MICO makes Arduino cell phone interface easy, so that users can focus
on creating their awesome projects and not on debugging. MICO is the
development platform for creating remotely controlled projects such as
Home automation taking advantage of the cellular network. MICO plugs
into an Arduino board and connects to a cell phone's headset jack.
It then uses pre-recorded voice prompts to present information and
options to callers, and touch-tone telephone keypad entry to gather
responses. Responses can then be used to control lights, motors and
other actuators, and get readings of temperature, wind speed,
proximity and other sensors. The caller can be just a few feet or
hundreds of miles away!
MICO is an acronym for Mobile Interactive voice response ">Key
* Detect a ringing phone - monitoring signal amplitude on analog
* Answer the phone - toggling the Answer/End call button
* Play audio - stored in the MicroSD card
* Decode DTMF tones - dedicated onboard IC
* Encode DTMF tones - playing recorded tone files
Download the MICO software
The MICO software  is free, open source. These libraries and sample
sketches are compatible with the Arduino Software and will help you
get you going in no time!
Visit the getting started  section for specific instructions and
tutorials on using your board.