Jason wrote
>Say if I send the group 1234 and actions happens.
>But if I send the group 1479 the actions does not happen.

>Can anyone give me any suggestions on how I might check this string and
>determine if it is the correct one.

Try sending the data as packed BCD this would only take two bytes, then
subtracting the check data from it if the answer is 0 then it matches. you
dont have to send as packed bcd but it will make the code twice as long

example of comparison of two values:-

     MOVFW    1ST_BYTE
     SLBLW     .12                    ;YOUR FIRST TWO DIGITS
     BTFSS      STATUS,Z         ; CHECK THE FIRST BYTE IS THE SAME Z=1
     GOTO       NO_MATCH       ; QUICK EXIT
     MOVFW    2ND_BYTE       ; GET SECOND BYTE
     SUBLW     .34                   ;YOUR SECOND PAIR OF DIGITS
     BTFSS      STATUS,Z         ; CHECK SAME Z=1
     GOTO       NO_MATCH       ; QUICK EXIT
     code to opperate item.....
NO_MATCH                            ; VALUES NOT THE SAME DO SOMTHING ELSE
      goto begining and start again.....