Help with SMS controlling the relay shield

I purchased this exact same setup: http://www.open-electronics.org/wp-content/gallery/gsm-shield/gsm-shield-3.jpg

I have it working, everything seems fine, but I want to be able to switch relays on and off with an SMS. I have tried several different things that I've found, but nothing is working for me. I'd love to be able to get it to take an input and send a text (which I can do with the reset button), but mainly I'd like to activate outputs with an SMS. I have looked for weeks on end, and I can't seem to find something cut and dry.

Please help.

It is an Adruino UNO with a SIM900 GSM Shield. Any help would be much appreciated!

I'm sure lots of people use the simcom 900 to do automation via text/sms... Any help?

What are the problems you are facing? building the circuit? programming it?

I have made a similar project that activates a relay by SMS but using an Android phone instead, it is one of my projects listed here http://www.buildinginternetofthings.com/list-of-projects/

Wow. This is absolutely amazing... Some of the best stuff I have seen for the Arduino! I might email you if that is ok!

Sure :wink: