Public Member Functions
def	__init__
def	cancel
Public Attributes
	bit_timeout
	bits
	callback
	cb_0
	cb_1
	code_timeout
	gpio_0
	gpio_1
	in_code
	num
	pi
Private Member Functions
def	_cb

Detailed Description

A class to read Wiegand codes of an arbitrary length.

The code length and value are returned.

EXAMPLE

#!/usr/bin/env python

import time

import pigpio

import wiegand

def callback(bits, code):
   print("bits={} code={}".format(bits, code))

pi = pigpio.pi()

w = wiegand.decoder(pi, 14, 15, callback)

time.sleep(300)

w.cancel()

pi.stop()

Definition at line 5 of file wiegand.py.

Constructor & Destructor Documentation

def wiegand.decoder.__init__	(	self,
		pi,
		gpio_0,
		gpio_1,
		callback,
		bit_timeout = `5`
	)

Instantiate with the pi, gpio for 0 (green wire), the gpio for 1
(white wire), the callback function, and the bit timeout in
milliseconds which indicates the end of a code.

The callback is passed the code length in bits and the value.

Definition at line 36 of file wiegand.py.

Member Function Documentation

def wiegand.decoder._cb	(	self,
		gpio,
		level,
		tick
	)	`[private]`

Accumulate bits until both gpios 0 and 1 timeout.

Definition at line 65 of file wiegand.py.

def wiegand.decoder.cancel ( self )

Cancel the Wiegand decoder.

Definition at line 106 of file wiegand.py.