#define BLYNK_TEMPLATE_ID "TMPLRVaQkYr8"
#define BLYNK_TEMPLATE_NAME "Ikaa Proyek Akhir"
#define BLYNK_AUTH_TOKEN "aIbN8psWYbV3_i81Odc3HfBUo3M-3lqa"
#define BLYNK_PRINT Serial
#define PIN_ECHO 2
#define PIN_TRIGGER 15
#define DHT_PIN 4
#define DHT_TYPE DHT22
#define BUZZER_PIN 5
#define LED_PIN 32      // LED control pin
#define SERVO_PIN 18
#define BUZZER_STATUS_PIN V3  // Blynk virtual pin to represent buzzer status

#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>
#include <DHT.h>
#include <ESP32Servo.h>

Servo servo;
int servoPosition = 0;
bool buzzerActive = false;
LiquidCrystal_I2C lcd(0x27, 20, 4);  // Ganti 0x27 dengan alamat I2C yang benar

DHT dht(DHT_PIN, DHT_TYPE);
BlynkTimer timer;

char auth[] = "aIbN8psWYbV3_i81Odc3HfBUo3M-3lqa";
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

void setup() {
  Wire.begin();
  Serial.begin(115200);
  Serial.println("Hello, User!");

  Blynk.begin(auth, ssid, pass);
  pinMode(PIN_ECHO, INPUT);
  pinMode(PIN_TRIGGER, OUTPUT);
  pinMode(BUZZER_PIN, OUTPUT);
  pinMode(LED_PIN, OUTPUT);

  dht.begin();
  servo.attach(SERVO_PIN);
  lcd.begin(16, 2);
  lcd.backlight();
  delay(1000); 
  timer.setInterval(1000L, sendDHTData);
}

void loop() {
  Blynk.run();
  timer.run();

  // Read water level
  float waterLevel = 400 - readUltrasonic();
  Serial.print("Water Level: ");
  Serial.println(waterLevel);
  delay(2000);

  // Water level conditions
  if (waterLevel >= 25 && waterLevel <= 400) {
    digitalWrite(BUZZER_PIN, LOW);
    noTone(BUZZER_PIN);
    buzzerActive = false;
    Blynk.virtualWrite(BUZZER_STATUS_PIN, 0);  // Update Blynk with buzzer status
    Blynk.virtualWrite(V0, waterLevel);
  } else if (waterLevel <= 10) {
    digitalWrite(BUZZER_PIN, HIGH);
    tone(BUZZER_PIN, 200);
    delay(2000);
    tone(BUZZER_PIN, 250);
    buzzerActive = true;
    Blynk.virtualWrite(BUZZER_STATUS_PIN, 1);  // Update Blynk with buzzer status
    Blynk.virtualWrite(V0, waterLevel);
  }

  // Display temperature and humidity on LCD
   lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Temp: ");
  lcd.print(dht.readTemperature());
  lcd.print("C");

  lcd.setCursor(0, 1);
  lcd.print("Humidity: ");
  lcd.print(dht.readHumidity());
  lcd.print("%");

  delay(2000);

  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Water Level: ");
  lcd.print(waterLevel);
  lcd.print("cm");
}

void sendDHTData() {
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();

  // Print temperature and humidity
  Serial.println("---");
  Serial.print("Temp: ");
  Serial.print(temperature);
  Serial.println("°C");
  Serial.print("Humidity: ");
  Serial.print(humidity);
  Serial.println("%");


  // Update Blynk app with DHT data
  if (!isnan(temperature) && !isnan(humidity)) {
    Blynk.virtualWrite(V1, temperature);
    Blynk.virtualWrite(V2, humidity);
  }
  if (temperature > 32 ) {
    digitalWrite(LED_PIN, LOW);
  }
  else if(temperature <= 26 ) {
    digitalWrite(LED_PIN, HIGH);
  }
}

float readUltrasonic() {
  // Ultrasonic sensor reading
  digitalWrite(PIN_TRIGGER, LOW);
  delayMicroseconds(2);
  digitalWrite(PIN_TRIGGER, HIGH);
  delayMicroseconds(10);
  digitalWrite(PIN_TRIGGER, LOW);
  int duration = pulseIn(PIN_ECHO, HIGH);
  float dist_cm = duration * 0.034 / 2;
  return dist_cm;
}

BLYNK_WRITE(V4) {
  // Servo control
  int sliderValue = param.asInt();
  servoPosition = map(sliderValue, 0, 100, 0, 180);
  servo.write(servoPosition);
}

BLYNK_WRITE(V5) {
  // LED control using Blynk Button widget on Virtual Pin V6
  int ledState = param.asInt();
  digitalWrite(LED_PIN, ledState);
}