Parllax RFID reader with Leonardo HEX!

Other Hardware Sensors
1

So I can view the string but can not use the string with any operators like match string and use it:

while(rfid.available()>0)
{
c=rfid.read();
msg += c;
Serial.println(msg);
Serial.println(msg.length());
}
if(msg.length()>=10) // this number is low to get the correct string size to print... any bigger the string has extra bits
{
digitalWrite (RedLED,LOW); //Test for now to see if string came in, always works!
//rfid.println(msg);
if(msg == "BDECF6F696569696965695E5EB00" || msg == "BDECF6F6965616B6F5DD95E5EB00") // either card does not work! but if i make it <= that works... but not what I need!
{
rfid.println(msg);
//digitalWrite (GreenLED,LOW);
msg="";
}
else {rfid.println(msg);msg="";} // the will print out the serial port the in coming string and I will receive: [BD][EC][F6][F6][96][56][96][96][96][56][95][E5][EB][00] and looks correct 90% of the time???
};
I have also tried the longer code with memcmp operator and that would not even print back what was stored as a byte or print out "code" as a long enuff string to match the card number...

Help!

2

I suspect that you are including some framing character in your string. The Parallax reader I have sends ten decimal digits followed by CR and LF (0x13 and 0x10).

// PARALLAX RFID VCC     to Arduino 5V
// PARALLAX RFID /ENABLE to Arduino D2
// PARALLAX RFID SOUT    to Arduino D3
// PARALLAX RFID GND     to Arduino Gnd

// Modified by Worapoht K.
#include <SoftwareSerial.h>

#define enablePin 2
#define rxPin 3
#define txPin 4

SoftwareSerial RFID = SoftwareSerial(rxPin, txPin); 

#define START_CHAR 10
#define END_CHAR 13

void setup()
{ 
  Serial.begin(9600);  // Hardware serial for Monitor 2400bps
  RFID.begin(2400);    // RFID reader SOUT at 2400bps

  pinMode(enablePin,OUTPUT);       // Set digital pin 2 as OUTPUT to connect it to the RFID /ENABLE pin 
  digitalWrite(enablePin, LOW);    // Activate the RFID reader 
}


void loop()
{
  int bytesread, val;
  String code = "";

  digitalWrite(enablePin, LOW);    // Activate the RFID reader

  // Wait for header byte
  while(RFID.read() != START_CHAR) 
    /* DO NOTHING */    ;

  bytesread = 0;
  while ((val = RFID.read()) != END_CHAR)
  {
    if (val == START_CHAR)
      break; // Bad frame
    bytesread++;
    if (bytesread > 10)
      break;  // Too many characters
    code += val;     // append the character  
  }

  digitalWrite(enablePin, HIGH);    // Deactivate the RFID reader 

  if (bytesread == 10)  // Valid read.  10 characters + END_CHAR
  {  // if 10 digit read is complete 
    if (code == "48524953696548555648")
      Serial.println("That's the round tag.");
    else
      if (code == "48704851485249505067")
        Serial.println("That's the rectangular tag.");
      else
      {
        Serial.print("Unrecognized code: ");   // possibly a good TAG 
        Serial.println(code);            // print the TAG code 
      }
  }
  delay(1000);                       // wait for a second
}