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

// Set the LCD number of columns and rows
int lcdColumns = 16;
int lcdRows = 2;

// Set LCD address, number of columns and rows
// If you don't know your display address, run an I2C scanner sketch
LiquidCrystal_I2C lcd(0x27, lcdColumns, lcdRows);

// Define the DHT sensor pin
const int dhtPin = 2;
// Initialize DHT sensor
DHT dht(dhtPin, DHT21);

// Mendefinisikan pin sensor cahaya
const int lightSensorPin = 3;
// Mendefinisikan pin sensor hujan
const int rainSensorPin = 4;
// Mendefinisikan pin relay untuk lampu
const int lampRelayPin = 5;
// Mendefinisikan pin untuk mengontrol motor (IN1, IN2)
const int motorIn1Pin = 6;
const int motorIn2Pin = 7;

// Variables to track the last state
bool lastRainSensorValue = HIGH;
bool lastLightSensorValue = LOW;
bool motorRunning = false;

void setup() {
  // Initialize LCD
  Serial.begin(9600);
  lcd.init();
  // Turn on LCD backlight
  lcd.backlight();
  dht.begin();
  // Mengatur pin sensor hujan sebagai input
  pinMode(rainSensorPin, INPUT);

  // Mengatur pin relay untuk lampu sebagai output
  pinMode(lampRelayPin, OUTPUT);
  // Matikan lampu secara default
  digitalWrite(lampRelayPin, LOW);

  // Mengatur pin untuk mengontrol motor sebagai output
  pinMode(motorIn1Pin, OUTPUT);
  pinMode(motorIn2Pin, OUTPUT);
  stopMotor();
}

void stopMotor() {
  digitalWrite(motorIn1Pin, LOW);
  digitalWrite(motorIn2Pin, LOW);
}

void loop() {
  // Read temperature and humidity from DHT sensor
  float temperatureC = dht.readTemperature();
  float humidity = dht.readHumidity();

  // Check if DHT sensor reading is successful
  if (isnan(temperatureC) || isnan(humidity)) {
    // Print error message if reading failed
    Serial.println(F("Gagal Baca Data DHT sensor!"));
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Failed to read DHT");
    lcd.setCursor(0, 1);
    lcd.print("sensor data!");
    delay(2000);
    return;
  }
  
  Serial.print("Kelembaban: ");
  Serial.println(humidity);
  Serial.print("Suhu: ");
  Serial.println(temperatureC);

  // Membaca nilai dari sensor hujan
  int rainSensorValue = digitalRead(rainSensorPin);

  // Membaca nilai dari sensor cahaya
  int lightSensorValue = digitalRead(lightSensorPin);

  // Clear LCD sebelum menampilkan data baru
  lcd.clear();

  // Check if the motor needs to run based on the sensor values and only run it once
  if (!motorRunning && (rainSensorValue == LOW || lightSensorValue == HIGH)) {
    // Putar motor searah jarum jam (clockwise)
    digitalWrite(motorIn1Pin, HIGH);
    digitalWrite(motorIn2Pin, LOW);
    delay(2000); // Gerakkan motor selama 2 detik
    stopMotor();
    motorRunning = true; // Set motor running flag
    lcd.setCursor(9, 0);
    lcd.print("M: CW "); // Print status motor
  } else if (!motorRunning && (rainSensorValue != LOW && lightSensorValue != HIGH)) {
    // Putar motor berlawanan arah jarum jam (counter-clockwise)
    digitalWrite(motorIn1Pin, LOW);
    digitalWrite(motorIn2Pin, HIGH);
    delay(2000); // Gerakkan motor selama 2 detik
    stopMotor();
    motorRunning = true; // Set motor running flag
    lcd.setCursor(9, 0);
    lcd.print("M: CCW "); // Print status motor
  }

  // Kontrol lampu berdasarkan kondisi suhu, hujan, dan cahaya
  if (temperatureC < 25 || rainSensorValue == LOW || lightSensorValue == HIGH) {
    // Hidupkan lampu jika suhu < 45, atau hujan terdeteksi, atau cuaca gelap
    digitalWrite(lampRelayPin, LOW);
    lcd.setCursor(8, 1);
    lcd.print("L: ON"); // Print status lampu
  } else {
    // Matikan lampu jika kondisi lain
    digitalWrite(lampRelayPin, HIGH);
    lcd.setCursor(8, 1);
    lcd.print("L: OFF"); // Print status lampu
  }

  // Tampilkan status suhu, hujan, lampu, dan motor di LCD
  lcd.setCursor(0, 0);
  lcd.print("Suhu:");
  lcd.print(temperatureC);
  lcd.print("C");

  lcd.setCursor(0, 1);
  lcd.print("Rain:");
  if (rainSensorValue == LOW) {
    lcd.print("Yes");
  } else {
    lcd.print("No");
  }

  // Reset the motorRunning flag if conditions have changed
  if ((lastRainSensorValue != rainSensorValue) || (lastLightSensorValue != lightSensorValue)) {
    motorRunning = false;
  }

  // Update the last sensor values
  lastRainSensorValue = rainSensorValue;
  lastLightSensorValue = lightSensorValue;

  delay(2000);
}