int ledPin = 14; // choose the pin for the LED
int inputPin = 12; // choose the input pin (for PIR sensor)
int pirState = true; // we start, assuming no motion detected
int val = 0; // variable for reading the pin status
int minimummSecsLowForInactive = 5000; // If the sensor reports low for
// more than this time, then assume no activity
long unsigned int timeLow;
boolean takeLowTime;
int warm_up;
int Detection;
int DetectionFromField;
int sensor_output;
int statusCode;
int count = 0;
 
//the time we give the sensor to calibrate (10-60 secs according to the datasheet)
int calibrationTime = 10;
 
void setup() {
  Serial.begin(115200);
  pinMode(ledPin, OUTPUT); // declare LED as output
  pinMode(inputPin, INPUT); // declare sensor as input
      
  //give the sensor some time to calibrate
  Serial.print("calibrating sensor ");
  for(int i = 0; i < calibrationTime; i++){
    Serial.print(".");
    delay(1000);
  }
  Serial.println(" done");
  Serial.println("SENSOR ACTIVE");
  delay(50);
}
 
void loop(){
  val = digitalRead(inputPin); // read input value
  if (val == HIGH) { // check if the input is HIGH
    //digitalWrite(ledPin, HIGH); // turn LED ON
    if (pirState) {
     // we have just turned on
     pirState = false;
     Serial.println("Motion detected!");
     // We only want to print on the output change, not state
     digitalWrite(ledPin, HIGH);
     
    delay(50);
   }
  takeLowTime = true;
  } else {
    //digitalWrite(ledPin, LOW); // turn LED OFF
 
    if (takeLowTime){
     timeLow = millis();
     takeLowTime = false;
    }
 
    if(!pirState && millis() - timeLow > minimummSecsLowForInactive){
     pirState = true;
     Serial.println("Motion ended!");
     digitalWrite(ledPin, LOW);
     delay(50);
     
    }
  }

}