Forum › MIFARE general topics and applications › Different numbers being read on different types of readers › Reply To: Different numbers being read on different types of readers
"After reading this post I noticed the pattern.
1st and 4th bytes were switched
2nd and 3rd bytes were switched
Old readers : 4C DD A1 5F
Identive readers: 5F A1 DD 4C"
If you notice, this is not switched but reversed. There is a method called MSB (Most Sensitive Bit) and LSB (Least Sensitive Bit). This tells the reader how to send the information in what order. 32bit start from front or back. If you can display the full 32bits of data, you will notice where this portion is coming from.
1st and 4th bytes were switched
2nd and 3rd bytes were switched
Old readers : 4C DD A1 5F
Identive readers: 5F A1 DD 4C"
If you notice, this is not switched but reversed. There is a method called MSB (Most Sensitive Bit) and LSB (Least Sensitive Bit). This tells the reader how to send the information in what order. 32bit start from front or back. If you can display the full 32bits of data, you will notice where this portion is coming from.
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