#define BLYNK_TEMPLATE_ID "TMPL6BGFtqLJT"
#define BLYNK_TEMPLATE_NAME "ultrasonic"
#define BLYNK_AUTH_TOKEN "628LfteU17CI3AfbhBCvX6ctux6Adb18"
#define BLYNK_PRINT Serial //deklarasi untuk menampilkan keterangan mulai 
#define ledRed 13
#define ledYellow 12
#define ledGreen 14
#define pinEcho 2
#define pinTrigger 15 
//Libraries
#include <WiFi.h> //deklarasi library WiFi.h
#include <WiFiClient.h> //deklarasi library WiFiClient.h 
#include <BlynkSimpleEsp32.h> //deklarasi library blynk

BlynkTimer timer; //merubah perintah BlynkTimer menjadi "timer"

char auth[] = "628LfteU17CI3AfbhBCvX6ctux6Adb18"; //deklarasi auth token da
char ssid[] = "Wokwi-GUEST"; //ssid wifi yang digunakan
char pass[] = ""; //password wifi yang digunakan

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

void setup() {
// put your setup code here, to run once:
Serial.begin(115200);
Serial.println("Selamat datang pada sistem tandon air otomatis"); 
Blynk.begin(auth, ssid, pass); //inisialisasi komunikasi dengan server bl
//timer.setInterval(2000L); //interval pengiriman sendData dari mikrokontroller
pinMode(pinEcho, INPUT);
pinMode(pinTrigger, OUTPUT);
pinMode(ledRed, OUTPUT); 
pinMode(ledYellow, OUTPUT);
pinMode(ledGreen, OUTPUT);
}

float readUltrasonic() {
  digitalWrite(pinTrigger, LOW);
  delayMicroseconds(2);
  //trigger PIN dengan sinyal HIGH selama 10micro detik 
  digitalWrite(pinTrigger, HIGH);
  delayMicroseconds(10);
  digitalWrite(pinTrigger, LOW);

//echo PIN dengan sinyal HIGH 
int duration = pulseIn(pinEcho, HIGH);
float dist_cm = duration * 0.034 / 2;
return dist_cm;
//float dist_inch duration 0.0133 / 2;
}

void loop() {
// put your main code here, to run repeatedly: 
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(); //menjalankan perintah yang ada di library bly 
//timer.run(); //menjalankan timer dari blynk
}