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serial-portrfid

RFID reader with RS232 gives wrong output

Today i got this reader from local shop. Earlier i worked with Wiegand type readers with no problem. So anyway, when i try to read EM type card with 0009177233 ID (written on card) i should get at least 9177233 with start and stop chars expected. But instead i get 50008C0891

ASCII 50008C0891

HEX 02 35 30 30 30 38 43 30 38 39 31 0D 0A 03

BIN 00000010 00110101 00110000 00110000 00110000 00111000 01000011 00110000 00111000 00111001 00110001 00001101 00001010 00000011

I use USB-RS232 converter and RealTerm software.

  • Does anyone has any ideas why?
  • Are there 2 ID's?
Solution

  • The decimal 9177233 equals HEX 8C0891, so the software gives you the serialnumber in hexadecimal notation. I think, the full number 50008C0891 is the 5 Bytes (40bit) from the UID of the EM-type chip.

    Regards