Python code with some comments and link:
#!/usr/bin/python
import sys
import usb.core
import usb.util
import json
import gspread
from oauth2client.client import SignedJwtAssertionCredentials
#It’ necessary discover what are VENDOR_ID and PRODUCT_ID of your card reader device with the command lsusb.
#Device are mainly identified using a pair of hexadecimal numbers, like 0acd:0520 .
VENDOR_ID=0x0acd
PRODUCT_ID=0x0520
DATA_SIZE=337
# keycode mapping
key_pages = [
'', '', '', '',
'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm',
'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
'1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '\n', '^]', '^H',
'^I', ' ', '-', '=', '[', ']', '\\', '>', ';', "'", '`', ',', '.',
'/', 'CapsLock', 'F1', 'F2', 'F3', 'F4', 'F5', 'F6', 'F7', 'F8', 'F9', 'F10', 'F11', 'F12',
'PS', 'SL', 'Pause', 'Ins', 'Home', 'PU', '^D', 'End', 'PD', '->', '<-', '-v', '-^', 'NL',
'KP/', 'KP*', 'KP-', 'KP+', 'KPE', 'KP1', 'KP2', 'KP3', 'KP4', 'KP5', 'KP6', 'KP7', 'KP8',
'KP9', 'KP0', '\\', 'App', 'Pow', 'KP=', 'F13', 'F14' ]
key_pages_shift = [
'', '', '', '',
'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M',
'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
'!', '@', '#', '$', '%', '^', '&', '*', '(', ')', '\n', '^]', '^H',
'^I', ' ', '_', '+', '{', '}', '|', '<', ':', '"', '~', '<', '>',
'?', 'CapsLock', 'F1', 'F2', 'F3', 'F4', 'F5', 'F6', 'F7', 'F8', 'F9', 'F10', 'F11', 'F12',
'PS', 'SL', 'Pause', 'Ins', 'Home', 'PU', '^D', 'End', 'PD', '->', '<-', '-v', '-^', 'NL',
'KP/', 'KP*', 'KP-', 'KP+', 'KPE', 'KP1', 'KP2', 'KP3', 'KP4', 'KP5', 'KP6', 'KP7', 'KP8',
'KP9', 'KP0', '|', 'App', 'Pow', 'KP=', 'F13', 'F14' ]
def map_character(c):
return key_pages[c]
def chunks(l, n):
""" Yield successive n-sized chunks from l.
for i in xrange(0, len(l), n):
yield l[i:i+n]
#below the class to write the spreadsheet
def addrow(info):
json_key = json.load(open('filedownloadedingoogle.json')) # http://gspread.readthedocs.org/en/latest/oauth2.html
scope = ['https://spreadsheets.google.com/feeds']
credentials = SignedJwtAssertionCredentials(json_key['client_email'], json_key['private_key'].encode(), scope)
gc = gspread.authorize(credentials)
# Open a worksheet from spreadsheet with one shot
wks = gc.open("worksheetname").sheet1
#wks.update_acell('B2', "it's down there somewhere, let me take another look.")
# Fetch cells in the column 1
values_list = wks.col_values(1)
count = 0
flag = 1
while flag == 1 : # This constructs an infinite loop
if (values_list[count]=='') : # loop on cell list until find out empty one
flag = 0
count = count + 1
wks.update_cell(count, 1, count) # in the line count and column 1 I put the index
wks.update_cell(count, 2, info) # in the line count and column 2 I put the info
class MagSwipe:
def __init__(self):
# find the MagSwipe reader
device = usb.core.find(idVendor=VENDOR_ID, idProduct=PRODUCT_ID)
if device is None:
sys.exit("Could not find MagTek USB HID Swipe Reader.")
# make sure the hiddev kernel driver is not active
if device.is_kernel_driver_active(0):
try:
device.detach_kernel_driver(0)
except usb.core.USBError as e:
sys.exit("Could not detatch kernel driver: %s" % str(e))
# set configuration
try:
device.set_configuration()
device.reset()
except usb.core.USBError as e:
sys.exit("Could not set configuration: %s" % str(e))
self._endpoint = device[0][(0,0)][0]
def wait_for_swipe(self):
# wait for swipe
data = []
swiped = False
print "Please swipe your card..."
while 1:
try:
data += self._endpoint.read(self._endpoint.wMaxPacketSize)
if not swiped:
print "Reading..."
swiped = True
except usb.core.USBError as e:
if e.args[0] == 110 and swiped:
if len(data) < DATA_SIZE:
print "Bad swipe, try again. (%d bytes)" % len(data)
print "Data: %s" % ''.join(map(chr, data))
data = []
swiped = False
continue
else:
break # we got it!
# convert text
map_keys = lambda c: key_pages_shift[c[1]] if c[0] is 2 else key_pages[c[1]]
data = "".join(map(map_keys, [(d[0], d[2]) for d in chunks(data, 8)]))
return data
if __name__ == "__main__":
info = MagSwipe().wait_for_swipe()
addrow(info)
