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| -rw-r--r-- | .gitignore | 4 | ||||
| -rw-r--r-- | MANIFEST.in | 1 | ||||
| -rw-r--r-- | README | 15 | ||||
| -rw-r--r-- | glucometer.py | 42 | ||||
| -rw-r--r-- | glucometerutils/__init__.py | 0 | ||||
| -rw-r--r-- | glucometerutils/common.py | 48 | ||||
| -rw-r--r-- | glucometerutils/drivers/__init__.py | 0 | ||||
| -rw-r--r-- | glucometerutils/drivers/otultra2.py | 257 | ||||
| -rw-r--r-- | glucometerutils/exceptions.py | 29 | ||||
| -rw-r--r-- | gpl-3.txt | 674 | ||||
| -rw-r--r-- | setup.py | 24 | ||||
| -rw-r--r-- | test/test_otultra2.py | 48 |
12 files changed, 1142 insertions, 0 deletions
diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..79ddd92 --- /dev/null +++ b/.gitignore @@ -0,0 +1,4 @@ +*.pyc +/MANIFEST +/dist/ +__pycache__/ diff --git a/MANIFEST.in b/MANIFEST.in new file mode 100644 index 0000000..be82640 --- /dev/null +++ b/MANIFEST.in @@ -0,0 +1 @@ +include gpl-3.txt @@ -0,0 +1,15 @@ +Glucometer Utilities +==================== + +This utility I created for personal needs, as my glucometer's software +can only print the software (to XPS) without a file export option. + +While right now only supports my glucometer (LifeScan OneTouch Ultra +2), I've tried designing it so that it can be extended and used for +other models as well. + +License +------- + +Due to one of the dependencies being licensed under GPL v3, the +utility is also released under GPLv3 or later. diff --git a/glucometer.py b/glucometer.py new file mode 100644 index 0000000..69748b4 --- /dev/null +++ b/glucometer.py @@ -0,0 +1,42 @@ +#!/usr/bin/env python +"""Utility to manage glucometers' data.""" + +__author__ = 'Diego Elio Pettenò' +__email__ = 'flameeyes@flameeyes.eu' +__copyright__ = 'Copyright © 2013, Diego Elio Pettenò' +__license__ = 'GPL v3 or later' + +import argparse +import importlib +import sys + +from glucometerutils import constants +from glucometerutils.drivers import otultra2 + +def main(argv=sys.argv): + parser = argparse.ArgumentParser() + subparsers = parser.add_subparsers() + + parser.add_argument( + '--driver', action='store', required=True, + help='Select the driver to use for connecting to the glucometer.') + parser.add_argument( + '--device', action='store', required=True, + help='Select the path to the glucometer device.') + + parser_dump = subparsers.add_parser( + 'dump', help='Dump the readings stored in the device.') + + parser_date = subparsers.add_parser( + 'datetime', help='Reads or sets the date and time of the glucometer.') + parser_date.add_argument( + '--set', action='store_true', + help='Set the date rather than just reading it from the device.') + + args = parser.parse_args() + + driver = importlib.import_module('glucometerutils.drivers.' + args.driver) + device = driver.Device(args.device) + +if __name__ == "__main__": + main() diff --git a/glucometerutils/__init__.py b/glucometerutils/__init__.py new file mode 100644 index 0000000..e69de29 --- /dev/null +++ b/glucometerutils/__init__.py diff --git a/glucometerutils/common.py b/glucometerutils/common.py new file mode 100644 index 0000000..e9e3cda --- /dev/null +++ b/glucometerutils/common.py @@ -0,0 +1,48 @@ +"""Common routines for data in glucometers.""" + +__author__ = 'Diego Elio Pettenò' +__email__ = 'flameeyes@flameeyes.eu' +__copyright__ = 'Copyright © 2013, Diego Elio Pettenò' +__license__ = 'GPL v3 or later' + +# Constants for units +UNIT_MGDL = 'mg/dL' +UNIT_MMOLL = 'mmol/L' + +VALID_UNITS = [UNIT_MGDL, UNIT_MMOLL] + +# Constants for date format +DATETIME_12HR = '12 hours' +DATETIME_24HR = '24 hours' + +from glucometerutils import exceptions + + +def ConvertGlucoseUnit(value, from_unit, to_unit=None): + """Convert the given value of glucose level between units. + + Args: + value: The value of glucose in the current unit + from_unit: The unit value is currently expressed in + to_unit: The unit to conver the value to: the other if empty. + + Returns: + The converted representation of the blood glucose level. + + Raises: + exceptions.InvalidGlucoseUnit: If the parameters are incorrect. + """ + if from_unit not in VALID_UNITS: + raise exceptions.InvalidGlucoseUnit(from_unit) + + if from_unit == to_unit: + return value + + if to_unit is not None: + if to_unit not in VALID_UNITS: + raise exceptions.InvalidGlucoseUnit(to_unit) + + if from_unit is UNIT_MGDL: + return round(value / 18.0, 2) + else: + return round(value * 18.0, 0) diff --git a/glucometerutils/drivers/__init__.py b/glucometerutils/drivers/__init__.py new file mode 100644 index 0000000..e69de29 --- /dev/null +++ b/glucometerutils/drivers/__init__.py diff --git a/glucometerutils/drivers/otultra2.py b/glucometerutils/drivers/otultra2.py new file mode 100644 index 0000000..43be6d4 --- /dev/null +++ b/glucometerutils/drivers/otultra2.py @@ -0,0 +1,257 @@ +"""Driver for LifeScan OneTouch Ultra 2 devices""" + +__author__ = 'Diego Elio Pettenò' +__email__ = 'flameeyes@flameeyes.eu' +__copyright__ = 'Copyright © 2013, Diego Elio Pettenò' +__license__ = 'GPL v3 or later' + +import datetime +import re + +import serial + +from glucometerutils import common +from glucometerutils import exceptions + + +class MissingChecksum(exceptions.InvalidResponse): + """The response misses the expected 4-digits checksum.""" + def __init__(self, response): + self.response = response + + def __str__(self): + return 'Response is missing the OT2 checksum: %s' % self.response + + +class InvalidSerialNumber(exceptions.Error): + """The serial number is not ending with Y as expected.""" + + +class Device(object): + def __init__(self, device): + self.serial_ = serial.Serial( + port=device, baudrate=9600, bytesize=serial.EIGHTBITS, + parity=serial.PARITY_NONE, stopbits=serial.STOPBITS_ONE, + timeout=1, xonxoff=False, rtscts=False, dsrdtr=False, writeTimeout=None) + + def _SendCommand(self, cmd): + """Send command interface. + + Args: + cmd: command and parameters to send (without newline) + + This function exists to wrap the need to send the 0x11 0x0d prefix with + each command that wakes this model up. + """ + cmdstring = bytes('\x11\r' + cmd + '\r', 'ascii') + self.serial_.write(cmdstring); + self.serial_.flush() + + _RESPONSE_MATCH = re.compile(r'^(.+) ([0-9A-F]{4})\r$') + + def _ValidateAndStripChecksum(self, line): + """Verify the CRC16 checksum and remove it from the line. + + Args: + line: the line to check the CRC16 of. + + Returns: + A copy of the line with the CRC16 stripped out. + """ + match = self._RESPONSE_MATCH.match(line) + + if not match: + raise MissingChecksum(line) + + response, checksum = match.groups() + + # TODO(flameeyes) check that the checksum is actually valid + return response + + def _SendOnelinerCommand(self, cmd): + """Send command and read a one-line response. + + Args: + cmd: command and parameters to send (without newline) + + Returns: + A single line of text that the glucometer responds, without the checksum. + """ + self._SendCommand(cmd) + + line = self.serial_.readline().decode('ascii') + return self._ValidateAndStripChecksum(line) + + def GetVersion(self): + """Returns an identifier of the firmware version of the glucometer. + + Returns: + The software version returned by the glucometer, such as + "P02.00.00 30/08/06". + """ + response = self._SendOnelinerCommand('DM?') + + if response[0] != '?': + raise InvalidResponse(response) + + return response[1:] + + _SERIAL_NUMBER_RE = re.compile('^@ "([A-Z0-9]{9})"$') + + def GetSerialNumber(self): + """Retrieve the serial number of the device. + + Returns: + A string representing the serial number of the device. + + Raises: + exceptions.InvalidResponse: if the DM@ command returns a string not + matching _SERIAL_NUMBER_RE. + InvalidSerialNumber: if the returned serial number does not match + the OneTouch2 device as per specs. + """ + response = self._SendOnelinerCommand('DM@') + + match = self._SERIAL_NUMBER_RE.match(response) + if not match: + raise exceptions.InvalidResponse(response) + + serial_number = match.group(1) + + # 'Y' at the far right of the serial number is the indication of a OneTouch + # Ultra2 device, as per specs. + if serial_number[-1] != 'Y': + raise InvalidSerialNumber('Serial number %s is invalid.' % serial_number) + + return serial_number + + # The [TF] at the start is to accept both Get (F) and Set (T) commands. + _DATETIME_RE = re.compile( + r'^"[A-Z]{3}","([0-9]{2}/[0-9]{2}/[0-9]{2})","([0-9]{2}:[0-9]{2}:[0-9]{2}) "$') + + def _ParseDateTime(self, response): + """Convert a response with date and time from the meter into a datetime. + + Args: + response: the response coming from a DMF or DMT command + + Returns: + A datetime object built according to the returned response. + + Raises: + InvalidResponse if the string cannot be matched by _DATETIME_RE. + """ + match = self._DATETIME_RE.match(response) + if not match: + raise exceptions.InvalidResponse(response) + + date, time = match.groups() + month, day, year = [int(part) for part in date.split('/')] + hour, minute, second = [int(part) for part in time.split(':')] + + # Yes, OneTouch2's firmware is not Y2K safe. + return datetime.datetime(2000 + year, month, day, hour, minute, second) + + def GetDateTime(self): + """Returns the current date and time for the glucometer. + + Returns: + A datetime object built according to the returned response. + """ + response = self._SendOnelinerCommand('DMF') + return self._ParseDateTime(response[2:]) + + def SetDateTime(self, date=datetime.datetime.now()): + """Sets the date and time of the glucometer. + + Args: + date: The value to set the date/time of the glucometer to. If none is + given, the current date and time of the computer is used. + + Returns: + A datetime object built according to the returned response. + """ + response = self._SendOnelinerCommand( + 'DMT' + date.strftime('%m/%d/%y %H:%M:%S')) + + return self._ParseDateTime(response[2:]) + + def _ParseGlucoseUnit(self, unit): + """Parses the value of a OneTouch Ultra Glucose unit definition. + + Args: + unit: the string reported by the glucometer as glucose unit. + + Return: + common.UNIT_MGDL: if the glucometer reads in mg/dL + common.UNIT_MMOLL: if the glucometer reads in mmol/L + + Raises: + exceptions.InvalidGlucoseUnit: if the unit is not recognized + """ + if unit == 'MG/DL ': + return common.UNIT_MGDL + elif unit == 'MMOL/L': + return common.UNIT_MMOLL + else: + raise exceptions.InvalidGlucoseUnit(string) + + _GLUCOSE_UNIT_RE = re.compile(r'^SU\?,"(MG/DL |MMOL/L)"') + + def GetGlucoseUnit(self): + """Returns a constant representing the unit for the dumped readings. + + Returns: + common.UNIT_MGDL: if the glucometer reads in mg/dL + common.UNIT_MMOLL: if the glucometer reads in mmol/L + """ + response = self._SendOnelinerCommand('DMSU?') + + match = self._GLUCOSE_UNIT_RE.match(response) + return self._ParseGlucoseUnit(match.group(1)) + + _DUMP_HEADER_RE = re.compile(r'P ([0-9]{3}),"[0-9A-Z]{9}","(MG/DL |MMOL/L)"') + _DUMP_LINE_RE = re.compile(r'P ("[A-Z]{3}","[0-9/]{8}","[0-9:]{8} "),"([ 0-9.]{6})",') + + def GetReadings(self, unit=None): + """Iterates over the reading values stored in the glucometer. + + Args: + unit: The glucose unit to use for the output. + + Yields: + A tuple (date, value) of the readings in the glucometer. The value is a + floating point in the unit specified; if no unit is specified, the default + unit in the glucometer will be used. + + Raises: + exceptions.InvalidResponse: if the response does not match what expected. + """ + self._SendCommand('DMP') + data = self.serial_.readlines() + + header = data.pop(0).decode('ascii') + match = self._DUMP_HEADER_RE.match(header) + if not match: + raise exceptions.InvalidResponse(header) + + final_unit = unit or self._ParseGlucoseUnit(match.group(2)) + count = int(match.group(1)) + assert count == len(data) + + for line in data: + line = self._ValidateAndStripChecksum(line.decode('ascii')) + + match = self._DUMP_LINE_RE.match(line) + if not match: + raise exceptions.InvalidResponse(line) + + date = self._ParseDateTime(match.group(1)) + + # OneTouch2 always returns the data in mg/dL even if the + # glucometer is set to mmol/L. We need to convert it to the + # requested unit here. + value = common.ConvertGlucoseUnit(int(match.group(2)), + common.UNIT_MGDL, unit) + + yield (date, value) diff --git a/glucometerutils/exceptions.py b/glucometerutils/exceptions.py new file mode 100644 index 0000000..41dd701 --- /dev/null +++ b/glucometerutils/exceptions.py @@ -0,0 +1,29 @@ +"""Common exceptions for glucometerutils.""" + +__author__ = 'Diego Elio Pettenò' +__email__ = 'flameeyes@flameeyes.eu' +__copyright__ = 'Copyright © 2013, Diego Elio Pettenò' +__license__ = 'GPL v3 or later' + +class Error(Exception): + """Base class for the errors.""" + + +class InvalidResponse(Error): + """The response received from the meter was not understood""" + + def __init__(self, response): + self.response = response + + def __str__(self): + return 'Invalid response received:\n%s' % self.response + + +class InvalidGlucoseUnit(Error): + """Unable to parse the given glucose unit""" + + def __init__(self, unit): + self.unit = unit + + def __str__(self): + return 'Invalid glucose unit received:\n%s' % self.unit diff --git a/gpl-3.txt b/gpl-3.txt new file mode 100644 index 0000000..94a9ed0 --- /dev/null +++ b/gpl-3.txt @@ -0,0 +1,674 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/> + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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But first, please read +<http://www.gnu.org/philosophy/why-not-lgpl.html>. diff --git a/setup.py b/setup.py new file mode 100644 index 0000000..0613b21 --- /dev/null +++ b/setup.py @@ -0,0 +1,24 @@ +from distutils.core import setup + +setup( + name = 'glucometerutils', + packages = ['glucometerutils', 'glucometerutils.drivers'], + scripts = ['glucometer.py'], + version = '1', + description = 'Glucometer access utilities', + author = 'Diego Elio Pettenò', + author_email = 'flameeyes@flameeyes.eu', + url = 'https://www.flameeyes.eu/projects/glucometerutils', + download_url = 'https://www.flameeyes.eu/files/glucometerutils.tgz', + keywords = ['glucometer', 'diabetes'], + classifiers = [ + 'Programming Language :: Python', + 'Programming Language :: Python :: 3', + 'Development Status :: 4 - Beta', + 'Environment :: Console', + 'Operating System :: OS Independent', + 'License :: OSI Approved :: GNU General Public License v3 or later (GPLv3+)', + 'Intended Audience :: End Users/Desktop', + 'Topic :: Scientific/Engineering :: Medical Science Apps.', + ], +) diff --git a/test/test_otultra2.py b/test/test_otultra2.py new file mode 100644 index 0000000..f8e0cb1 --- /dev/null +++ b/test/test_otultra2.py @@ -0,0 +1,48 @@ +import os +import sys +import unittest + +import mock + +sys.path.append(os.path.dirname(os.path.dirname(os.path.abspath(__file__)))) + +from glucometerutils import common +from glucometerutils.drivers import otultra2 +from glucometerutils import exceptions + +class TestOTUltra2(unittest.TestCase): + def setUp(self): + self.addCleanup(mock.patch.stopall) + + mock_serial = mock.patch('serial.Serial').start() + self.mock_readline = mock_serial.return_value.readline + + self.device = otultra2.Device('mockdevice') + + def testMissingChecksum(self): + self.mock_readline.return_value = bytes('INVALID', 'ascii') + + self.assertRaises(otultra2.MissingChecksum, + self.device.GetSerialNumber) + + def testShortResponse(self): + self.mock_readline.return_value = bytes('.\r', 'ascii') + + self.assertRaises(exceptions.InvalidResponse, + self.device.GetSerialNumber) + + def testInvalidResponse(self): + self.mock_readline.return_value = bytes('% 1337\r', 'ascii') + + self.assertRaises(exceptions.InvalidResponse, + self.device.GetSerialNumber) + + def testInvalidSerialNumber(self): + self.mock_readline.return_value = bytes( + '@ "12345678O" 1337\r', 'ascii') + + self.assertRaises(otultra2.InvalidSerialNumber, + self.device.GetSerialNumber) + +if __name__ == '__main__': + unittest.main() |