#define BLYNK_TEMPLATE_ID "TMPL6PMCSycPq"
#define BLYNK_TEMPLATE_NAME "PPM2024"
#define BLYNK_AUTH_TOKEN "3Jji2zBa9xhCwYlxUv8nwoobDsEGRB79"

#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>
#include <DHT.h>
#include <LiquidCrystal_I2C.h>

// Blynk authorization token
char auth[] = BLYNK_AUTH_TOKEN;
// WiFi credentials
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

// DHT sensor setup
#define DHTPIN 15          // DHT22 connected to GPIO 23
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);

// LDR setup
//#define LDR_PIN 34        // LDR connected to GPIO 34

// Relay setup
// #define RELAY1_PIN 25     // Relay 1 connected to GPIO 25
#define RELAY2_PIN 26     // Relay 2 connected to GPIO 26
#define RELAY3_PIN 27     // Relay 3 connected to GPIO 27

const float GAMMA = 0.7;
const float RL10 = 33;

const int RELAY1_PIN = 25; // Pin connected to the relay module

//LCD
#include <LiquidCrystal_I2C.h>
// set the LCD number of columns and rows
int lcdColumns = 16;
int lcdRows = 2;
LiquidCrystal_I2C lcd(0x27, lcdColumns, lcdRows);  


void setup() {
  Serial.begin(115200);
  Blynk.begin(auth, ssid, pass);
  dht.begin();
  lcd.init();                // Initialize the LCD
  lcd.backlight();           // Turn on the backlight
 //pinMode(LDR_PIN, INPUT);
  pinMode(RELAY1_PIN, OUTPUT);
  pinMode(RELAY2_PIN, OUTPUT);
  pinMode(RELAY3_PIN, OUTPUT);
}

void loop() {
  ldr();
  Blynk.run();
  lcdrun();  

  // Read temperature and humidity
  float humidity = dht.readHumidity();
  float temperature = dht.readTemperature();
  
  // Update Blynk app
  Blynk.virtualWrite(V0, temperature);
  Blynk.virtualWrite(V1, humidity);
  //delay(500); // Update every second
}

 //------------LCD---------------
 void lcdrun()
{
    // Read temperature and humidity
  float humidity = dht.readHumidity();
  float temperature = dht.readTemperature();
  lcd.clear();
  //suhu
  lcd.setCursor(0,0);
  lcd.print("Suhu      :");
  lcd.setCursor(11,0);
  lcd.print(temperature);
  lcd.setCursor(15,0);
  lcd.print("C");
  //kelembaban
  lcd.setCursor(0,1);
  lcd.print("Kelembaban:");
  lcd.setCursor(11,1);
  lcd.print(humidity);
  lcd.setCursor(15,1);
  lcd.print("%");
  delay(1500);
}

// Blynk button press handlers for Relay 2 and Relay 3
BLYNK_WRITE(V3) {
  int buttonState = param.asInt();
  digitalWrite(RELAY2_PIN, buttonState);
}

BLYNK_WRITE(V4) {
  int buttonState = param.asInt();
  digitalWrite(RELAY3_PIN, buttonState);
}

void ldr()
{
  lcd.clear();
  int analogValue = analogRead(34);
  float voltage = analogValue / 4096. * 3.3;
  float resistance = 2000 * voltage / (1 - voltage / 3.3);
  float lux = pow(RL10 * 1e3 * pow(10, GAMMA) / resistance, (1 / GAMMA));
  Serial.print("Room: ");
  if (lux < 100)
  {
    digitalWrite(RELAY1_PIN, LOW); // Turn off the relay
    Serial.print("Dark! ");
    lcd.setCursor(0,1);
    lcd.print("Dark! ");
  }
  else
  {
    digitalWrite(RELAY1_PIN, HIGH); // Turn on the relay
    Serial.print("Light  ");
    lcd.setCursor(0,1);
    lcd.print("Light ");
  }
  Serial.print("Lux: ");
  Serial.println(lux);
  lcd.setCursor(0,0);
  lcd.print("Lux :");
  lcd.setCursor(6,0);
  lcd.print(lux);
  Blynk.virtualWrite(V2, lux);
  delay(1500);
}