Smart Security System using GSM SIM900A with Arduino Uno || Make a call with GSM SIM900A

In this tutorial we will discuss how to interface the GSM SIM900A with Arduino Uno and create a Smart security system using IR sensor. When someone will pass in front of the IR sensor the GSM SIM900A will call the the number enter in the code.

Download the code and circuit diagram from the link below:
https://github.com/theinfoflux/Smart-...

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