#define BLYNK_PRINT Serial
#define BLYNK_TEMPLATE_ID "TMPL6MD1bEnHU"
#define BLYNK_TEMPLATE_NAME "test1"
#define BLYNK_AUTH_TOKEN "gWAIe5Y5uP5Ly7xNlYM0l6kfsYg0mQ__"


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

#define TRIG_PIN 13
#define ECHO_PIN 12
#define BUZZER_PIN 19

LiquidCrystal_I2C lcd(0x27, 16, 2);  // Alamat I2C LCD 16x2
const int thresholdHeight = 30;  // Ambang batas level air rendah (dalam cm)

char ssid[] = "Wokwi-GUEST";
char pass[] = "";
BlynkTimer timer;


void setup() {
  Serial.begin(115200);
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
  pinMode(BUZZER_PIN, OUTPUT);

  lcd.init();
  lcd.backlight();
  lcd.setCursor(0, 0);
  lcd.print("TANGKI AIR");

  Blynk.begin(BLYNK_AUTH_TOKEN, ssid, pass);
  timer.setInterval(1000L, sendData);
}

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

void sendData() 
{
  long duration, distance;
  
  // Mengirim pulsa ultrasonik
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);
  
  // Menghitung durasi echo
  duration = pulseIn(ECHO_PIN, HIGH);
  
  // Menghitung jarak (dalam cm)
  distance = duration * 0.034 / 2;

  // Menampilkan hasil pada LCD
  lcd.setCursor(0, 1);
  lcd.print("Ketinggian: ");
  lcd.print(distance);
  lcd.print(" cm   ");
  
  // Cek level air
  if (distance < thresholdHeight) {
    digitalWrite(BUZZER_PIN, HIGH);  // Nyalakan buzzer
  } else {
    digitalWrite(BUZZER_PIN, LOW);   // Matikan buzzer
  }

  Blynk.virtualWrite(V0, distance);



  delay(1000);  // Delay sebelum pengukuran berikutnya
}