search

gutierrezps / gwiot7941e

A simple library to interface with Gwiot 7941E RFID reader
GNU General Public License v3.0
7 stars 5 forks source link

Does the 7941E read HID Prox Card II type cards? #2

Closed exabrial closed 4 years ago

exabrial commented 4 years ago

The documentation claims it has a bit for HID, but I can't seem to find anyone reading prox cards with this device. Thank you!

gutierrezps commented 4 years ago

Unfortunately I can't provide an answer since I don't have this type of card to test. Can you link this documentation you've mentioned?

exabrial commented 4 years ago

I'm looking around for some technical documentation, but here's the first datasheet: https://www.hidglobal.com/system/files/doc_eol_expired_files/prox-proxcard-ii-card-ds-en.pdf

They are outdated and insecure, as the transmit the card's number in clear text and do not do any authentication (in either direction). Nevertheless, these types of cards are pretty common in the USA.

exabrial commented 4 years ago

https://www.hidglobal.com/sites/default/files/hid-understanding_card_data_formats-wp-en.pdf

gutierrezps commented 4 years ago

The documentation claims it has a bit for HID

I thought it was some documentation about the 7941E.

According to this comment on Quora, HID Prox II is 125 kHz, so I think it can be read by the 7941E.

If you could test it and report, it would be great.

exabrial commented 4 years ago

sweet. I have a 7941E coming from china

gutierrezps commented 4 years ago

@exabrial did it work?

exabrial commented 4 years ago

Because of 'rona, it took months to arrive, but it did a few weeks ago. Unfortunately it did not. Still looking for a solution that can read proxcards :/ Let me know if you ever find something

gutierrezps commented 4 years ago

If it's not 125kHz then it might be 13.56MHz, which can be read with RC522 modules. Those are more popular than 125kHz modules, so you can give it a try.

exabrial commented 4 years ago

It's definitely 125khz, says on the back of the proxcard. The data encoding format just isn't supported :(