#define BLYNK_TEMPLATE_ID "TMPLe8bUT8M9"
#define BLYNK_TEMPLATE_NAME "ketinggian air tandon"
#define BLYNK_AUTH_TOKEN "N-1p_qtLBctXk075gqGYnGcafQ58LAi3"
#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[] = "WkXA3rC24YOPyEGeH9ZSrV0An5ad2anR"; 
char ssid[] = "Wokwi-GUEST"; 
char pass[] = ""; 

// void sendData(){ //void untuk mengirimkan pembacaan sensor atau nilai ke blynk
//   float waterLevel = readUltrasonic();
//   float riverLevel = 300+50-waterLevel
//   Blynk.virtualWrite(V1, riverLevel); //mengirimkan data suhu ke virtual pin1 pada blynk
//   Serial.println("WaterLevel: " + String(riverLevel, 2) + " cm"); //menampilkan tulisan Temp: nilai suhu dhtC ke dalam serial monitor
//   Serial.println("------");
// }

void setup() {
  Serial.begin(115200);
  Serial.println("Hello, User!");
  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("Ketinggian Air adalah: "); 
  Serial.println(350-waterLevel);
 
  if(waterLevel > 150){
    digitalWrite(ledGreen, HIGH);
    digitalWrite(ledYellow, LOW);
    digitalWrite(ledRed, LOW);
    Blynk.virtualWrite(V1, 350-waterLevel);
  }
  else if(waterLevel >100 && waterLevel <=150 ){
    digitalWrite(ledYellow, HIGH);
    digitalWrite(ledGreen, LOW);
    digitalWrite(ledRed, LOW);
    Blynk.virtualWrite(V1, 350-waterLevel);
  }
  else if(waterLevel <=100){
    digitalWrite(ledRed, HIGH);
    digitalWrite(ledGreen, LOW);
    digitalWrite(ledYellow, LOW);
    Blynk.virtualWrite(V1, 350-waterLevel);
  }
  Blynk.run();
}