//Pembuat Program:Rifan Prayoga
//SOAL!
//jika suhu kurang dari 30 derajat C maka lampu 1 menyala selama 3 detik setelah itu padam, 
// jika suhu lebih dari 37 derajat C maka lampu 1 dan 2 menyala selama 6.5 detik setelah itu padam,
//dan jika sensor LDR bernilai 0 maka lampu 3 menyala selama 11 detik setelah itu padam
//setelah itu mati,
#include "DHT.h"             // Library untuk sensor DHT
#define dhtPin 12            // data pin
//#define dhtType DHT11        // tipe sensor: DHT 11
#define dhtType DHT22      // DHT 22 (AM2302), AM2321
//#define dhtType DHT21      // DHT 21 (AM2301)
DHT dht(dhtPin, dhtType);    // Initialise the DHT library
float humidityVal;           // humidity %
float tempValC;            // temperature in degrees Celcius

//Program 2
int ldrPin = A0;     // LDR pin
int ldrVal = 1;      // Value of LDR
int ledPin = 2;     // Build in LED pin
// 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(4, OUTPUT);
  pinMode(13, OUTPUT);
  //Void setup prog.2
  pinMode(2, OUTPUT);
}
void loop() {
  humidityVal = dht.readHumidity(); // humidity
  tempValC = dht.readTemperature();  // temperatur Celcius
  if(tempValC <30 ){               //pengatur led
  digitalWrite(4, HIGH);
  delay(3000);
  digitalWrite(4, LOW);
  }
  {
  
 if(tempValC >37 ){               //pengatur led
    digitalWrite(4, HIGH);
    digitalWrite(13, HIGH);
    delay(6500);
    digitalWrite(4, LOW);
    digitalWrite(13, LOW);
  }
   else{
    digitalWrite(4, LOW);
    digitalWrite(13, LOW);
  }
  // Print all values to the serial monitor, \t prints a tab character
  Serial.print("Humidity: ");
  Serial.print(humidityVal);
  Serial.print(" %\t");
  Serial.print("Temperature: ");
  Serial.print(tempValC);
  Serial.println(" °C ");
  delay(2000);
}
//prog.2
  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));

 if (lux < 200) {             // If the LDR value is lower than 200
    digitalWrite(ledPin, HIGH);   // Turn buildin LED on
    delay(11000);    //Jeda
    digitalWrite(ledPin, LOW);
  } else {
    digitalWrite(ledPin, LOW);    // Turn buildin LED off
  }
  Serial.println(lux);      // Show the value in the serial monitor
  delay(1000);                 // Pause 1000ms
}