GSM modules

Thric

Has anyone tried connecting a GSM module to the propeller?

I'm planning on trying a project that uses a GSM module and I'm just wondering if anyone has done it before and on what module and what program they used. Is it a hard thing to interface?

pgbpsu

Have a look in the wireless forum. There is a thread there that has some info that might be useful.

Leon

I've used a u-blox module with a small PIC, so it should be easy to get one working with the Propeller. u-blox are expensive but they work very well, especially in difficult situations which is why they are popular with the military and law-enforcement agencies.

All you need is a serial program to get started, then parse the incoming sentences for the data you need. I just looked for a $GPRMC in the data, skipped the following comma, and put the next 70 (IIRC) bytes in a buffer. I then extracted the location data I needed from the buffer. The same simple technique should work with other modules.

Thric

@Leon
I think you missinterperted gps with gsm. I was looking more into this:ADH8066 GSM Module
(http://www.sparkfun.com/products/10138).

I'm not sure how to send AT commands to the device and I was wondering how to do it or whether anyone has a program that already does.

Edit: The goal of the project is to send a text message to my phone on where it is.

Leon

Sorry about that.

It's similar, though. You need the same serial routines to communicate with a GSM module. Transmit AT<CR> and you should get OK back. Then take it from there.

pgbpsu

Thric-

It looks like Jay has solved this for GSM type phones (SIM card). This is from a link in the wireless forum:

http://forums.parallax.com/showthread.php?t=107112

Now if only there were a Verizon solution....

Thric

Great link, thats exactly what i'm looking for.

Thanks