3

I would like to build a Wiegand device from Raspberry Pi to output 37 bit Wiegand format data to Wiegand control unit receiver.

I don't want to read the Wiegand protocol on Raspberry Pi like from RFID card readers, but instead, I would like to act as something like this.

How can I do it? Is there any HW Wiegand interface for Raspberry Pi and library through which I can send Wiegand data?

I need that Raspberry Pi will output Wiegand 37 bit format data.

Anyone with experience with that?

4

Wiegand is quite straightforward. It is not a particularly onerous interface.

For an example of transmitting Wiegand codes see

http://abyz.me.uk/rpi/pigpio/examples.html#pdif2_tx_WD

/*

This programs transmits Wiegand codes on a pair of GPIO.  It is
intended to be used to test Wiegand decoding software.

REQUIRES

Nothing

TO BUILD

gcc -Wall -pthread -o tx_WD tx_WD.c -lpigpiod_if2

TO RUN

sudo pigpiod # If the daemon is not already running

then

./tx_WD -gGPIO -wGPIO [options] {code}+

./tx_WD -? for options

E.g.

./tx_WD -g5 -w6 -s37 12345 67890 123 899999

NOTE

This code sets the used GPIO to be outputs.  If you intend to feed the
signals into a program under test it is probably best to use different
GPIO in the two programs and connect them by wires.

*/

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.