//Pembuat Program: Anbi Atmaja Yahwidhi 20210130127

int ldrPin = A0;     // LDR pin
int ldrVal = 0;      // Value of LDR
int ledPin2 = 2;     // Build in LED pin
int ledPin3 = 3;     // Build in LED pin
int ledPin4 = 4;     // Build in LED pin

#include "DHT.h"             // Library untuk sensor DHT
#define dhtPin 12           // data pin

//#define dhtType DHT11        // tipe sensor: DHT 11
#define dhtType DHT11      // DHT 11 (AM2302), AM2321

//#define dhtType DHT11      // DHT 11 (AM2301)
DHT dht(dhtPin, dhtType);    // Initialise the DHT library
float humidityVal;           // humidity %
float tempValC;              // temperature in degrees Celcius

// LDR Characteristics
const float GAMMA = 0.7;
const float RL10 = 50;

void setup() {
  Serial.begin(9600);        // Initialise the serial monitor
  dht.begin();               // start with reading the DHT sensor
  pinMode(ledPin4, OUTPUT);
  pinMode(ledPin3, OUTPUT);
  pinMode(ledPin2, OUTPUT);
}
void loop() {

    ldrVal = analogRead(ldrPin); // Read the analog value of the LDR
   float voltage = ldrVal / 1024. * 5;
  float resistance = 2000 * voltage / (1 - voltage / 5);
  float lux = pow(RL10 * 1e3 * pow(10, GAMMA) / resistance, (1 / GAMMA));

  humidityVal = dht.readHumidity(); // humidity
  tempValC = dht.readTemperature();  // temperatur Celcius

 if(tempValC < 29 ){               //pengatur led
    digitalWrite(ledPin4, HIGH);
      Serial.print("Humidity: ");
      Serial.print(humidityVal);
      Serial.print(" %\t");
      Serial.print("Temperature: ");
      Serial.print(tempValC);
      Serial.println(" °C ");

    delay(4000);
    digitalWrite(ledPin4, LOW);
  }
   else{
    digitalWrite(ledPin4, LOW);
    delay(1000);
   }


  if(tempValC > 31 ){               //pengatur led
    digitalWrite(ledPin4, HIGH);
    digitalWrite(ledPin3, HIGH);
      Serial.print("Humidity: ");
      Serial.print(humidityVal);
      Serial.print(" %\t");
      Serial.print("Temperature: ");
      Serial.print(tempValC);
      Serial.println(" °C ");

    delay(4000);
    digitalWrite(ledPin4, LOW);
    digitalWrite(ledPin3, LOW);
  }
   else{
    digitalWrite(ledPin4, LOW);
    digitalWrite(ledPin3, LOW);
  delay(1000);
   }



 if (lux == 0) {             // If the LDR value is lower than 200
    digitalWrite(ledPin2, HIGH);   // Turn buildin LED on
    
  } else {
    digitalWrite(ledPin2, LOW);    // Turn buildin LED off
  }
  Serial.println(lux);      // Show the value in the serial monitor
  delay(1000);                 // Pause 1000ms
  }