Found wrong LRC

Question

I want to calculate LRC (in JAVA) for the following message:

String TLV1="003D6000010000544553543531333030303234FF8B6028DF0225DF82040C544553543531333030303234DF820803000160DF820903170222DF820A03172011D5";

My LRC should be "D5" = 213 But my code calculate 232 :( I do not know where I'm doing wrong.

public short calculateLRC()                         
{

    short LRC = 0;

    for (int i =2 ; i < TLV1.length()-2; i=i+2)
    {
    String a1=TLV1.substring(i,i+2);    
    String a2="0x"+a1;
    Integer a3 = Integer.decode(a2);
    int a4[] = new int [TLV1.length()];
    a4[i/2]=a3;
    LRC ^= a4[i/2];                             
    }                                           
    return  LRC;

}

Are you speaking of the [Longitudinal Redundancy Check](https://en.wikipedia.org/wiki/Longitudinal_redundancy_check)? What's the problem you're encountering more specifically? The more background you can provide, the easier it is for folks to answer. — Horia Coman, Feb 27 '17 at 07:29
Duplicate : http://stackoverflow.com/questions/6221886/calculating-lrc-in-java — Radi, Feb 27 '17 at 07:30
Possible duplicate of [Calculating LRC in java](http://stackoverflow.com/questions/6221886/calculating-lrc-in-java) — Radi, Feb 27 '17 at 07:30
This "question" (in fact, ther is no question) lacks many things: a detailed problem description, code that has been tried, research (there are some obvious duplicates), and others. But yet someone upvoted? — Seelenvirtuose, Feb 27 '17 at 07:38

score 1 · Accepted Answer · answered Feb 27 '17 at 08:09

1

change your code

LRC ^= TLV[i]; //Says array required but string found

to

LRC ^= (byte)TLV.charAt(i);

answered Feb 27 '17 at 08:09

Mohammad Faisal

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Found wrong LRC

1 Answers1