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May 16, 2020 07:47
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Python 3 script to demonstrate writing custom data to Ultimaker filament NFC tag
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| # -*- coding: utf-8 -*- | |
| # https://github.com/BrianHVB/intro-to-smartcard-development#heading--python-example-1 | |
| # | |
| # required packages: pyscard | |
| # | |
| from smartcard.Exceptions import NoCardException | |
| from smartcard.System import * | |
| from smartcard import util | |
| from ums5 import MyFilamentSpool, decode | |
| import uuid | |
| from binascii import hexlify | |
| class MustBeEvenException(Exception): | |
| pass | |
| def cmd_read_page(start, count=4): | |
| return [0xff, 0xb0, (start >> 8) & 0xff, start & 0xff, count & 0xff] | |
| def cmd_write_page(start, data): | |
| if isinstance(data, bytes): | |
| data = list(data) | |
| count = len(data) | |
| return [0xff, 0xd6, (start >> 8) & 0xff, start & 0xff, count & 0xff] + data | |
| def main(): | |
| # get and print a list of readers attached to the system | |
| sc_readers = readers() | |
| print(sc_readers) | |
| # create a connection to the first reader | |
| first_reader = sc_readers[0] | |
| connection = first_reader.createConnection() | |
| # get ready for a command | |
| get_uid = util.toBytes("FF CA 00 00 00") | |
| try: | |
| # send the command and capture the response data and status | |
| connection.connect() | |
| uid_data, sw1, sw2 = connection.transmit(get_uid) | |
| # print the response | |
| uid = util.toHexString(uid_data) | |
| status = util.toHexString([sw1, sw2]) | |
| serial = hexlify(bytes(uid_data)).decode('latin').upper() | |
| print("UID = {}\tstatus = {}\tdata={}".format(uid, status, uid_data)) | |
| carbon = MyFilamentSpool(uuid.UUID("4debf055-6eed-4795-b4c4-4643fba8ea53"), 800000, serial) | |
| decode(carbon.data()) | |
| tag_data = carbon.data() | |
| for i in range(0, len(tag_data), 4): | |
| page = i//4 + 4 | |
| data = list(tag_data[i:i+4]) # no padding required, length of encoded data is already a multiple of 4 | |
| print("[{:02x}] = {}".format(page, util.toHexString(data))) | |
| # print("[{:02x}] = {}\tstatus = {}".format(page, util.toHexString(data), util.toHexString([sw1, sw2]))) | |
| recv, sw1, sw2 = connection.transmit(cmd_write_page(page, data)) | |
| print("[{:02x}] = {}\trecv = {}\tstatus = {}".format(page, util.toHexString(data), | |
| util.toHexString(recv), | |
| util.toHexString([sw1, sw2]))) | |
| decode(bytes(tag_data)) | |
| except NoCardException: | |
| print("ERROR: Card not present") | |
| if __name__ == '__main__': | |
| main() |
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