MK179 - Is it possible to identify which card has been used

Kits Microcontroller Programmer - Experimenting Project
1

Hi,

I’ve just purchased the MK179 proximity card reader (still waiting for it to be delivered). What I’d like to be able to do is identify which card was used to activate the relay & I’m wondering if there is some way to get this information from the VMK179 chip ?

I’ve downloaded all of the documents available on your site for the module & have read through all of the posts in this forum also so I know you don’t give out your source (I don’t blame you) & you don’t do custom code either (that’s fine too)…

I’m guessing that each card holds a unique serial number and that in ‘high security’ mode the VMK179 stores this serial numbers from ‘learned’ cards. When a card is presented it then compares the serial number from the card just read with the list of learned cards so it can decide whether to activate the relay. Given that the cards serial number has to be passed to the VMK179 chip, if I knew which pin(s) on the VMK179 are used for input & the format of the data passed then I could use this with the fact that the relay has been activated to record which cards where read & if the card was on the learned list - Can you provide this info or is there an easier way ?

thanks,

John

2

All the information handling is performed inside the µcontroller, the information is not output to any pin.
If you need the data string that comes from the card, you will need to develop custom firmware to reprogram the controller.

3

Hi,

Thanks for your response.

While I understand that most of the information handling is performed within the VMK179 & that the data string is not output to any pin, however for the data string from the card to be processed by the µcontroller it must have been input to it - Is it possible to get information about which pin(s) are used to input the cards data string to the µcontroller & the format of the input stream ?

thanks,

john

4

Diagram has been mailed to your address.
Kit uses standard EM4100 protocol.

5

Thanks for the information,

john

6

Please could you email me circuit diagram of the MK179 as you have done for John.
I also want to identify individual cards.
Thank you
JVTHORSLEY