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# -*- coding: utf-8 -*-
#
# SPDX-License-Identifier: MIT
"""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.
"""
import collections
import datetime
from typing import Generator, NoReturn, Optional
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."""
def __init__(self, device_path: Optional[str]) -> None:
super().__init__(0x3460, device_path)
def get_meter_info(self) -> common.MeterInfo:
"""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) -> common.Unit: # pylint: disable=no-self-use
"""Returns the glucose unit of the device."""
return common.Unit.MG_DL
def get_readings(self) -> Generator[common.AnyReading, None, None]:
"""Iterate through the reading records in the device."""
for record in self._session.query_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)
def zero_log(self) -> NoReturn:
raise NotImplementedError
|
