MagTek RCS reader

gistfile1.py

#!/usr/bin/env python
 
# MagTek MSR100 Mini Swipe Card Reader
# Written By: Jeffrey Ness
#
# Some Thanks need to go out to
# http://www.micahcarrick.com/credit-card-reader-pyusb.html
# for helping me get on the right track
 
import usb.core
import usb.util
import atexit
import math
import time
import json
import LCDDriver
import httplib, urllib
from re import findall
from datetime import datetime
 
# MagTek Device MSR100 Mini Swipe
vendorid = 0x0801
productid = 0x0001
 
# Define our Character Map per Reference Manual
# http://www.magtek.com/documentation/public/99875206-17.01.pdf
 
chrMap = {
    4:  'a',
    5:  'b',
    6:  'c',
    7:  'd',
    8:  'e',
    9:  'f',
    10: 'g',
    11: 'h',
    12: 'i',
    13: 'j',
    14: 'k',
    15: 'l',
    16: 'm',
    17: 'n',
    18: 'o',
    19: 'p',
    20: 'q',
    21: 'r',
    22: 's',
    23: 't',
    24: 'u',
    25: 'v',
    26: 'w',
    27: 'x',
    28: 'y',
    29: 'z',
    30: '1',
    31: '2',
    32: '3',
    33: '4',
    34: '5',
    35: '6',
    36: '7',
    37: '8',
    38: '9',
    39: '0',
    40: 'KEY_ENTER',
    41: 'KEY_ESCAPE',
    42: 'KEY_BACKSPACE',
    43: 'KEY_TAB',
    44: ' ',
    45: '-',
    46: '=',
    47: '[',
    48: ']',
    49: '\\',
    51: ';',
    52: '\'',
    53: '`',
    54: ',',
    55: '.',
    56: '/',
    57: 'KEY_CAPSLOCK'
}
 
shiftchrMap = {
    4:  'A',
    5:  'B',
    6:  'C',
    7:  'D',
    8:  'E',
    9:  'F',
    10: 'G',
    11: 'H',
    12: 'I',
    13: 'J',
    14: 'K',
    15: 'L',
    16: 'M',
    17: 'N',
    18: 'O',
    19: 'P',
    20: 'Q',
    21: 'R',
    22: 'S',
    23: 'T',
    24: 'U',
    25: 'V',
    26: 'W',
    27: 'X',
    28: 'Y',
    29: 'Z',
    30: '!',
    31: '@',
    32: '#',
    33: '$',
    34: '%',
    35: '^',
    36: '&',
    37: '*',
    38: '(',
    39: ')',
    40: 'KEY_ENTER',
    41: 'KEY_ESCAPE',
    42: 'KEY_BACKSPACE',
    43: 'KEY_TAB',
    44: ' ',
    45: '_',
    46: '+',
    47: '{',
    48: '}',
    49: '|',
    51: ':',
    52: '"',
    53: '~',
    54: '<',
    55: '>',
    56: '?',
    57: 'KEY_CAPSLOCK'
}

# exit function
def goodbye():
    screen.ClearScreen()
    screen.WriteLine("Error! Contact", 1, 1)
    screen.WriteLine("Union Sysadmins", 2, 1)

# find the LCDScreen and initilize it
screen = LCDDriver.LCDDriver('/dev/ttyUSB0')
if screen is False:
    raise Exception('Could not find LCD Screen')
screen.ClearScreen()
screen.WriteLine("Starting up...",1,2)

# find our device by id
device = usb.core.find(idVendor=vendorid, idProduct=productid)
if device is None:
    raise Exception('Could not find USB Card Reader')
 
# remove device from kernel, this should stop
# reader from printing to screen and remove /dev/input
if device.is_kernel_driver_active(0):
    try:
        device.detach_kernel_driver(0)
    except usb.core.USBError as e:
        raise Exception("Could not detatch kernel driver: %s" % str(e))
 
atexit.register(goodbye)

# load our devices configuration
try:
    device.set_configuration()
    device.reset()
except usb.core.USBError as e:
    raise Exception("Could not set configuration: %s" % str(e))
 
# get device endpoint information
endpoint = device[0][(0,0)][0]
 
def cleardevice():
    '''Clear the devices memory'''

    while True:
        try:
            results = device.read(endpoint.bEndpointAddress, endpoint.wMaxPacketSize)
        except usb.core.USBError as e:
            if e.args[1] == 'Operation timed out' :
                break # timeout and swiped means we are done
 
def swipeme():
    '''Swipe function'''
    swiped = False
    display = False
    datalist = []
    cleardevice()
 
    screen.ClearScreen()
    screen.WriteLine("Please swipe",1,1)
    screen.WriteLine("your card now",2,1)
    # print 'Please swipe your card now:'
    while True:
        try:
            results = device.read(endpoint.bEndpointAddress, endpoint.wMaxPacketSize)
            datalist.append(results)
            swiped = True
            
 
        except usb.core.USBError as e:
            if e.args[1] == 'Operation timed out' and swiped:
                break # timeout and swiped means we are done

        if swiped is True and display is False:
            display = True
            screen.ClearScreen()
            screen.WriteLine("Processing...",1,1)
            screen.WriteLine("Please wait...",2,1)
 
    # create a list of 8 bit bytes and remove
    # empty bytes
    ndata = []
    for d in datalist:
        if d.tolist() != [0, 0, 0, 0, 0, 0, 0, 0]:
            ndata.append(d.tolist())
 
    # parse over our bytes and create string to final return
    sdata = ''
    for n in ndata:
        # handle non shifted letters
        if n[2] in chrMap and n[0] == 0:
            sdata += chrMap[n[2]]
        # handle shifted letters
        elif n[2] in shiftchrMap and n[0] == 2:
            sdata += shiftchrMap[n[2]]
 
    return sdata
 
# run first swipe
while 1:
    sdata = swipeme()
     
    # A format type of E is a error
    while sdata[1] == 'E':
        screen.ClearScreen()
        screen.WriteLine("Error!",1,1)
        time.sleep(2)
        # print 'Failed to read card..'
        sdata = swipeme()

    params = urllib.urlencode({'rawdata': sdata})
    headers = {"Content-type": "application/x-www-form-urlencoded",
                "Accept": "text/plain"}
    try:
        conn = httplib.HTTPConnection("files.kevin-oconnor.com")
        conn.request("POST", "/json.php", params, headers)
        response = conn.getresponse()
    except Exception as e:
        screen.ClearScreen()
        screen.WriteLine("Error!",1,1)
        time.sleep(2)
        continue

    try:
        data = json.loads(response.read())
    except Exception as e:
        screen.ClearScreen()
        screen.WriteLine("Error!",1,1)
        time.sleep(2)
        continue
    conn.close()

    print data

    screen.ClearScreen()
    screen.WriteLine("Hi " + data['user']['rcs'] + "!", 1, 1)
    punch_type = "In"
    if data['punch']['type'] == 1:
        punch_type = "Out"
    screen.WriteLine(punch_type + ' at ' + time.strftime("%H:%M:%S", datetime.fromtimestamp(data['punch']['date']).timetuple()), 2, 1)
    time.sleep(5)
     
    # print raw string always
    # print '\nRaw String: %s\n' % sdata