Comparing RFID Tags

Forum 2005-2010 (read only) Software Syntax & Programs
1

I need to compare two different char arrays, however, I've run into a wall. The first array is the RFID tag being swiped and the other is a preset one 0F03029400.

I hope someone can help point me in the right direction and help me realize what im doing wrong. Most of the code is from an arduino tutorial:

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

int  val = 0; 
int ledRed = 3;   
char code[10];   // this value is the ID being swiped
int bytesread = 0;
//char admincard[] = "0F03029400"; 


#define rxPin 8
#define txPin 9
// RFID reader SOUT pin connected to Serial RX pin at 2400bps to pin8

void setup()
{ 
  Serial.begin(2400);  // Hardware serial for Monitor 2400bps

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


void loop()
{ 
  SoftwareSerial RFID = SoftwareSerial(rxPin,txPin); 
  RFID.begin(2400);

  if((val = RFID.read()) == 10)
  {   // check for header 
    bytesread = 0; 
    while(bytesread<10)
    {  // read 10 digit code 
      val = RFID.read(); 
      if((val == 10)||(val == 13))
      {  // if header or stop bytes before the 10 digit reading 
        break;                       // stop reading 
      } 
      code[bytesread] = val;         // add the digit       
      bytesread++;                   // ready to read next digit  
    } 



    //This is where I am having trouble.



    if(bytesread == 10)

    {  // if 10 digit read is complete

     if (code == "0F03029400"){ //"0F03029400"
         Serial.println(" CORRECT TAG READ ");
         digitalWrite(ledRed, HIGH);
      } 

       Serial.print("TAG code is: ");   // possibly a good TAG 
       Serial.println(code);            // print the TAG code 
    }
    bytesread = 0; 
    delay(500);                       // wait for a second
  } 
  delay(1000);
  digitalWrite(ledRed, LOW);
}
2

You have an array of bytes from the card scanned, in code.
You have an array of bytes from another card, in admincard (currently commented out).

boolean matched = true;
for(int i=0; i<10; i++)
{
  if(code[i] != admincode[i])
  {
     matched = false;
     break;
  }
}

if(matched)
{
   // The cards match
}
else
{
   // Well, they don't
}
3

Wow that is brilliant. I never thought to loop through each byte of the array. Thanks so much

EDIT: And it works, 100%