basic code that generate a log for console on a terminal when happen or detected a motion

Motion sensor.ino

// this constant won't change:
const int  buttonPin = 2;    // the pin that the pushbutton is attached to
const int ledPin = 13;       // the pin that the LED is attached to

// Variables will change:
int buttonPushCounter = 0;   // counter for the number of button presses
int buttonState = 0;         // current state of the button
int lastButtonState = 0;     // previous state of the button

void setup() {
  // initialize the button pin as a input:
  pinMode(buttonPin, INPUT);
  // initialize the LED as an output:
  pinMode(ledPin, OUTPUT);
  // initialize serial communication:
  Serial.begin(9600);
Serial.println("Prueba Modulo PIR ARDUINO_UNO");
Serial.println(" "); 

}


void loop() {
  // read the pushbutton input pin:
  buttonState = digitalRead(buttonPin);

  // compare the buttonState to its previous state
  if (buttonState != lastButtonState) {
    // if the state has changed, increment the counter
    if (buttonState == HIGH) {
      // if the current state is HIGH then the button
      // wend from off to on:
      buttonPushCounter++;
      Serial.print("on - ");
      Serial.print("Sensor de Presencia:  ");
      Serial.print(buttonPushCounter);
      digitalWrite(ledPin, HIGH);
    } 
    else {
      // if the current state is LOW then the button
      // wend from on to off:
      Serial.println(" - off");
     Serial.println(" "); 
     digitalWrite(ledPin, LOW);
    }
    // Delay a little bit to avoid bouncing
    //delay(50);
  }
  // save the current state as the last state, 
  //for next time through the loop
  lastButtonState = buttonState;


  // turns on the LED every four button pushes by 
  // checking the modulo of the button push counter.
  // the modulo function gives you the remainder of 
  // the division of two numbers:
//  if (buttonPushCounter % 4 == 0) {
//    digitalWrite(ledPin, HIGH);
//  } 
//  else {
//    digitalWrite(ledPin, LOW);
//  }

}