Itead Sim900 Wiring/Programming

For my engineering class, we are doing a project that involves sending a text from the arduino uno. We have an itead sim900 gsm/gprs minimum system module.

We found a code for the text shield, yet it still will not send a text. I'm not sure if we have it wired correctly.
I can't find a wiring guide for the sensor to the arduino uno.

If anyone could lead me in the right direction when it comes to wiring, it would be greatly appreciated. Also any programming tips would be great too!

Thanks! :slight_smile:

What sensor ?

Itead sim900

Links to hardware being used?

Sketch being used? (in code tags)

This one ?