ttyS0 is owned by “root” with group named “uucp”

I strongly think that this is the only issue that can cause all this mass… That’s what I’ve found so far…

By: Young Kim

Young Kim — Mon, 08 Dec 2008 21:08:34 +0000

Yes…
Everything works as expected in linux terminal.
When it becomes PHP that try to run the command line, it gives me the problem.

I did some research regarding this and there is a thing called suPHP. I am seeking to install this into my linux machine. What are you thoughts on this?

— Young

By: admin

admin — Mon, 08 Dec 2008 20:45:18 +0000

I would suggest first trying to confirm where the issue is, did you try running it as root on the command line, did it work?

By: Young Kim

Young Kim — Mon, 08 Dec 2008 19:29:00 +0000

I just tried

exec(“sudo stty -F /dev/ttyS0 9600″, $output, $retval);

Same error..

Am I missing something or doing something wrong here??

I really appreciate for your time

– Young