#include <Servo.h>
#include <SPI.h>
#include <MFRC522.h>
#define SS_PIN 10
#define RST_PIN 9
#define servoPin 3
Servo servo;
MFRC522 rfid(SS_PIN, RST_PIN);
String carteB= "01 02 03 04";
String carteV= "11 22 33 44";

int soldeB = 50;
int soldeV = 50;
int prix = 20;
void setup() 
{
  SPI.begin();
  rfid.PCD_Init();
  Serial.begin(9600);
  pinMode(7, INPUT); // capteur arrive en entrée
  pinMode(8, INPUT); // capteur de sort en entrée
  pinMode(2, OUTPUT); // LED Rouge en sortie
  pinMode(4, OUTPUT); // LED vert en entrée
  pinMode(3, OUTPUT);
  servo.attach(servoPin);
  servo.write(90);
  digitalWrite(2, HIGH);digitalWrite(4, LOW);
}
void loop() 
{ int b=digitalRead(8);
  if(b==1){
            Serial.println("Détection : la voiture sort");
            delay(5000);
            servo.write(90);
            digitalWrite(2, HIGH);digitalWrite(4, LOW);
          }      
  else {
         int a=digitalRead(7); 
         if(a==1){
                  Serial.println("Détection : la voiture arrivee");
                  delay(5000);
                  Serial.println("Systeme pret...");
                  Serial.println("Scanner une carte...");
                }
                  if (!rfid.PICC_IsNewCardPresent()) return;
                  if (!rfid.PICC_ReadCardSerial()) return;
                  String uid = "";
                  for (byte i = 0; i < rfid.uid.size; i++)
                  {
                    if (rfid.uid.uidByte[i] < 0x10) uid += "0";
                    uid += String(rfid.uid.uidByte[i], HEX);
                    if (i != rfid.uid.size - 1) uid += " ";
                  }
                    uid.toUpperCase();
                    Serial.print("UID: ");
                    Serial.println(uid);
                    delay(5000);
                  if (uid == carteB)
                  { if (soldeB >= prix)
                    {   Serial.println("Acces autorise");
                        soldeB-= prix; 
                        servo.write(0);
                        digitalWrite(2, LOW);digitalWrite(4, HIGH);}
                    else {Serial.println("Acces refusé");}}
                  if (uid == carteV)
                  { if (soldeV >= prix)
                    {   Serial.println("Acces autorise");
                        soldeV-= prix; 
                        servo.write(0);
                        digitalWrite(2, LOW);digitalWrite(4, HIGH);}
                    else {Serial.println("Acces refusé");}
                  }            
         }
}