RFID reading on raspberry pi

read-rfid-on-rpi.py

import sys

hid = { 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', 44: ' ', 45: '-', 46: '=', 47: '[', 48: ']', 49: '\\', 51: ';' , 52: '\'', 53: '~', 54: ',', 55: '.', 56: '/'  }
hid2 = { 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: ')', 44: ' ', 45: '_', 46: '+', 47: '{', 48: '}', 49: '|', 51: ':' , 52: '"', 53: '~', 54: '<', 55: '>', 56: '?'  }

fp = open('/dev/hidraw0', 'rb')
ss = ""
shift = False
done = False
while not done:
   ## Get the character from the HID
   buffer = fp.read(8)
   for c in buffer:
      if ord(c) > 0:
         ##  40 is carriage return which signifies
         ##  we are done looking for characters
         if int(ord(c)) == 40:
            done = True
            break;
         ##  If we are shifted then we have to
         ##  use the hid2 characters.
         if shift:
            ## If it is a '2' then it is the shift key
            if int(ord(c)) == 2 :
               shift = True
            ## if not a 2 then lookup the mapping
            else:
               ss += hid2[ int(ord(c)) ]
               shift = False
         ##  If we are not shifted then use
         ##  the hid characters
         else:
            ## If it is a '2' then it is the shift key
            if int(ord(c)) == 2 :
               shift = True
            ## if not a 2 then lookup the mapping
            else:
               ss += hid[ int(ord(c)) ]
print ss