ARDUINO DEVICE FOR Purpose of signals

Dear sir,

i am looking arduino device that can send different messages that can triggered by different contacts in arduino.

that mean no of inputs in arduino device every input contact when trigger send message store in the memory of arduino with respect to that perticular input .

and how many contacts we can get in this device.

please send me some detail i am searching this device in this site since long.

lalit kumar TATA POWER 9958294879

Those are very vague requirements, can you be more specific. 1) What is the trigger, is it a logic level? 2) This message in arduino memory, how long is it and what happens to it after it is stored? 3) An arduino Uno has 20 pins that can be used as inputs but take away 2 if you want to talk to a computer over serial.