PIR Sensor Based Security Alarm Using Arduino

 

Circuit Diagram :-

Code :- 

//Prateek //wwww.prateeks.in //https://www.youtube.com/c/JustDoElectronics/videos #include <SoftwareSerial.h> const String PHONE = "+918830584864xx"; #define rxPin 2 #define txPin 3 SoftwareSerial sim800(rxPin,txPin); int pir_sensor = 6; void setup() { pinMode(pir_sensor, INPUT); Serial.begin(115200); sim800.begin(9600); Serial.println("SIM800L software serial initialize"); sim800.println("AT"); delay(1000); } void loop(){ while(sim800.available()){ Serial.println(sim800.readString()); } while(Serial.available()) { sim800.println(Serial.readString()); } int val = digitalRead(pir_sensor); if (val == HIGH) { //state = HIGH; Serial.println("Motion detected!"); Serial.println("calling...."); delay(1000); sim800.println("ATD"+PHONE+";"); delay(20000); } }


GitHub Link :-       Code


Video :-