#define BLYNK_PRINT Serial
#define BLYNK_TEMPLATE_ID "TMPL2OOxKnGnr"
#define BLYNK_TEMPLATE_NAME "SMART ELECTRICITY TOKEN INPUT ACCESSORY"
#define BLYNK_AUTH_TOKEN "EY0mO83fqEVRw-fkP2MYQtmz9lcVoYEN"
//BASIC CONNECTIONS
#define n1 12
#define n2 14
#define n3 27
#define n4 26
#define n5 25
#define n6 33
#define n7 32
#define n8 13 
#define n9 5 
#define n0 19
#define enter 18
#define dlt 23

unsigned int Pin[]={n0,n1,n2,n3,n4,n5,n6,n7,n8,n9,dlt,enter};

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

char auth[] = BLYNK_AUTH_TOKEN;
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

String token="00000000000000000000";
String notification;
bool state=LOW;

BLYNK_WRITE(V2) //READ NEW TOKEN
{
 String data = param.asString();
  if(data != token)
  {
    token=data;
    state=HIGH;
  }
}

void setup()
{
  Serial.begin(9600);
  for(int i=0;i<=11;i++)
    {
      pinMode(Pin[i],OUTPUT);
      digitalWrite(Pin[i],LOW);
    }
  
  Blynk.begin(auth, ssid, pass);
}

void loop()
{
 Blynk.run();
 if(state==HIGH)
 {
  enter_Token(token);
  state=LOW;
 }
 send_update();
}

void enter_Token(String mytoken)
{  
  uint8_t myDigit[20];     
  if(mytoken.length()==20)
  {
    Blynk.virtualWrite(V3,"PLEASE WAIT MOMENT...");
    for(int i=0;i<20;i++)
    {
      myDigit[i]=(mytoken.substring(i,i+1)).toInt();
    }
    for(int i=0;i<20;i++)
    {
      press(myDigit[i]);
      if(i==19)
      {
        digitalWrite(18,HIGH);
        Serial.print("enter button ");
        Serial.println(" is pressed");
        delay(500);
        digitalWrite(18,LOW);
        delay(500);
      }
    }
   notification="TOKEN APPLIED SUCCESSFULLY";
   Blynk.virtualWrite(V3,notification);
   delay(5000); 
   //Blynk.virtualWrite(V2,"ENTER TOKEN");
  }
  else
  {
    notification="TOKEN RECEIVED IS INVALID";
    Blynk.virtualWrite(V3,notification);
    delay(5000);
  }
}

void press(unsigned int pinNum) 
{
  unsigned int pinNumber;
  switch(pinNum)
  {
    case 0:
      pinNumber = n0;
      break;
    case 1:
      pinNumber = n1;
      break;
    case 2:
      pinNumber = n2;
      break;
    case 3:
      pinNumber = n3;
      break;
    case 4:
      pinNumber = n4;
      break;
    case 5:
      pinNumber = n5;
      break;
    case 6:
      pinNumber = n6;
      break;
    case 7:
      pinNumber = n7;
      break;
    case 8:
      pinNumber = n8;
      break;
    case 9:
      pinNumber = n9;
      break;
    case 10:
      pinNumber = enter;
      break;
  }
  digitalWrite(pinNumber,HIGH);
  Serial.print("pin number ");
  Serial.print(pinNum);
  Serial.println(" is pressed");
  delay(500);
  digitalWrite(pinNumber,LOW);
  delay(500);
}

void send_update() 
{
  Blynk.virtualWrite(V3,"PLEASE ENTER YOUR TOKEN AND PRESS ENTER");
  delay(500);  
}