#define BLYNK_TEMPLATE_ID "TMPL6OSgad4ml"
#define BLYNK_TEMPLATE_NAME "DHT22"
#define BLYNK_AUTH_TOKEN "Zh-X8ywnuFEUJnzDFyRRt4xSaS102mOU"

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

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

BlynkTimer timer;

char auth[] = "Zh-X8ywnuFEUJnzDFyRRt4xSaS102mOU";
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Annyeong, Selamat datang pada sistem tandon air otomatis!");
  Blynk.begin(auth, ssid, pass);

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

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;
}

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);
    Blynk.virtualWrite(V0, waterLevel);
  }

  else if(waterLevel > 100 && waterLevel <= 150){
    digitalWrite(ledYellow, HIGH);
    digitalWrite(ledGreen, LOW);
    digitalWrite(ledRed, LOW);
    Blynk.virtualWrite(V0, waterLevel);
  }

  else if(waterLevel <=50){
    digitalWrite(ledRed, HIGH);
    digitalWrite(ledGreen, LOW);
    digitalWrite(ledYellow, LOW);
    Blynk.virtualWrite(V0, waterLevel);
  }
  Blynk.run();
}