def get_glucose_unit(self) -> common.Unit:
"""Returns a constant representing the unit displayed by the meter.
Returns:
common.Unit.MG_DL: if the glucometer displays in mg/dL
common.Unit.MMOL_L: if the glucometer displays in mmol/L
Raises:
exceptions.InvalidGlucoseUnit: if the unit is not recognized
OneTouch meters will always dump data in mg/dL because that's their
internal storage. They will then provide a separate method to read the
unit used for display. This is not settable by the user in all modern
meters.
"""
response = self._send_oneliner_command("DMSU?")
match = self._GLUCOSE_UNIT_RE.match(response)
if match is None:
raise exceptions.InvalidGlucoseUnit(response)
unit = match.group(1)
if unit == "MG/DL ":
return common.Unit.MG_DL
if unit == "MMOL/L":
return common.Unit.MMOL_L
raise exceptions.InvalidGlucoseUnit(response)
def convert_glucose_unit(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)
def get_glucose_unit(self):
unit_value = self._read_parameter(_PARAMETER_KEY_UNIT)
if unit_value == b'\x00\x00\x00\x00':
return common.UNIT_MGDL
elif unit_value == b'\x01\x00\x00\x00':
return common.UNIT_MMOLL
else:
raise exceptions.InvalidGlucoseUnit('%r' % unit_value)
