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/*

Aaron Cake, 2018
Very simple program to test RDM6300 and MFRC522 RFID readers on Arduino UNO.
Mostly a copy and paste from the MFRC522 example with added SoftwareSerial to read the RDM6300

MFRC522 Libtary: https://github.com/miguelbalboa/rfid
*
*
* Typical pin layout used:
* -----------------------------------------------------------------------------------------
*             MFRC522      Arduino       Arduino   Arduino    Arduino          Arduino
*             Reader/PCD   Uno/101       Mega      Nano v3    Leonardo/Micro   Pro Micro
* Signal      Pin          Pin           Pin       Pin        Pin              Pin
* -----------------------------------------------------------------------------------------
* RST/Reset   RST          9             5         D9         RESET/ICSP-5     RST
* SPI SS      SDA(SS)      10            53        D10        10               10
* SPI MOSI    MOSI         11 / ICSP-4   51        D11        ICSP-4           16
* SPI MISO    MISO         12 / ICSP-1   50        D12        ICSP-1           14
* SPI SCK     SCK          13 / ICSP-3   52        D13        ICSP-3           15

RDM6300
TX to Pin 2 (software serial RX)


*/

#include <SPI.h>
#include <MFRC522.h>
#include <SoftwareSerial.h>

SoftwareSerial RFID(2, 3); // RX and TX

int i;

#define RST_PIN         9          // Configurable, see typical pin layout above
#define SS_PIN          10         // Configurable, see typical pin layout above

MFRC522 mfrc522(SS_PIN, RST_PIN);  // Create MFRC522 instance

void setup() {
  Serial.begin(9600);   // Initialize serial communications with the PC
  RFID.begin(9600);   // start SoftwareSerial to RDM6300 RFID reader
  while (!Serial);    // Do nothing if no serial port is opened (added for Arduinos based on ATMEGA32U4)
  SPI.begin();      // Init SPI bus
  mfrc522.PCD_Init();   // Init MFRC522
  mfrc522.PCD_DumpVersionToSerial();  // Show details of PCD - MFRC522 Card Reader details
  Serial.println(F("Ready."));
}

void loop() {
  // Look for new cards on MFRC522
  if (!mfrc522.PICC_IsNewCardPresent()) {
    return;
  }


  // Select one of the cards on MFRC522
  if (!mfrc522.PICC_ReadCardSerial()) {
    return;
  }


  // Dump debug info about the card on MFRC522; PICC_HaltA() is automatically called, dump it to UART
  mfrc522.PICC_DumpToSerial(&(mfrc522.uid));

  //check the softwareserial port RFID for data from the RDM6300 and print to hardware UART
  if (RFID.available() > 0)
  {
    i = RFID.read();
    //Serial.print(i, DEC);
    Serial.print(i, HEX);
    Serial.print(" ");
  }


}

/*
Aaron Cake 2018

Simple RFID relay actuator. I did not code the majority of this, just got lazy and Googled for
"rfid lock code" and did a copy paste because this is just for testing. So I don't claim this code.

Software listens for a known RFID tag then activates a relay on pin 11 for 1 second.
Prone to multiple reads. Don't care as for testing. Final code will reside in car body ECU and have a timeout value
to prevent multiple reads.


*/

#include <SoftwareSerial.h>
SoftwareSerial RFID(2, 3); // RX and TX

int data1 = 0;
int ok = -1;
int yes = 11;


int tag1[14] = { 2,1,2,3,4,5,6,7,8,9,1,2,3,3 };   //tag which activates relay tag
int newtag[14] = { 0,0,0,0,0,0,0,0,0,0,0,0,0,0 }; // used for read comparisons

void setup()
{
  RFID.begin(9600);    // start serial to RFID reader
  Serial.begin(9600);  // start serial to PC 
  pinMode(yes, OUTPUT); // for status LEDs
  Serial.println("Ready");
}

boolean comparetag(int aa[14], int bb[14])
{
  boolean ff = false;
  int fg = 0;
  for (int cc = 0; cc < 14; cc++)
  {
    if (aa[cc] == bb[cc])
    {
      fg++;
    }
  }
  if (fg == 14)
  {
    ff = true;
  }
  return ff;
}

void checkmytags() // compares each tag against the tag just read
{
  ok = 0; // this variable helps decision-making,
      // if it is 1 we have a match, zero is a read but no match,
      // -1 is no read attempt made
  if (comparetag(newtag, tag1) == true)
  {
    ok++;
  }

}

void readTags()
{
  ok = -1;

  if (RFID.available() > 0)
  {
    // read tag numbers
    delay(100); // needed to allow time for the data to come in from the serial buffer.

    for (int z = 0; z < 14; z++) // read the rest of the tag
    {
      data1 = RFID.read();
      Serial.println(data1);
      newtag[z] = data1;
    }
    RFID.flush(); // stops multiple reads


            // do the tags match up?
    checkmytags();
  }

  // now do something based on tag type
  if (ok > 0) // if we had a match
  {
    Serial.println("Accepted");
    digitalWrite(yes, HIGH);
    delay(1000);
    digitalWrite(yes, LOW);

    ok = -1;
    RFID.flush();
  }
  else if (ok == 0) // if we didn't have a match
  {
    Serial.println("Rejected");
    ok = -1;
  }
}

void loop()
{
  readTags();
}