#include <Arduino.h>
#include "DHTesp.h"
#define timeSeconds 3
 
// Set GPIOs for LED and PIR Motion Sensor
const int led = 33;
const int motionSensor = 32;
const int buzPin = 25;
const int pinDHT = 15;
int32_t contador = 0;
DHTesp dht;
 
// Timer: Auxiliary variables
unsigned long now = millis();
unsigned long lastTrigger = 0;
boolean startTimer = false;
boolean motion = false;

// Checks if motion was detected, sets LED HIGH and starts a timer
void IRAM_ATTR detectsMovement() {
  digitalWrite(led, HIGH);
  digitalWrite(buzPin, HIGH);
  startTimer = true;
  lastTrigger = millis();
}

void setup() {
  // Serial port for debugging purposes
  Serial.begin(115200);
  
  // DHT Setup
  dht.setup(pinDHT, DHTesp::DHT22);
  // PIR Motion Sensor mode INPUT_PULLUP
  pinMode(motionSensor, INPUT_PULLUP);
  // Set motionSensor pin as interrupt, assign interrupt function and set RISING mode
  attachInterrupt(digitalPinToInterrupt(motionSensor), detectsMovement, RISING);

  // Set LED to LOW
  pinMode(led, OUTPUT);
  digitalWrite(led, LOW);
  // Set Buzzer to LOW
  pinMode(buzPin, OUTPUT);
  digitalWrite(buzPin, LOW);
}

void loop() {
  // Current time
  now = millis();
  if((digitalRead(led) == HIGH) && (motion == false)) {
    contador++;
    Serial.print(String(contador) + " ¡¡¡MOVIMIENTO DETECTADO!!! ");
    motion = true;
  }
  // Turn off the LED after the number of seconds defined in the timeSeconds variable
  if(startTimer && (now - lastTrigger > (timeSeconds*1000))) {
    TempAndHumidity data = dht.getTempAndHumidity();
    Serial.println("-> Alarma LED y zumbador detenido en " + String(timeSeconds*1000) + "[ms] ");
    Serial.println(String(contador) + " Temperatura: " + String(data.temperature, 2) + "°C");
    Serial.println(String(contador) + " Humedad: " + String(data.humidity, 1) + "%");    digitalWrite(led, LOW);
    Serial.println("-----");
    digitalWrite(buzPin, LOW);
    startTimer = false;
    motion = false;
  }
  delay(10);
}