#include <Wire.h>
#include <DHT.h>
#include <LiquidCrystal_I2C.h>

#define DHTPIN 15 // Pin tempat terhubungnya sensor DHT22
#define DHTTYPE DHT22 // Tipe sensor DHT yang digunakan
DHT dht(DHTPIN, DHTTYPE);

#define LDRPIN 14 // Pin tempat terhubungnya sensor LDR
#define SOILPIN 34 // Pin tempat terhubungnya sensor kelembaban tanah

LiquidCrystal_I2C lcd(0x27, 16, 2); // Alamat I2C dan ukuran LCD

float temp, hum, lux, soil;
const float gama = 0.7;
const float rl10 = 50;

void setup() {
  Serial.begin(9600);

  pinMode(LDRPIN, INPUT);
  pinMode(DHTPIN, INPUT);
  pinMode(SOILPIN, INPUT);

  Wire.begin();
  Serial.println("Smart Plant Monitoring System");
  dht.begin();
  lcd.init();
  lcd.backlight();
  
  lcd.print("Menyiapkan...");
  delay(2000);
  lcd.clear();
}

void loop() {
  //Data Sensor DHT22
  temp = dht.readTemperature();
  hum = dht.readHumidity();
  Serial.print("Suhu                : " + String(temp, 2) + " °C");
  Serial.println("Kelembaban          : " + String(hum, 1) + " %");

  //Data Sensor LDR Cahaya
  int ldrValue = analogRead(LDRPIN);
  ldrValue = map(ldrValue, 4095, 0, 1024, 0); //mengubah nilai pembacaan sensor LDR dari nilai ADC arduino menjadi nilai ADC ESP32
  float ldrVoltage = ldrValue / 1024.*5;
  float ldrResistance = 2000 * ldrVoltage / (1-ldrVoltage/5);
  lux = pow(rl10*1e3*pow(10,gama)/ldrResistance,(1/gama));
  Serial.println("Kecerahan           : " + String(lux, 3) + " Lux");
  String luxmsg = lux < 807 ? "Kurang" : lux > 808 && lux < 1614? "Medium" : "Tinggi";

  //Data Sensor Soil Moisture
  int16_t i = analogRead(SOILPIN);
  String msg = i < 2165 ? "WET" : i > 3135 ? "DRY" : "OK";
  //Relay untuk air berdasarkan kondisi soil moisture



  // Kondisi Tanah
  lcd.setCursor(0,0);
lcd.print("Tanah:");
lcd.setCursor(9,0);
lcd.print(msg);

if (lux < 807){
    lcd.setCursor(0,1);
    lcd.print("Kecerahan: ");
    lcd.setCursor(10,1);
    lcd.print(luxmsg);
}
else if (lux > 808 && lux < 1614){
    lcd.setCursor(0,1);
    lcd.print("Kecerahan: ");
    lcd.setCursor(10,1);
    lcd.print(luxmsg);
}
else{
    lcd.setCursor(0,1);
    lcd.print("Kecerahan: ");
    lcd.setCursor(10,1);
    lcd.print(luxmsg);
}
delay(2000);

// Suhu
lcd.clear();
lcd.setCursor(0,0);
lcd.print("Suhu :");
lcd.setCursor(10,0);
lcd.print(temp);
lcd.setCursor(14,0);
lcd.print("C");
delay(2000);

// Kelembaban
lcd.clear();
lcd.setCursor(0,0);
lcd.print("lembap :");
lcd.setCursor(10,0);
lcd.print(hum);
lcd.setCursor(14,0);
lcd.print("%");
delay(2000);

  // Kirim data ke serial monitor (opsional)
  Serial.println("--------------");
  delay(2000); 
  lcd.clear();
  delay(2000);
  lcd.clear();
}