[SOLVED] SIM900 initiation sequence

[misnomerfrenzy]

Hello,

This is my first time of working on GSM.

I have got a kit of SIM900A interfaced with ARM7.

To begin with, I am facing following problems...

1. I cant insert the sim card in the slot.
When I try to lock, the sim card oozes out of the slot.

2. I can just see the power on LED on of the SIM900 module at power on. The other LEDs like netlight and status are off completely.

3. I dont have the datasheet of the SIM900A module. Even I tried a lot on google, I could not find it.
(So, I dont know the exact initiation sequence at power on for the SIM900A)

Kindly help me resolving my problems.

 

[madhusuthanan]

search it as at commands. it's used in that communication through uart communication.

 

[misnomerfrenzy]

I got the answer to all the questions.