Block Diagram The security system comprises of an Arduino ... D7 (Active LOW) //CALL Trigger Key connected to D8 (Active LOW) //END Key Connected to D9 (Active LOW) #include NewSoftSerial mySerial(3,4 ...

So, let’s start by watching this 7 minutes video to see the entire system in action: The resetAlarm integer is the Arduino pin where we connect the button that is used the reset the alarm. The relay ...