/*
 * Created by ArduinoGetStarted.com
 *
 * This example code is in the public domain
 *
 * Tutorial page: https://arduinogetstarted.com/tutorials/arduino-lm35-temperature-sensor
 */

#define ADC_VREF_mV    5000.0 // in millivolt
#define ADC_RESOLUTION 1024.0
#define PIN_LM35       A0

#define ECHO_PIN 2
#define TRIG_PIN 3


int inputPin = 5;               // choose the input pin (for PIR sensor)
int pirState = LOW;             // we start, assuming no motion detected
int val = 0;   

int LedRed = 13;
int LedBlue = 12;
int LedGreen = 11;

void setup() {
  Serial.begin(9600);
//leds
  pinMode(LedRed, OUTPUT);
  pinMode(LedBlue, OUTPUT);
  pinMode(LedGreen, OUTPUT);

  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);

  pinMode(inputPin, INPUT);
}

float readDistanceCM() {
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);
  int duration = pulseIn(ECHO_PIN, HIGH);
  return duration * 0.034 / 2;
}

void loop() {
  //sensor ultrasonido
  float distance = readDistanceCM();
  bool isNearby = distance < 30; //centimetros
  
  val = digitalRead(inputPin); 

  // get the ADC value from the temperature sensor
  int adcVal = analogRead(PIN_LM35);
  // convert the ADC value to voltage in millivolt
  float milliVolt = adcVal * (ADC_VREF_mV / ADC_RESOLUTION);
  // convert the voltage to the temperature in Celsius
  float tempC = milliVolt / 10;
  // convert the Celsius to Fahrenheit
  float tempF = tempC * 9 / 5 + 32;
  // print the temperature in the Serial Monitor:
  Serial.print("Temperature: ");
  Serial.print(tempC);   // print the temperature in Celsius
  Serial.print("°C");
  Serial.print("  ~  "); // separator between Celsius and Fahrenheit
  Serial.print(tempF);   // print the temperature in Fahrenheit
  Serial.println("°F");

  Serial.print("Measured distance: ");
  Serial.println(readDistanceCM());
  delay(100);


  if(isNearby){
    digitalWrite(LedGreen, HIGH);
    delay(100);
    if(tempC>20 && tempC<=30){
      digitalWrite(LedBlue, HIGH);
      delay(100);
      if(val == HIGH){
        digitalWrite(LedRed, HIGH);  // turn LED ON
        if (pirState == LOW) {
        // we have just turned on
          Serial.println("Movimiento detectado!");
        // We only want to print on the output change, not state
          delay(100);
          pirState = HIGH;
          
        }
        else {
          digitalWrite(LedRed, LOW); // turn LED OFF
          if (pirState == HIGH) {
          // we have just turned of
            Serial.println("Fin de movimiento!");
          // We only want to print on the output change, not state
            pirState = LOW;
            
          }
        }
      }
    }
  }
  else{
      digitalWrite(LedRed, HIGH);
      delay(100);
      if(tempC>30){
        digitalWrite(LedGreen, HIGH);
        delay(100);
      }
  }



  delay(1000);
}