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Hello,
I have a problem. I have a device, it send for me some data. For example:
02h B3h 46h B0h B0h 31h B5h 32h B0h 32h B3h 31h 32h B3h B3h B0h 34h 32h B3h 20h 83h D5h. The last byte(D5) is the CS ,but I can't decode that. Please help me.
Thanks in advance!
3 replies to this topic
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#2
Posted 02 March 2009 - 07:16 AM
WingedPanther
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A spammer's worst nightmare
What do you mean by "decode that"? The checksum is used to verify the preceding data, based on a predefined formula and expected result. Do you have the checksum formula?
#3
Posted 02 March 2009 - 09:12 AM
peti1000
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Newbie
No. I don't have the checksum formula.
#4
Posted 02 March 2009 - 07:02 PM
WingedPanther
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- Moderators
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- 16,831 posts
A spammer's worst nightmare
The checksum formula could be most anything. Parity bits are the simplest. The checksums for Visa and Mastercard credit cards are quite a bit more complex. Unless you know the checksum formula, you will have a lot of reverse-engineering to do.
