#define BLYNK_PRINT Serial
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 16, 2); 
#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>
#include "DHTesp.h"

int relaypin = 26;
int lightSensorPin = 36;
int buzzerPin = 18;
int ledPin = 5;

char auth[] = "XlT19o6qkXOFQ4pKTm7s-w5NchDmVQE_";
char pass[] = "";
char ssid[] = "Wokwi-GUEST";
char domain[] = "iot.amikom.ac.id";

const int DHT_PIN = 15;
const float GAMMA = 0.7;
const float RL10 = 50;

DHTesp dhtSensor;

void setup() {
  Serial.begin(115200);
  pinMode(buzzerPin, OUTPUT);
  pinMode(ledPin, OUTPUT);
  pinMode(relaypin, OUTPUT);
  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);
  Blynk.begin(auth, ssid, pass, domain, 8080);
  lcd.init();
  lcd.backlight();
}

void loop() {
  int analogValue = analogRead(lightSensorPin);
  float voltage = analogValue * 5 / 4095.0;
  float resistance = 2000 * voltage / (1 - voltage / 5);
  float lux = pow(RL10 * 1e3 * pow(10, GAMMA) / resistance, (1 / GAMMA));
  Serial.print("Lux: ");
  Serial.println(lux);
  Blynk.virtualWrite(V0, lux); 
 
  TempAndHumidity data = dhtSensor.getTempAndHumidity();
  float temperature = data.temperature;  
  if (temperature > 32 && lux > 100) {
    lcd.setCursor(0, 0);
    lcd.print("BAHAYA API!!!");
    lcd.setCursor(0, 1);
    lcd.print("Air Menyala");
    digitalWrite(ledPin, HIGH);
    digitalWrite(relaypin, HIGH);
    tone(buzzerPin, 165);

  } else {
    lcd.setCursor(0, 0);
    lcd.print("AMAN");
    lcd.setCursor(0, 1);
    lcd.print("TIDAK ADA API");
    digitalWrite(ledPin, LOW);
    digitalWrite(relaypin, LOW);
    noTone(buzzerPin);
  }

  Serial.println("Temp: " + String(temperature, 2) + "°C");
  Serial.println("Humidity: " + String(data.humidity, 1) + "%");
  Serial.println("---");
  Blynk.virtualWrite(V1, temperature);
  Blynk.virtualWrite(V2, data.humidity);

  lcd.setCursor(0, 0);
  lcd.print("Temp: " + String(temperature, 2) + " C");
  lcd.setCursor(0, 1);
  lcd.print("Humi: " + String(data.humidity, 1) + "  %");

  delay(1000);
  lcd.clear();
}