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README.md

Wiegand 26 Bit Reader

Module for reading Wiegand 26 Bit Output on a Raspberry Pi 3

Source

Clone the repository using:

git clone "https://github.com/bennington-hardware-hacking-2019/wiegand26.git"

Hardware Setup

  1. Power the reader.
  2. Connect the data0 and data0 to GPIO pins on the Pi.
  3. Change the values of data0 and data1 in config.json to the physical pins.
    • Note: If you wish to change the facility number, this can also be found in config.json under facility.

Basic Usage

To read the value of a single card, just run ./wiegand_26_bit.py and hold the target card up to the reader.

Functionality and API

All readings are processed by the Wiegand26 object, so initialization of the Wiegand26 allows interface with Wiegand Input.

Wiegand26 Functions:

  • setup - Configures the Pi to allow input to be read. This function should always be run before anything else (other than __init__)
  • read - Returns the Card Number as an integer. Also, it can raise the following exceptions.
    • FacilityError - Exception for when the Facility does not match the preconfigured one.
    • ReadError - Exception when the card is read incorrectly. This is caught by the parity bits.