diff options
| -rw-r--r-- | glucometerutils/drivers/fsfreedomlite.py | 152 |
1 files changed, 57 insertions, 95 deletions
diff --git a/glucometerutils/drivers/fsfreedomlite.py b/glucometerutils/drivers/fsfreedomlite.py index f2a9db8..fe9acd1 100644 --- a/glucometerutils/drivers/fsfreedomlite.py +++ b/glucometerutils/drivers/fsfreedomlite.py @@ -1,3 +1,4 @@ + # -*- coding: utf-8 -*- # # SPDX-FileCopyrightText: © 2021 Stefanie Tellex @@ -14,7 +15,7 @@ Expected device path: /dev/ttyUSB0 or similar serial port device. Further information on the device protocol can be found at -https://protocols.glucometers.tech/abbott/freestyle-optium +https://protocols.glucometers.tech/abbott/freestyle-lite.html """ import datetime @@ -25,11 +26,16 @@ from typing import Generator, NoReturn, Sequence from glucometerutils import common, driver, exceptions from glucometerutils.support import serial -_CLOCK_RE = re.compile( - r"^Clock:\t(?P<month>[A-Z][a-z]{2}) (?P<day>[0-9]{2}) (?P<year>[0-9]{4})\t" +_CLOCK_INIT_RE = re.compile( + r"^(?P<month>[A-Z][a-z]{2}) (?P<day>[0-9]{2}) (?P<year>[0-9]{4}) " r"(?P<time>[0-9]{2}:[0-9]{2}:[0-9]{2})$" ) +_CLOCK_READING_RE = re.compile( + r"^(?P<month>[A-Z][a-z]{2}) (?P<day>[0-9]{2}) (?P<year>[0-9]{4}) " + r"(?P<time>[0-9]{2}:[0-9]{2})$" +) + # The reading can be HI (padded to three-characters by a space) if the value was # over what the meter was supposed to read. Unlike the "Clock:" line, the months # of June and July are written in full, everything else is truncated to three @@ -66,13 +72,13 @@ _MONTH_MATCHES = { } -def _parse_clock(datestr: str) -> datetime.datetime: - """Convert the date/time string used by the device into a datetime. +def _parse_clock_init(datestr: str) -> datetime.datetime: + """Convert the date/time string used by the device when it sends the current time into a datetime. This one has seconds. Args: - datestr: a string as returned by the device during information handling. + datestr: a string as returned by the device during initialization. """ - match = _CLOCK_RE.match(datestr) + match = _CLOCK_INIT_RE.match(datestr) if not match: raise exceptions.InvalidResponse(datestr) @@ -86,9 +92,31 @@ def _parse_clock(datestr: str) -> datetime.datetime: return datetime.datetime(year, month, day, hour, minute, second) +def _parse_clock_reading(datestr: str) -> datetime.datetime: + """Convert the date/time string used by the device into a datetime. + + Args: + datestr: a string as returned by the device during glucose readings into a datetime. This one does not have seconds. + """ + match = _CLOCK_READING_RE.match(datestr) + if not match: + raise exceptions.InvalidResponse(datestr) + + # int() parses numbers in decimal, so we don't have to worry about '08' + day = int(match.group("day")) + month = _MONTH_MATCHES[match.group("month")] + year = int(match.group("year")) + + hour, minute = (int(x) for x in match.group("time").split(":")) + second = 0 + + return datetime.datetime(year, month, day, hour, minute, second) + + class Device(serial.SerialDevice, driver.GlucometerDevice): BAUDRATE = 19200 - DEFAULT_CABLE_ID = "1a61:3420" + #DEFAULT_CABLE_ID = "1a61:3420" + DEFAULT_CABLE_ID = "0403:6001" def _send_command(self, command: str) -> Sequence[str]: cmd_bytes = bytes("$%s\r\n" % command, "ascii") @@ -107,34 +135,27 @@ class Device(serial.SerialDevice, driver.GlucometerDevice): return decoded_response def connect(self) -> None: - self._send_command("xmem") # ignore output this time self._fetch_device_information() def disconnect(self) -> None: # pylint: disable=no-self-use return def _fetch_device_information(self) -> None: - data = self._send_command("colq") - - for line in data: - parsed_line = line.split("\t") - - if parsed_line[0] == "S/N:": - self.device_serialno_ = parsed_line[1] - elif parsed_line[0] == "Ver:": - self.device_version_ = parsed_line[1] - if parsed_line[2] == "MMOL": - self.device_glucose_unit_ = common.Unit.MMOL_L - else: # I only have a mmol/l device, so I can't be sure. - self.device_glucose_unit_ = common.Unit.MG_DL - # There are more entries: Clock, Market, ROM and Usage, but we don't - # care for those here. - elif parsed_line[0] == "CMD OK": - return - - # I have not figured out why this happens, but sometimes it's echoing - # back the commands and not replying to them. - raise exceptions.ConnectionFailed() + data = self._send_command("mem") + + lines = [line for line in data] + self.device_serialno_ = data[1] + self.device_version_ = data[2] + self.device_datetime_ = _parse_clock_init(data[3]) + + numlines = int(data[4]) + + self._readings = [] + for line in data[6:6+numlines]: + glucose = int(line[0:3]) + timestamp = _parse_clock_reading(line[5:23]) + self._readings.append(common.GlucoseReading(timestamp, glucose)) + def get_meter_info(self) -> common.MeterInfo: """Fetch and parses the device information. @@ -143,7 +164,7 @@ class Device(serial.SerialDevice, driver.GlucometerDevice): A common.MeterInfo object. """ return common.MeterInfo( - "Freestyle Optium glucometer", + "Freestyle Freedom Lite", serial_number=self.get_serial_number(), version_info=("Software version: " + self.get_version(),), native_unit=self.get_glucose_unit(), @@ -172,7 +193,7 @@ class Device(serial.SerialDevice, driver.GlucometerDevice): common.Unit.MG_DL: if the glucometer displays in mg/dL common.Unit.MMOL_L: if the glucometer displays in mmol/L """ - return self.device_glucose_unit_ + return common.Unit.MG_DL def get_datetime(self) -> datetime.datetime: """Returns the current date and time for the glucometer. @@ -180,24 +201,10 @@ class Device(serial.SerialDevice, driver.GlucometerDevice): Returns: A datetime object built according to the returned response. """ - data = self._send_command("colq") - - for line in data: - if not line.startswith("Clock:"): - continue - - return _parse_clock(line) - - raise exceptions.InvalidResponse("\n".join(data)) + return self.device_datetime_ def _set_device_datetime(self, date: datetime.datetime) -> datetime.datetime: - data = self._send_command(date.strftime("tim,%m,%d,%y,%H,%M")) - - parsed_data = "".join(data) - if parsed_data != "CMD OK": - raise exceptions.InvalidResponse(parsed_data) - - return self.get_datetime() + raise NotImplementedError def zero_log(self) -> NoReturn: raise NotImplementedError @@ -217,50 +224,5 @@ class Device(serial.SerialDevice, driver.GlucometerDevice): expected. """ - data = self._send_command("xmem") - - # The first line is empty, the second is the serial number, the third - # the version, the fourth the current time, and the fifth the record - # count.. The last line has a checksum and the end. - count = int(data[4]) - if count != (len(data) - 6): - raise exceptions.InvalidResponse("\n".join(data)) - - # Extract the checksum from the last line. - checksum_match = _CHECKSUM_RE.match(data[-1]) - if not checksum_match: - raise exceptions.InvalidResponse("\n".join(data)) - - expected_checksum = int(checksum_match.group("checksum"), 16) - # exclude the last line in the checksum calculation, as that's the - # checksum itself. The final \r\n is added separately. - calculated_checksum = sum(ord(c) for c in "\r\n".join(data[:-1])) + 0xD + 0xA - - if expected_checksum != calculated_checksum: - raise exceptions.InvalidChecksum(expected_checksum, calculated_checksum) - - for line in data[5:-1]: - match = _READING_RE.match(line) - if not match: - raise exceptions.InvalidResponse(line) - - if match.group("type") != "G": - logging.warning("Non-glucose readings are not supported, ignoring.") - continue - - if match.group("reading") == "HI ": - value = float("inf") - else: - value = float(match.group("reading")) - - day = int(match.group("day")) - month = _MONTH_MATCHES[match.group("month")] - year = int(match.group("year")) - - hour, minute = map(int, match.group("time").split(":")) - - timestamp = datetime.datetime(year, month, day, hour, minute) - - # The reading, if present, is always in mg/dL even if the glucometer - # is set to mmol/L. - yield common.GlucoseReading(timestamp, value) + for r in self._readings: + yield r |