#define BLYNK_TEMPLATE_ID "TMPLFH-vhHFB"
#define BLYNK_TEMPLATE_NAME "SENSOR ULTRASONIC 1"
#define BLYNK_AUTH_TOKEN "PpwLwtfpERK24HCC4pAtm39bzHzXLWfE"
#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[]="PpwLwtfpERK24HCC4pAtm39bzHzXLWfE";
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(V0, waterLevel);
    }
    else if(waterLevel >100 && waterLevel <150 ){
      digitalWrite(ledGreen, HIGH);
      digitalWrite(ledYellow, LOW);
      digitalWrite(ledRed, LOW);
      Blynk.virtualWrite(V0, waterLevel);
    }
    else if(waterLevel <=50 ){
      digitalWrite(ledGreen, HIGH);
      digitalWrite(ledYellow, LOW);
      digitalWrite(ledRed, LOW);
      Blynk.virtualWrite(V0, waterLevel);
    }
    Blynk.run();
  }