nfcpy を使用してLuLuCaの残高を表示する

luluca.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-
import struct
import nfc

service_code = 0x008b
 
def connected(tag):
  if isinstance(tag, nfc.tag.tt3.Type3Tag):
    try:
      sc = nfc.tag.tt3.ServiceCode(service_code >> 6, service_code & 0x3f)
      bc = nfc.tag.tt3.BlockCode(1, service = 0)
      data = tag.read_without_encryption([sc], [bc])
      d = struct.unpack('>cccHcccHcccccc', data)
      print "%d" % d[3]
    except Exception as e:
      print "error: %s" % e
  else:
    print "error: tag isn't Type3Tag"

if __name__ == "__main__":
  clf = nfc.ContactlessFrontend('usb')
  clf.connect(rdwr={'on-connect': connected})