#define BLYNK_PRINT Serial


#define BLYNK_TEMPLATE_ID "TMPLoqZvA84S"
#define BLYNK_TEMPLATE_NAME "Ketinggian Air Sungai"



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

#define EchoPin 2
#define TrigPin 15
#define ledRed 14
#define ledYellow 12
#define ledGreen 13

long duration;
int distance;

char auth[] = "0hOeTzBbBiq3wMDuqWwJdVoCpJREeYmP";
char ssid[] = "Wokwi-GUEST";
char pass[] = "";
BlynkTimer timer;




void setup()
{
  Serial.begin(9600);
  pinMode(TrigPin, OUTPUT);
  pinMode(EchoPin, INPUT);
  pinMode(ledRed, OUTPUT);
  pinMode(ledYellow, OUTPUT);
  pinMode(ledGreen, OUTPUT);

  Blynk.begin(auth, ssid, pass);
  
  timer.setInterval(2000L, sendSensor);
}

void sendSensor () {
  digitalWrite(TrigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(TrigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(TrigPin, LOW);
  duration = pulseIn(EchoPin, HIGH);
  distance = duration * 0.034 / 2;
  Blynk.virtualWrite(V0, distance);
}

void loop() {
  Serial.print("Ketinggian Air: ");
  Serial.println(distance);

  if(distance >=150){
    digitalWrite(ledRed, LOW);
    digitalWrite(ledYellow,LOW);
    digitalWrite(ledGreen, HIGH);
    delay(10);
  }
  else if (distance < 150 && distance >= 100){
    digitalWrite(ledRed, LOW);
    digitalWrite(ledYellow,HIGH);
    digitalWrite(ledGreen, LOW);
    delay(10);
  }
  else if (distance < 100){
    digitalWrite(ledRed, HIGH);
    digitalWrite(ledYellow,LOW);
    digitalWrite(ledGreen, LOW);
    delay(10);
  }
  else {
    digitalWrite(ledRed, LOW);
    digitalWrite(ledYellow,LOW);
    digitalWrite(ledGreen, LOW);
    delay(10);
  }



  Blynk.run();
  timer.run();
}