#include <Wire.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);

int a = 25, b = 14, c = 26, d = 27;
int A, B, C, D;
int compteur1 = 0;
int compteur2 = 0;
int compteur3 = 0;
int compteur4 = 0;
int precedent1 = 0;
int precedent2 = 0;
int precedent3 = 0;
int precedent4 = 0;
bool ecranEfface = 0;

void setup() {
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(a, INPUT);
  pinMode(b, INPUT);
  pinMode(c, INPUT);
  pinMode(d, INPUT);
  lcd.init();
  lcd.backlight();
  delay(500);
  lcd.setCursor(0, 0);
  lcd.print("CoinCounter Pro");
  lcd.setCursor(0, 1);
  lcd.print("BTS SE");
}

void detection(int pin, int &precedent, int &compteur, const char* piece, int col, int lin) 
{
  int etatCapteur = digitalRead(pin);

  if (etatCapteur == 1 && precedent == 0) {
    precedent = 1;
    compteur++;
        if (!ecranEfface) {
          lcd.clear();
          ecranEfface = true;}
    lcd.setCursor(col, lin);
    lcd.print(piece);
    lcd.setCursor(col + strlen(piece), lin);
    lcd.print(compteur);
  } else if (etatCapteur == 0) {
    precedent = 0;
  }
}

void loop() 
{
  A = digitalRead(a);
  B = digitalRead(b);
  C = digitalRead(c);
  D = digitalRead(d);

  detection(a, precedent1, compteur1, "0.5:", 0, 0);
  detection(b, precedent2, compteur2, "1:", 11, 0);
  detection(c, precedent3, compteur3, "5:", 0, 1);
  detection(d, precedent4, compteur4, "10:", 11, 1);

  delay(10); // this speeds up the simulation
}