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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?
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.
*/
