need some help and support to understand how the GSM module works

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Eng.Mina

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hiiiii
plz need some help and support to understand how the GSM module works?

what is inside the GSM module " GM862"?

what's the steps to send or receive SMS or call ?

what 's the function of AT commands ?

thx plz help me .
 

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thx tpetar

but need block diagram of internal modue of GSM
and steps to send or receive SMS or call ? or the path of data flow to the BTS from sensor or external micro controller or BTS to GSM ... to external micro controller .

and how to use at commands to send sms or make a call ?
what's the parameter i need to initialize the code to prepare GSm to send a sms .?
thx for ur replay
 

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