Does anybody have any information on the Wiegand Protocol used in security systems? I have noticed that there are a few different implementations of the protocol but I can't find any information on the net.
Is there a specification available, and where can I get hold of it?
Can somebody please help?
It is a protocol that is used in "Access Control Systems" mostly the wireless ones, the Door reader reads induces electric field throug its Antenna when the card is in the coverage field, it returns back a certain number that is the card number.
Card Numbers can be formatted in many formats like the Wiegand and 35 system
The wiegand-26- as an example splits the 26 bits into two groups of 13 bits
the first group is used as a group identifier that all users within a corporate share, the other is user specific
Hi,
I'm trying to interface a wiegand reader with a microchip micocontroller,I was reading the posts but I still can't get it,in datao I get the '0' and data1 the '1',has anyone a timimg diagram to understand how to read it??
thanks a lot
Javier
You no need to see the timing digrame, you can used the interrup base, if u using the PIC16f84 you can used the portb 4:7 as input and setting as interrup base port.
In my company we use several wiegand interfaced devices. We normaly just convert the protocol to RS-485 / or USB. You can easily find these converters out there. Check, for example, (https://www.etconcept.com/Wiegand.htm).
iam using weigand protocol for accessing Card readers,can anyone help what is the maximum lenght shuold i connect my controller away from reader.i have connected about 20m distance between controller and reader,and used switching supply for the supply.iam getting a wrong data when i show a configured data.plz help me guys.