How to calculate checksum

RFID reader, Reader/Writer, Tag.....

How to calculate checksum

Postby musofa81 » Mon Feb 04, 2013 8:26 pm

Hi,
I'm working on RFID project where I need to determine the checksum value. Below is the example of Hex string value where I believed the last two bytes are the checksum values. How to get the value of 88 byte for item 1 and how to get the checksum value for item 2. I'm really appreciate if anyone could help me. Thank you.

1. 00 03 85 01 FF 88, Checksum = 88
2. 00 09 85 05 AA FF FF FF FF FF FF ??
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Re: How to calculate checksum

Postby Idris » Tue Feb 05, 2013 3:23 pm

Could I know what kind of RFID module you used?

I have share RFID read and write here viewtopic.php?f=30&t=11739
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Re: How to calculate checksum

Postby musofa81 » Tue Feb 05, 2013 9:09 pm

Idris WROTE:Could I know what kind of RFID module you used?

I have share RFID read and write here viewtopic.php?f=30&t=11739


I use as the link below;

https://www.sparkfun.com/products/10126
https://www.sparkfun.com/products/10406
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