def __get_sensor_temperature(self, serial):
""" Private method used to retrieve temperature from real sensor
"""
logging.debug("Reading temperature from DS18B20 sensor " "with Serial [{0}]".format(serial))
ds18b20Sensor = W1ThermSensor(W1ThermSensor.THERM_SENSOR_DS18B20, serial)
logging.debug("Instantiated DS18B20 temperature sensor " "with Serial [{0}]".format(serial))
if DEFAULT_TEMPERATURE_UNIT == TEMPERATURE_ENUM.degC:
temperature = ds18b20Sensor.get_temperature(W1ThermSensor.DEGREES_C)
elif DEFAULT_TEMPERATURE_UNIT == TEMPERATURE_ENUM.degK:
degF_temperature = ds18b20Sensor.get_temperature(W1ThermSensor.DEGREES_F)
# sensor only supports Celsius and Fahrenheit.
# We should therefore use pint to convert to Kelvin
logging.debug(
"Kevin unit is not supporte by sensor "
"with serial [{0}]. Using pint to "
"convert [{1}] to degK".format(serial, degF_temperature)
)
temperature = convert_unit(
UNIT_TYPES_ENUM.temperature, TEMPERATURE_ENUM.degF, temperature, TEMPERATURE_ENUM.degK
)
elif DEFAULT_TEMPERATURE_UNIT == TEMPERATURE_ENUM.degF:
temperature = ds18b20Sensor.get_temperature(W1ThermSensor.DEGREES_F)
else:
# should never get here (sanity only).
raise Exception("Invalid [{0}]".format(DEFAULT_TEMPERATURE_UNIT))
return temperature
def convert(from_value, from_unit, to_unit):
"""convert length units.
Parameters
----------
from_value: str (required)
numeric value
from_unit: str (required)
length unit
to_unit: str (required)
length unit
Returns
-------
float:
the converted value
"""
if not is_number(from_value):
raise IllegalArgumentException(
("Parameter from_value=[{0}] not valid. "
"A numeric value must be provided.").format(from_value))
if is_blank(from_unit):
raise IllegalArgumentException(
("Parameter from_unit=[{0}] not valid. A unit be provided.")
.format(from_unit))
if is_blank(to_unit):
raise IllegalArgumentException(
("Parameter to_unit=[{0}] not valid. A unit be provided.")
.format(to_unit))
if from_unit == to_unit:
raise IllegalArgumentException(
("from_unit=[{0}] and to_unit=[{1}] units cannot be equal")
.format(from_unit, to_unit))
# pint temperature units need to be lower-cased or degC, degF, degK
from_unit = from_unit.lower().strip()
if from_unit == "degc":
from_unit = "degC"
elif from_unit == "degf":
from_unit = "degF"
elif from_unit == "degk":
from_unit = "degK"
# pint temperature units need to be lower-cased or degC, degF, degK
to_unit = to_unit.lower().strip()
if to_unit == "degc":
to_unit = "degC"
elif to_unit == "degf":
to_unit = "degF"
elif to_unit == "degk":
to_unit = "degK"
result = convert_unit(UNIT_TYPES_ENUM.temperature, from_unit,
from_value, to_unit)
return result
def convert(from_value, from_unit, to_unit):
"""convert length units.
Parameters
----------
from_value: float (required)
numeric value
from_unit: str (required)
length unit
to_unit: str (required)
length unit
Returns
-------
float:
the converted value
"""
if not is_number(from_value):
raise IllegalArgumentException(
("Parameter from_value=[{0}] not valid. "
"A numeric value must be provided.").format(from_value))
if is_blank(from_unit):
raise IllegalArgumentException(
("Parameter from_unit=[{0}] not valid. A unit be provided.")
.format(from_unit))
if is_blank(to_unit):
raise IllegalArgumentException(
("Parameter to_unit=[{0}] not valid. A unit be provided.")
.format(to_unit))
if from_unit == to_unit:
raise IllegalArgumentException(
("from_unit=[{0}] and to_unit=[{1}] units cannot be equal")
.format(from_unit, to_unit))
# pint unit registry only accepts lower case letters for length units
from_unit = from_unit.lower().strip()
to_unit = to_unit.lower().strip()
result = convert_unit(UNIT_TYPES_ENUM.length, from_unit,
from_value, to_unit)
return result
