Is possible to program a software where we send people a text messege corresponding to a particular #, and when they reply to the text the software automatially (using wireless/bluetooth or even a radio signal o some kind causes) a circuit or device to buzz/beap/or light up a small LED light? we are a valet company, and we are investigating whether its possible to set up a system wherebye we send people a txt messege corresponding to a particular #, and when the people are ready to get their cars they reply to the text messege, a little bluetooth /wireless device we place on the hood of their car will blink so we know what car is theirs.

Software/Hardware used: