Arduino Uno R3 to iPhone intercom system

Projects General Guidance
1

Hello All,

Firstly I am brand new to this so I apologise if this is wrong or not in the correct place!

I have just invested in my first Arduino - an Uno R3 board. My idea is to create a doorbell intercom system, so that when the doorbell is pressed it dials an iPhone so you can speak to whoever is at the door, whether you are in or out. I've seen similar ideas on the net but none of them use the same technology. As well as the Uno R3 I have invested in the SIM 900 GPRS/GSM shield so that I can connect to the phone. I have also bought a cheap microphone and some tiny speakers.

The problem is that I am completely lost! I don't know where to start connecting things and programming. I'm not even entirely sure this project is possible. I was thinking of using a battery as a power supply. I would be so grateful for anyone that could steer me in the right direction with this.

I'm going to go and read about the basics now...!

Thank you for reading! :wink:

2

I'm not an expert, but does that Sheild even support voice calls ?

Looking at the spec I can only see mention of AT command set and nothing about voice

Does you shield look like it has audio connectors on it.

3

Thank you for your reply.

I've ordered the shield but haven't got it yet, I assumed from the spec that voice calls are possible, it allows
Short Message Service
• Audio
• GPRS Service

Having spent a few hours yesterday looking into how I could do this I'm now thinking of having a system where when the doorbell is pressed it firstly sends a text message to a phone which should be simple enough, then from there I call the 'doorbell' from the phone where it would connect and act as the intercom system.

I don't think I made this very easy for myself!! :o