//Rapaen Uberto Manalu

#include<DHT.h>
#define TRIG_PIN A1 
#define ECHO_PIN A0 
#define led_R 2 
#define led_Y 3 
#define buzzer 8 
#define DHTTYPE DHT22
#define DHT_22 4
long duration, distance; // variabel durasi dan jarak

DHT dht (DHT_22, DHTTYPE);

float temp;
float hum;

long ultrasonic() //SENSOR ULTRASONIC
{
 digitalWrite(TRIG_PIN,LOW);
 delayMicroseconds(2);
 digitalWrite(TRIG_PIN,HIGH);
 delayMicroseconds(10);
 duration=pulseIn (ECHO_PIN,HIGH);
 return duration / 29 / 2; 
}

void setup() {
  // put your setup code here, to run once:
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
  pinMode(led_R, OUTPUT);
  pinMode(led_Y, OUTPUT);
  pinMode(buzzer, OUTPUT);
  Serial.begin(9600);
  dht.begin();

}

void loop() {
  // put your main code here, to run repeatedly:
  hum = dht.readHumidity(); //DHT22
  temp = dht.readTemperature();

  distance = ultrasonic(); //Ultrasonic
  Serial.print("Distance: ");
  Serial.println(distance);

  Serial.print("Temperature: ");
  Serial.println(temp);
  
  Serial.print("Humidity: ");
  Serial.println(hum);
  delay(1000);

  if(distance <= 50 && hum <= 40){
    digitalWrite(led_R, HIGH);
    delay(500);
    digitalWrite(led_Y, HIGH);
    delay(3000);
    digitalWrite(buzzer, HIGH);
    //delay(1000);
  }
  else if (distance <= 50 && temp <= 30){
    digitalWrite(led_Y, HIGH);
    delay(2000);
    digitalWrite(led_R, HIGH);
    delay(3000);
    digitalWrite(buzzer, HIGH);
    //delay(5000);
  }
  else{
    digitalWrite(led_Y, HIGH);
    delay(500);
    digitalWrite(led_R, HIGH);
    digitalWrite(led_Y, LOW);
    delay(500);
    digitalWrite(led_R, LOW);
    digitalWrite(led_Y, HIGH);
    digitalWrite(buzzer, HIGH);
    delay(500);
    digitalWrite(buzzer, LOW);
    delay(500);
    digitalWrite(led_R, HIGH);
  }

}