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

#define BLYNK_TEMPLATE_ID "TMPLihC17efn"
#define BLYNK_DEVICE_NAME "Ketinggian Air"
#define BLYNK_AUTH_TOKEN "xlRqClq2J-5qLNDI91wBjt3NeruwLR6o"

#define LED_merah 4
#define LED_kuning 5
#define LED_hijau 18

#define echo 2
#define trig 15

#define BLYNK_PRINT Serial

char auth[] = "xlRqClq2J-5qLNDI91wBjt3NeruwLR6o";
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

BlynkTimer timer;

void setup()
{
  Serial.begin(9600);
  Blynk.begin(auth, ssid, pass);
  timer.setInterval(2000L, sendSensor);

  //LED
  pinMode(LED_merah, OUTPUT);
  pinMode(LED_kuning, OUTPUT);
  pinMode(LED_hijau, OUTPUT);

  digitalWrite(LED_merah, LOW);
  digitalWrite(LED_kuning, LOW);
  digitalWrite(LED_hijau, LOW);

  pinMode(trig, OUTPUT);
  pinMode(echo, INPUT);
}

float distance() {
  digitalWrite(trig, LOW);
  delayMicroseconds(2);
  digitalWrite(trig, HIGH);
  delayMicroseconds(10);
  digitalWrite(trig, LOW);
  int duration = pulseIn(echo, HIGH);
  return duration * 0.034 / 2;
}

void sendSensor()
{

float jarak = distance();

  Blynk.virtualWrite(V0, jarak);
  Blynk.virtualWrite(V1, jarak);

  Serial.println("Ketinggian Air");
  Serial.println(jarak,0);

  if(jarak < 100){
    
    digitalWrite(LED_merah, HIGH);
    digitalWrite(LED_kuning, LOW);
    digitalWrite(LED_hijau, LOW);

    Blynk.virtualWrite(V0, jarak);
    Blynk.virtualWrite(V1, jarak);

    Serial.println("Ketinggian Air");
    Serial.println(jarak,0);

  }else if (jarak > 100 && jarak < 150){

    digitalWrite(LED_merah, LOW);
    digitalWrite(LED_kuning, HIGH);
    digitalWrite(LED_hijau, LOW);

    Blynk.virtualWrite(V0, jarak);
    Blynk.virtualWrite(V2, jarak);

    Serial.println("Ketinggian Air");
    Serial.println(jarak,0);

  }else if ( jarak > 150){

    digitalWrite(LED_merah, LOW);
    digitalWrite(LED_kuning, LOW);
    digitalWrite(LED_hijau, HIGH);

    Blynk.virtualWrite(V0, jarak);
    Blynk.virtualWrite(V3, jarak);

    Serial.println("Ketinggian Air");
    Serial.println(jarak,0);

  }  
}

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