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# -*- coding: utf-8 -*-
#
# SPDX-FileCopyrightText: © 2017 The glucometerutils Authors
# SPDX-License-Identifier: MIT
"""Driver for FreeStyle Precision Neo devices.
This driver may also work with FreeStyle Optium Neo devices, but it is currently
untested.
Supported features:
- get readings;
- get and set date and time;
- get serial number and software version;
- get and set patient name.
Expected device path: /dev/hidraw9 or similar HID device. Optional when using
HIDAPI.
Further information on the device protocol can be found at
https://protocols.glucometers.tech/abbott/freestyle-precision-neo
"""
import dataclasses
import datetime
from typing import Generator, NoReturn, Optional, Sequence, Type
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 = "7"
_TYPE_KETONE_READING = "9"
@dataclasses.dataclass
class _NeoReading:
type: int # 7 = blood glucose, 9 = blood ketone
id: int
month: int
day: int
year: int # year is two-digits
hour: int
minute: int
unknown: int
value: float
# Extra trailing and so-far-unused fields; so discard them:
# * for blood glucose: 10 unknown trailing fields
# 'unknown3', 'unknown4', 'unknown5', 'unknown6', 'unknown7',
# 'unknown8', 'unknown9', 'unknown10', 'unknown11', 'unknown12',
# * for blood ketone: 2 unknown trailing fields
# 'unknown3', 'unknown4',
def __init__(self, record: Sequence[str]) -> None:
for idx, field in enumerate(dataclasses.fields(self)):
if record[idx] == "HI":
setattr(self, field.name, float("inf"))
elif record[idx] == "LO":
setattr(self, field.name, -float("inf"))
else:
setattr(self, field.name, int(record[idx]))
class Device(freestyle.FreeStyleHidDevice):
"""Glucometer driver for FreeStyle Precision Neo devices."""
def __init__(self, device_path: Optional[str]):
super().__init__(0x3850, device_path)
def get_meter_info(self) -> common.MeterInfo:
"""Return the device information in structured form."""
return common.MeterInfo(
"FreeStyle Precision Neo",
serial_number=self.get_serial_number(),
version_info=("Software version: " + self._get_version(),),
native_unit=self.get_glucose_unit(),
patient_name=self.get_patient_name(),
)
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?"):
cls: Optional[Type[common.AnyReading]] = None
if record and record[0] == _TYPE_GLUCOSE_READING:
cls = common.GlucoseReading
elif record and record[0] == _TYPE_KETONE_READING:
cls = common.KetoneReading
else:
continue
# Build a _NeoReading object by parsing each of the entries in the raw
# record
raw_reading = _NeoReading(record)
timestamp = datetime.datetime(
raw_reading.year + 2000,
raw_reading.month,
raw_reading.day,
raw_reading.hour,
raw_reading.minute,
)
if record and record[0] == _TYPE_KETONE_READING:
value = freestyle.convert_ketone_unit(raw_reading.value)
else:
value = raw_reading.value
yield cls(timestamp, value)
def zero_log(self) -> NoReturn:
raise NotImplementedError
|
