#define BLYNK_TEMPLATE_ID "TMPLrAlSbnJ2"
#define BLYNK_TEMPLATE_NAME "DHT22"
#define BLYNK_AUTH_TOKEN "ACEmTQYCH2169pLHgAzMpLzhMPM2ojYV"

#define BLYNK_PRINT Serial

#define ledRed 13
#define ledYellow 12
#define ledGreen 14
#define pinEcho 2
#define pinTrigger 15

// Libraries
#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>

BlynkTimer timer;

char auth[] = "ACEmTQYCH2169pLHgAzMpLzhMPM2ojYV";
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

// Fungsi setup
void setup() {
  Serial.begin(115200);
  Serial.println("Selamat datang pada sistem tandon air otomatis");
  Blynk.begin(auth, ssid, pass);

  // Konfigurasi pin
  pinMode(pinEcho, INPUT);
  pinMode(pinTrigger, OUTPUT);
  pinMode(ledRed, OUTPUT);
  pinMode(ledYellow, OUTPUT);
  pinMode(ledGreen, OUTPUT);
}

// Fungsi pembacaan sensor ultrasonik
float readUltrasonic() {
  digitalWrite(pinTrigger, LOW);
  delayMicroseconds(2);
  digitalWrite(pinTrigger, HIGH);
  delayMicroseconds(10);
  digitalWrite(pinTrigger, LOW);

  int duration = pulseIn(pinEcho, HIGH);
  float dist_cm = duration * 0.034 / 2;
  return dist_cm;
}

// Fungsi utama (loop)
void loop() {
  float waterLevel = readUltrasonic();
  Serial.println("Batas Ketinggian Air adalah: ");
  Serial.println(waterLevel);

  if (waterLevel > 150) {
    digitalWrite(ledGreen, HIGH);
    digitalWrite(ledYellow, LOW);
    digitalWrite(ledRed, LOW);
  } 
  else if (waterLevel > 100 && waterLevel <= 150) {
    digitalWrite(ledYellow, HIGH);
    digitalWrite(ledGreen, LOW);
    digitalWrite(ledRed, LOW);
  } 
  else if (waterLevel <= 50) {
    digitalWrite(ledRed, HIGH);
    digitalWrite(ledGreen, LOW);
    digitalWrite(ledYellow, LOW);
  }

  Blynk.virtualWrite(V0, waterLevel);
  Blynk.run();
  // timer.run(); // Bila ingin menggunakan fungsi timer
}