pirlock.ino

#include <Servo.h>

int pirPin = 2; //digital 2
int servoPin = 12; //digital 12
int lock = 0;
int unlock = 180;

Servo myservo;

void setup(){
  Serial.begin(9600); 
  
  pinMode(pirPin, INPUT);
  digitalWrite(pirPin, HIGH); //internal pull-up to activate PIR
  
  myservo.attach(servoPin);
  myservo.write(lock);
}


void loop(){
  int pirVal = digitalRead(pirPin);
  
  if(pirVal == LOW){ //was motion detected
    Serial.println("Motion Detected"); 
    if (myservo.read() >= 90) {
      Serial.println("locking");
      myservo.write(lock);
    }
    else {
      Serial.println("unlocking");
      myservo.write(unlock);
    }
    delay(3000); //pause to let the servo move
  }
}