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SMS to light an LED!

Posted by markvenn Apr 7, 2015
Hi I have been playing with my Uno and GSM shield to try to see if I can get the real world to react to a good old fashioned SMS text. In these days of 3G and 4G data rates, I wanted to show that we don't have to have the latest toys to interact with the real world. So, to start I am using a common cathode RGB LED with a first gen Uno with an R3 GSM shield wired up as below. (Please imagine an Uno underneath this shield :-)) So, the idea is to react to the contents of an incoming text mess ...