#define BLYNK_TEMPLATE_ID "TMPL6opduA9Le"
#define BLYNK_TEMPLATE_NAME "Toilet Paper detection system"
#define BLYNK_AUTH_TOKEN "fc6i8GZauJzea_6fTz85U_Gg1F2cNj5K"
#define BLYNK_PRINT Serial

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


char auth[] = BLYNK_AUTH_TOKEN ; //Auth Token

char ssid[] = "Wokwi-GUEST"; //nama hotspot yang digunakan
char pass[] = ""; //password hotspot yang digunakan



int duration;
int distance;
#define  trig  4
#define  echo  2

WidgetLED led1(V1);

BlynkTimer timer;

void sonardata()
{
  digitalWrite(trig, LOW);   // Makes trigPin low
  delayMicroseconds(2);       // 2 micro second delay

  digitalWrite(trig, HIGH);  // tigPin high
  delayMicroseconds(10);      // trigPin high for 10 micro seconds
  digitalWrite(trig, LOW);   // trigPin low

  duration = pulseIn(echo, HIGH);   //Read echo pin, time in microseconds
  distance = duration * 0.034 / 2;   //Calculating actual/real distance

  Serial.print("Distance = ");        //Output distance on arduino serial monitor
  Serial.println(distance);



if(distance>80 && distance<120)
{
    Serial.println("full toilet paper"); 
    Blynk.logEvent("paper_out","full paper");


}

else if(distance>120 && distance<160)
{
    Serial.println("half toilet roll"); 
        led1.on();
        delay(500);
     led1.off();


}

else if(distance>160 && distance<180)
{
  Serial.println("out of toilet paper"); 
}

  Blynk.virtualWrite(V3,distance);
  
  }

  


void setup()
{
Serial.begin(115200); //serial monitor menggunakan bautrate 9600
pinMode(trig, OUTPUT);  // Sets the trigPin as an Output
  pinMode(echo, INPUT);   // Sets the echoPin as an Inpu

Blynk.begin(auth, ssid, pass); //memulai Blynk

timer.setInterval(1000, sonardata);

}

void loop()
{

 Blynk.run(); //menjalankan blynk
timer.run(); //menjalankan tim

}