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
diff --git a/README b/README
new file mode 100644
index 0000000..b2bbdc0
--- /dev/null
+++ b/README
@@ -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
+
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+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.  By contrast,
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+share and change all versions of a program--to make sure it remains free
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+your programs, too.
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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()