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# -*- coding: utf-8 -*-
"""Driver for FreeStyle InsuLinx devices.
Supported features:
- get readings;
- get and set date and time;
- get serial number and software version.
Expected device path: /dev/hidraw9 or similar HID device. Optional when using
HIDAPI.
WARNING: currently untested! Based off reverse engineering notes provided by
Xavier Claessens.
"""
__author__ = 'Diego Elio Pettenò'
__email__ = 'flameeyes@flameeyes.com'
__copyright__ = 'Copyright © 2017, Diego Elio Pettenò'
__license__ = 'MIT'
import collections
import datetime
from glucometerutils import common
from glucometerutils.support import freestyle
# The type is a string because it precedes the parsing of the object.
_TYPE_GLUCOSE_READING = '0'
_InsulinxReading = collections.namedtuple('_InsulinxReading', (
'type', # 0 = blood glucose
'id',
'month', 'day', 'year', # year is two-digits
'hour', 'minute',
'unknown1', 'unknown2', 'unknown3',
'unknown4', 'unknown5', 'unknown6',
'value',
'unknown7', 'unknown8',
))
class Device(freestyle.FreeStyleHidDevice):
"""Glucometer driver for FreeStyle InsuLinux devices."""
USB_PRODUCT_ID = 0x3460
def get_meter_info(self):
"""Return the device information in structured form."""
return common.MeterInfo(
'FreeStyle InsuLinx',
serial_number=self.get_serial_number(),
version_info=(
'Software version: ' + self._get_version(),),
native_unit=self.get_glucose_unit())
def get_glucose_unit(self): # pylint: disable=no-self-use
"""Returns the glucose unit of the device."""
return common.Unit.MG_DL
def get_readings(self):
"""Iterate through the reading records in the device."""
for record in self._get_multirecord(b'$result?'):
if not record or record[0] != _TYPE_GLUCOSE_READING:
continue
# Build a reading object by parsing each of the entries in the CSV
# as integers.
raw_reading = _InsulinxReading._make([int(v) for v in record])
timestamp = datetime.datetime(
raw_reading.year + 2000, raw_reading.month, raw_reading.day,
raw_reading.hour, raw_reading.minute)
yield common.GlucoseReading(timestamp, raw_reading.value)
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