CrowPi Lesson 日本語リファレンス（LESSON11)実践

 lesson11のプログラム。

!/usr/bin/env python

# -*- coding: utf8 -*-

# Copyright 2014,2018 Mario Gomez <mario.gomez@teubi.co>

import RPi.GPIO as GPIO

import MFRC522

import signal

continue_reading = True

# Incase user wants to terminate, this function is exactly for that reason.

def end_read(signal,frame):

    global continue_reading

    print("Ctrl+C captured, ending read.")

    continue_reading = False

    GPIO.cleanup()

signal.signal(signal.SIGINT, end_read)

# create the reader object

MIFAREReader = MFRC522.MFRC522()

# Welcome greeting

print("Welcome to MFRC522 RFID Read example")

print("Press CTRL+C anytime to quit.")

# The function will continue running to detect untill user said otherwise

while continue_reading:

    # detect touch of the card, get status and tag type

    (status,TagType) = MIFAREReader.MFRC522_Request(MIFAREReader.PICC_REQIDL)

    # check if card detected or not

    if status == MIFAREReader.MI_OK:

        print("Card detected")

    # Get the RFID card uid and status

    (status,uid) = MIFAREReader.MFRC522_Anticoll()

    # If status is alright, continue to the next stage

    if status == MIFAREReader.MI_OK:

        # Print UID

        print("Card read UID: %s,%s,%s,%s" % (uid[0], uid[1], uid[2], uid[3]))

        # standard key for rfid tags

        key = [0xFF,0xFF,0xFF,0xFF,0xFF,0xFF]

        # Select the scanned tag

        MIFAREReader.MFRC522_SelectTag(uid)

        # authenticate

        status = MIFAREReader.MFRC522_Auth(MIFAREReader.PICC_AUTHENT1A, 8, key, uid)

        # check if authenticated successfully, read the data

        if status == MIFAREReader.MI_OK:

            MIFAREReader.MFRC522_Read(8)

            MIFAREReader.MFRC522_StopCrypto1()

        else:

            print("Authentication error")