Reddit LCD bar graph voltmeter 3.0

/*
  Reddit bargraph LCD voltmeter - version 3.0 - 11 October 2019

  This should print the volts value on line 1.
  The second line should be a left-to-right bar graph between two left and right pointers:
  >>###########<<

*/


#include <LiquidCrystal.h>
int Vpin = 0;
float voltaje;
float V;
LiquidCrystal lcd(7, 6, 5, 4, 3, 2);  // pines RS, E, D4, D5, D6, D7 de modulo 1602A



byte DIV_0_OF_5[8] = { // This is really the same as printing a space [ ]
  0b00000,
  0b00000,
  0b00000,
  0b00000,
  0b00000,
  0b00000,
  0b00000,
  0b00000
}; // 0 / 5

byte DIV_1_OF_5[8] = {
  0b10000,
  0b10000,
  0b10000,
  0b10000,
  0b10000,
  0b10000,
  0b10000,
  0b10000
}; // 1 / 5

byte DIV_2_OF_5[8] = {
  0b11000,
  0b11000,
  0b11000,
  0b11000,
  0b11000,
  0b11000,
  0b11000,
  0b11000
}; // 2 / 5

byte DIV_3_OF_5[8] = {
  0b11100,
  0b11100,
  0b11100,
  0b11100,
  0b11100,
  0b11100,
  0b11100,
  0b11100
}; // 3 / 5

byte DIV_4_OF_5[8] = {
  0b11110,
  0b11110,
  0b11110,
  0b11110,
  0b11110,
  0b11110,
  0b11110,
  0b11110
}; // 4 / 5

byte DIV_5_OF_5[8] = {
  0b11111,
  0b11111,
  0b11111,
  0b11111,
  0b11111,
  0b11111,
  0b11111,
  0b11111
}; // 5 / 5

byte right_pointer[8] = {
  0b11000,
  0b01100,
  0b00110,
  0b00011,
  0b00011,
  0b00110,
  0b01100,
  0b11000
}; // A character like this >>

byte left_pointer[8] = {
  0b00011,
  0b00110,
  0b01100,
  0b11000,
  0b11000,
  0b01100,
  0b00110,
  0b00011
}; // A character like this <<



/**
   Fonction de configuration de l'écran LCD pour la barre de progression.
   Utilise les caractéres personnalisés de 0 à 5 (6 et 7 restent disponibles).
*/

// You can use the function below, but it must be called in setup() after the lcd.begin() call.
void setup_progressbar() {

  /* Enregistre les caractères personnalisés dans la mémoire de l'écran LCD */
  lcd.createChar(0, DIV_0_OF_5);
  lcd.createChar(1, DIV_1_OF_5);
  lcd.createChar(2, DIV_2_OF_5);
  lcd.createChar(3, DIV_3_OF_5);
  lcd.createChar(4, DIV_4_OF_5);
  lcd.createChar(5, DIV_5_OF_5);
  lcd.createChar(6, right_pointer);
  lcd.createChar(7, left_pointer);
}


void setup() {
  lcd.begin(16, 2);     // inicializa a display de 16 columnas y 2 lineas
  lcd.clear(); // to clear any possible random chars from starting up
  setup_progressbar();

  // Writing to an LCD takes time, so you want to avoid re-writing characters that will not change.

  // The characters below will not change, so they don't need to be re-written.
  lcd.setCursor(0, 0);
  lcd.print("SondaV= "); // The start position for V value is (8,0)
  lcd.setCursor(0, 1); // This should be the left-most character on line 2.
  lcd.write(byte(6));
  lcd.setCursor(13, 1); // This should be the char at the right end of the bar code range.
  lcd.write(byte(7));
}

void loop() {

  voltaje = analogRead (Vpin);
  V = voltaje / 1024 * 5.0;
  lcd.setCursor(8, 0);
  lcd.print("       ");
  lcd.setCursor(8, 0);
  lcd.print(V);
  display_bargraph1();
  delay(500);

}


void display_bargraph1() {
  lcd.setCursor(1, 1);
  // 1.1 voltage, .2 char divisions, displayed over 11 chars,,,,
  float base_voltage = 0;
  for (int i = 1; i <= 11; i++) {
    if (V >= (base_voltage + 1)) {
      lcd.write(byte(5));
    }
    else if (V >= (base_voltage + .08)) {
      lcd.write(byte(4));
    }
    else if (V >= (base_voltage + .06)) {
      lcd.write(byte(3));
    }
    else if (V >= (base_voltage + .04)) {
      lcd.write(byte(2));
    }
    else if (V >= (base_voltage + .02)) {
      lcd.write(byte(1));
    }
    else {
      lcd.write(" "); // This just writes a regular space.
      // Or, you could use custom character (zero) below--
      //lcd.write(byte(0)); // ------------------> but this is the same as printing a space.
    }
    base_voltage = base_voltage + .1;
  }
}




// ~~~~~~~~ the end ~~~~~~~~~