Arduino Burglar Alarm Sends SMS

Re:Arduino Burglar Alarm Sends SMS by aimatt on Thursday May 03, 2012 @11:37AM (#3924281)

But a lot more expensive

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Re:Arduino Burglar Alarm Sends SMS by excuse-me on Thursday May 03, 2012 @11:46AM (#3924319)

Does anyone know of a cheap and simple SMS only GSM modem?

All the ones I have used were expensive industrial spec units with complex data channels.

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Re:Arduino Burglar Alarm Sends SMS by gouranga on Thursday May 03, 2012 @11:51AM (#3924345)

Huawei GTM900

Has serial port which takes AT commands. Easy enough to drive it.

Costs $20 a shot.

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Re:Arduino Burglar Alarm Sends SMS by asmithmd1 on Thursday May 03, 2012 @04:17PM (#3925577)

Have you tried one of these out? Where can you buy one?

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Re:Arduino Burglar Alarm Sends SMS by gouranga on Thursday May 03, 2012 @04:36PM (#3925672)

http://www.rfsolutions.co.uk/acatalog/RFS_GSM_Modules.html

I have tried out. Well documented and you can get the breakout boards for $5 but I forget precisely where. Managed to get it working in UK on O2 pay as you go. Now in junk box :(

Watch out - you need a level shifter if you're using an Arduino or something as it has 3v3 operation. I used an old(er than me) HP lab PSU and a crudely hacked up set of BC548 switches as a level shifter. You need an antenna and a sim socket (my sim was cruely soldered onto 1/0.2 solid wire and plugged into the breakout board header).

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Re:Arduino Burglar Alarm Sends SMS by joshu on Thursday May 03, 2012 @04:12PM (#3925540)

oh god, thank you so so so so much for this.

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Re:Arduino Burglar Alarm Sends SMS by aimatt on Thursday May 03, 2012 @11:48AM (#3924333)

You can hack this module: http://finch.am/projects/arduinogsm/ $25

OR you can buy this arduino shield: http://www.sparkfun.com/products/9607 $100

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Re:Arduino Burglar Alarm Sends SMS by revelation on Thursday May 03, 2012 @11:54AM (#3924357)

If it doesn't have to be SMS only, there are various mass market "surf sticks" offered by providers on the cheap, marketed at laptop owners and the like. Many of them are just AT modems with serial ports tunneled through USB and then controlled by an application on the computer.

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Re:Arduino Burglar Alarm Sends SMS by excuse-me on Thursday May 03, 2012 @12:07PM (#3924413)

Thanks, I assumed those would need a whole series of windows drivers to initialise them. But it looks like you can just jumper straight to the RS232 interface on this chip

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