Gsm 900 + arduino uno (newbie)

Hello. I need help in solving my final year project. Im doing fire detector system. All the component is ok. Except this gsm 900 shield… i actually dont know how yo use it… its kind of expensive huh…

1.when programming, does it need to put what pin? If yes, what is this shield gsm pin?

2.how to know my gsm is ready to go?? By led??

  1. I have followed a lot of tutorial on internet, use gsm example… but none of it was working

Did i do something wrong?? What is the 1st setup when you got gsm?

*i think the gsm in good condition because
1)i just bought it
2) i handle it with ESD device

Can somebody guide me?
Tq for you feedback :slight_smile:

Attachment = a snap of my gsm shield sim900

i actually dont know how yo use it.

So, why did you choose it?

1.when programming, does it need to put what pin?

No, the Arduino will try all pins until it guesses which pins you have chosen to use for what.

Of course you need to tell the Arduino which pins are for what.

If yes, what is this shield gsm pin?

18898 and -348743.

A GSM900 is a chip. Who knows which shield it is attached to? You do, and ONLY you do. Which knows which pins you are talking about? You do, and ONLY you do.

2.how to know my gsm is ready to go?? By led??

There is a difference between how you will know and how the Arduino will know. Which matters?

  1. I have followed a lot of tutorial on internet, use gsm example.. but none of it was working

Did i do something wrong??

No. All the tutorials on the internet are wrong.

Of course you did something wrong!

Attachment = a snap of my gsm shield sim900

We don't what pictures. We want links.