RFID tags 125 kHz

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brice.castex
Pre-kindergarten
Pre-kindergarten
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Joined: Fri May 17, 2019 3:50 pm

RFID tags 125 kHz

Post by brice.castex » Fri May 17, 2019 3:54 pm

Hello guys, i have an issue.

What is the protocol used for these tags ?

Thanks in advance for your response and have a nice day ! ^_^
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bill.yu
Junior-7
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Re: RFID tags 125 kHz

Post by bill.yu » Mon May 20, 2019 10:24 am

Hi there,

it is 125Khz, EM4100 standard. thanks.

brice.castex
Pre-kindergarten
Pre-kindergarten
Posts: 2
Joined: Fri May 17, 2019 3:50 pm

Re: RFID tags 125 kHz

Post by brice.castex » Mon May 20, 2019 10:14 pm

Thanks Bill, but is there in GitHub a little piece of code that should be able to decode the data frame and collect the Card Number in the Serie Monitor ?

bill.yu
Junior-7
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Posts: 735
Joined: Mon Apr 02, 2018 11:05 am

Re: RFID tags 125 kHz

Post by bill.yu » Tue May 21, 2019 10:43 am

Hi there,

here is the format.For example as below:

Output: 0700952F229F -------------- -Hexadecimal: Start Bit(07) + Card Number(00952F22)+ Checksum(9F)

then you can covert the card number from hex to dec and add start bit as below. thanks.

Card Number ID: 0009776930 ------- Decimal: Start Bit(00 or other) + Card Number(09776930)

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