AVR ATMEGA32 – How to use for automated recorded voice call

[Aparj]

My project requirement is to send SMS and audio recorded calls(like automated recorded alerts) on mobiles to users using AVR ATMEGA32.

As of today I can send SMS and make audio call. My query is for audio recorded call mechanism when user pick up the call initiated from GSM module.

I can find and track the response signals from microcontroler when call get dialed and when call hang up by user without response but

I am unable to track response signal from microcontroller  when user receives call. I have also referred GSM module reference PDF  but nothing has been specifically mentioned over there.

As I am not getting response signal I am unable to do my rest of functionally for generating audio recorded call (like any answering machine)when user receives call.

Appreciates if anyone give me some pointers on this.

Thanks.

[AJISH ALFRED]

Hi Aparj,

I hope you will find this link helpful

http://www.activexperts.com/serial-port-component/tutorials/gsmdial/

[Ganesh Selvaraj]

We get the following response from the GSM modem when it initiates the call

If no dial tone we get

“NO DIALTONE” 

 

If busy  

“BUSY” 

 

If a connection cannot be established

“NO CARRIER” 

 

 

If connection successful and voice call 

“OK”

 

so when the user receives the call (i.e. he accepts the call), we get “OK” from the modem. write tho code in such a way that once the micrcontroller receives “OK” from the modem, the audio starts.

 

 

[Author]

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