#define BLYNK_TEMPLATE_ID "TMPL6S6vPAIVk"
#define BLYNK_TEMPLATE_NAME "UltraSonic"
#define BLYNK_AUTH_TOKEN "_WJIWceCHs3XnmhTf8nUHCJ5LYL1Z7Bx"
#define BLYNK_PRINT Serial

#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[] = "_WJIWceCHs3XnmhTf8nUHCJ5LYL1Z7Bx";
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

void setup(){
  Serial.begin(115200);
  Serial.println("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(V1, waterLevel);
  }

  else if(waterLevel > 100 && waterLevel <=150){
    digitalWrite(ledYellow, HIGH);
    digitalWrite(ledGreen, LOW);
    digitalWrite(ledRed, LOW);
    Blynk.virtualWrite(V1, waterLevel);
  }

  else if(waterLevel <=50){
    digitalWrite(ledRed, HIGH);
    digitalWrite(ledGreen, LOW);
    digitalWrite(ledYellow, LOW);
    Blynk.virtualWrite(V1, waterLevel);
  }
  Blynk.run();
  timer.run();
}