wiegand.decoder Class Reference

Public Member Functions
def	__init__ (self, pi, gpio_0, gpio_1, callback, bit_timeout=5)
def	cancel (self)

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 (self, gpio, level, tick)

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

__init__()

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

_cb()

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.

cancel()

def wiegand.decoder.cancel

(

self

)

Cancel the Wiegand decoder.

Definition at line 106 of file wiegand.py.

Member Data Documentation

bit_timeout

wiegand.decoder.bit_timeout

Definition at line 52 of file wiegand.py.

bits

wiegand.decoder.bits

Definition at line 74 of file wiegand.py.

callback

wiegand.decoder.callback

Definition at line 50 of file wiegand.py.

cb_0

wiegand.decoder.cb_0

Definition at line 62 of file wiegand.py.

cb_1

wiegand.decoder.cb_1

Definition at line 63 of file wiegand.py.

code_timeout

wiegand.decoder.code_timeout

Definition at line 78 of file wiegand.py.

gpio_0

wiegand.decoder.gpio_0

Definition at line 47 of file wiegand.py.

gpio_1

wiegand.decoder.gpio_1

Definition at line 48 of file wiegand.py.

in_code

wiegand.decoder.in_code

Definition at line 54 of file wiegand.py.

num

wiegand.decoder.num

Definition at line 75 of file wiegand.py.

pi

wiegand.decoder.pi

Definition at line 46 of file wiegand.py.

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The documentation for this class was generated from the following file:

• wiegand.py