def get_measurement(self):
""" Gets the pwm """
self._frequency = None
self._pulse_width = None
self._duty_cycle = None
pi = self.pigpio.pi()
if not pi.connected: # Check if pigpiod is running
self.logger.error("Could not connect to pigpiod."
"Ensure it is running and try again.")
return None, None, None
read_pwm = ReadPWM(pi, self.gpio, self.pigpio, self.weighting)
time.sleep(self.sample_time)
frequency = convert_units(
'frequency', 'Hz', self.convert_to_unit,
read_pwm.frequency())
pulse_width = int(read_pwm.pulse_width() + 0.5)
duty_cycle = read_pwm.duty_cycle()
read_pwm.cancel()
pi.stop()
duty_cycle = convert_units(
'duty_cycle', 'percent', self.convert_to_unit,
duty_cycle)
return frequency, pulse_width, duty_cycle
def get_measurement(self):
""" Gets the measurement in units by reading the """
self._altitude = None
self._dew_point = None
self._humidity = None
self._pressure = None
self._temperature = None
temperature = convert_units(
'temperature', 'C', self.convert_to_unit,
self.sensor.read_temperature())
pressure_pa = self.sensor.read_pressure()
pressure = convert_units(
'pressure', 'Pa', self.convert_to_unit,
pressure_pa)
alt = convert_units(
'altitude', 'm', self.convert_to_unit,
altitude(pressure_pa))
humidity = convert_units(
'humidity', 'percent', self.convert_to_unit,
self.sensor.read_humidity())
dew_pt = convert_units(
'dewpoint', 'C', self.convert_to_unit,
calculate_dewpoint(temperature, humidity))
return alt, dew_pt, humidity, pressure, temperature
def get_measurement(self):
""" Measures temperature and humidity """
# Resetting these values ensures old measurements aren't mistaken for new measurements
self._dewpoint = None
self._humidity = None
self._temperature = None
dewpoint = None
humidity = None
temperature = None
# Actual input measurement code
try:
humidity = self.random.randint(0, 100)
temperature = self.random.randint(0, 50)
dewpoint = calculate_dewpoint(temperature, humidity)
except Exception as msg:
self.logger.error("Exception: {}".format(msg))
# Unit conversions
# A conversion may be specified for each measurement
# Humidity is returned as %, but may be converted to another unit (e.g. decimal)
humidity = convert_units('humidity', '%', self.convert_to_unit,
humidity)
# Temperature is returned as C, but may be converted to another unit (e.g. K, F)
temperature = convert_units('temperature', 'C', self.convert_to_unit,
temperature)
# Dewpoint is returned as C, but may be converted to another unit (e.g. K, F)
dewpoint = convert_units('dewpoint', 'C', self.convert_to_unit,
dewpoint)
return humidity, temperature, dewpoint
def get_measurement(self):
""" Gets the humidity and temperature """
self._dew_point = None
self._humidity = None
self._temperature = None
if not self.pi.connected: # Check if pigpiod is running
self.logger.error("Could not connect to pigpiod."
"Ensure it is running and try again.")
return None, None, None
self.htu_reset()
# wtreg = 0xE6
# rdreg = 0xE7
rdtemp = 0xE3
rdhumi = 0xE5
handle = self.pi.i2c_open(self.i2c_bus,
self.i2c_address) # open i2c bus
self.pi.i2c_write_byte(handle, rdtemp) # send read temp command
time.sleep(0.055) # readings take up to 50ms, lets give it some time
(_, byte_array) = self.pi.i2c_read_device(handle,
3) # vacuum up those bytes
self.pi.i2c_close(handle) # close the i2c bus
t1 = byte_array[0] # most significant byte msb
t2 = byte_array[1] # least significant byte lsb
temp_reading = (t1 *
256) + t2 # combine both bytes into one big integer
temp_reading = float(temp_reading)
temperature = (
(temp_reading / 65536) * 175.72) - 46.85 # formula from datasheet
handle = self.pi.i2c_open(self.i2c_bus,
self.i2c_address) # open i2c bus
self.pi.i2c_write_byte(handle, rdhumi) # send read humi command
time.sleep(0.055) # readings take up to 50ms, lets give it some time
(_, byte_array) = self.pi.i2c_read_device(handle,
3) # vacuum up those bytes
self.pi.i2c_close(handle) # close the i2c bus
h1 = byte_array[0] # most significant byte msb
h2 = byte_array[1] # least significant byte lsb
humi_reading = (h1 *
256) + h2 # combine both bytes into one big integer
humi_reading = float(humi_reading)
uncomp_humidity = (
(humi_reading / 65536) * 125) - 6 # formula from datasheet
humidity = ((25 - temperature) * -0.15) + uncomp_humidity
dew_pt = calculate_dewpoint(temperature, humidity)
# Check for conversions
dew_pt = convert_units('dewpoint', 'C', self.convert_to_unit, dew_pt)
temperature = convert_units('temperature', 'C', self.convert_to_unit,
temperature)
humidity = convert_units('humidity', 'percent', self.convert_to_unit,
humidity)
return dew_pt, humidity, temperature
def get_measurement(self):
""" Gets the measurement in units by reading the BMP180/085 """
time.sleep(2)
temperature = convert_units('temperature', 'C', self.convert_to_unit,
self.bmp.read_temperature())
pressure = convert_units('pressure', 'Pa', self.convert_to_unit,
self.bmp.read_pressure())
altitude = convert_units('altitude', 'm', self.convert_to_unit,
self.bmp.read_altitude())
return temperature, pressure, altitude
def get_measurement(self):
""" Gets the humidity and temperature """
self._dew_point = None
self._humidity = None
self._temperature = None
dew_point = None
humidity = None
temperature = None
for _ in range(2):
try:
# Send temperature measurement command
# 0xF3(243) NO HOLD master
self.sht2x.write_byte(self.i2c_address, 0xF3)
time.sleep(0.5)
# Read data back, 2 bytes
# Temp MSB, Temp LSB
data0 = self.sht2x.read_byte(self.i2c_address)
data1 = self.sht2x.read_byte(self.i2c_address)
temperature = -46.85 + (((data0 * 256 + data1) * 175.72) / 65536.0)
# Send humidity measurement command
# 0xF5(245) NO HOLD master
self.sht2x.write_byte(self.i2c_address, 0xF5)
time.sleep(0.5)
# Read data back, 2 bytes
# Humidity MSB, Humidity LSB
data0 = self.sht2x.read_byte(self.i2c_address)
data1 = self.sht2x.read_byte(self.i2c_address)
humidity = -6 + (((data0 * 256 + data1) * 125.0) / 65536.0)
dew_point = calculate_dewpoint(temperature, humidity)
return dew_point, humidity, temperature
except Exception as e:
self.logger.exception(
"Exception when taking a reading: {err}".format(err=e))
# Send soft reset and try a second read
self.sht2x.write_byte(self.i2c_address, 0xFE)
time.sleep(0.1)
dew_point = convert_units(
'dewpoint', 'C', self.convert_to_unit, dew_point)
temperature = convert_units(
'temperature', 'C', self.convert_to_unit, temperature)
humidity = convert_units(
'humidity', 'percent', self.convert_to_unit,
humidity)
return dew_point, humidity, temperature
def get_measurement(self):
""" Gets the measurement in units by reading the """
self._temperature = None
self._temperature_die = None
temp = self.sensor.readThermocoupleTemp()
temp = convert_units(
'temperature', 'C', self.convert_to_unit, temp)
temp_die = self.sensor.readJunctionTemp()
temp_die = convert_units(
'temperature_die', 'C', self.convert_to_unit, temp_die)
return temp, temp_die
def get_measurement(self):
""" Gets the measurement in units by reading the """
self._temperature = None
self._temperature_die = None
temp = self.sensor.readTempC()
temp = convert_units(
'temperature', 'C', self.convert_to_unit, temp)
temp_die = self.sensor.readInternalC()
temp_die = convert_units(
'temperature_die', 'C', self.convert_to_unit, temp_die)
return temp, temp_die
def get_measurement(self):
""" Gets the TMP006's temperature in Celsius """
self._temperature_die = None
self._temperature_object = None
self.sensor.begin()
temperature_die = convert_units('temperature_die', 'C',
self.convert_to_unit,
self.sensor.readDieTempC())
temperature_object = convert_units('temperature_object', 'C',
self.convert_to_unit,
self.sensor.readObjTempC())
return temperature_die, temperature_object
def math_sum_single(self, measurement_dict):
(device_id, math_dev_measurement, math_unit, measure_channel,
measure_unit,
measure_measurement) = self.return_single_measure_info()
try:
return_value = sum_past_seconds(device_id,
measure_unit,
measure_channel,
self.max_measure_age,
measure=measure_measurement)
if math_dev_measurement.conversion_id:
return_value = convert_units(
math_dev_measurement.conversion_id, return_value)
if return_value:
measurement_dict = {
math_dev_measurement.channel: {
'measurement': measure_measurement,
'unit': math_unit,
'value': return_value
}
}
else:
self.error_not_within_max_age()
except Exception as msg:
self.logger.exception("sum_single Error: {err}".format(err=msg))
return measurement_dict
def get_measurement(self):
""" Gets the DS18B20's temperature in Celsius """
self._temperature = None
temperature = None
n = 2
for i in range(n):
try:
temperature = self.sensor.get_temperature()
break
except Exception as e:
if i == n:
self.logger.exception(
"{cls} raised an exception when taking a reading: "
"{err}".format(cls=type(self).__name__, err=e))
time.sleep(1)
if temperature == 85:
self.logger.error(
"Measurement returned 85 C, "
"Indicating an issue communicating with the sensor.")
return None
elif temperature is not None and -55 > temperature > 125:
self.logger.error(
"Measurement outside the expected range of -55 C to 125 C: "
"{temp} C".format(temp=self._temperature))
return None
temperature = convert_units('temperature', 'C', self.convert_to_unit,
temperature)
return temperature
def get_measurement(self):
""" Gets the sensor's Electrical Conductivity measurement via UART/I2C """
self._electrical_conductivity = None
electrical_conductivity = None
# Read sensor via UART
if self.interface == 'UART':
if self.atlas_sensor_uart.setup:
lines = self.atlas_sensor_uart.query('R')
if lines:
self.logger.debug("All Lines: {lines}".format(lines=lines))
# 'check probe' indicates an error reading the sensor
if 'check probe' in lines:
self.logger.error('"check probe" returned from sensor')
# if a string resembling a float value is returned, this
# is out measurement value
elif str_is_float(lines[0]):
electrical_conductivity = float(lines[0])
self.logger.debug('Value[0] is float: {val}'.format(
val=electrical_conductivity))
else:
# During calibration, the sensor is put into
# continuous mode, which causes a return of several
# values in one string. If the return value does
# not represent a float value, it is likely to be a
# string of several values. This parses and returns
# the first value.
if str_is_float(lines[0].split(b'\r')[0]):
electrical_conductivity = lines[0].split(b'\r')[0]
# Lastly, this is called if the return value cannot
# be determined. Watchthe output in the GUI to see
# what it is.
else:
electrical_conductivity = lines[0]
self.logger.error(
'Value[0] is not float or "check probe": '
'{val}'.format(val=electrical_conductivity))
else:
self.logger.error('UART device is not set up.'
'Check the log for errors.')
# Read sensor via I2C
elif self.interface == 'I2C':
if self.atlas_sensor_i2c.setup:
ec_status, ec_str = self.atlas_sensor_i2c.query('R')
if ec_status == 'error':
self.logger.error(
"Sensor read unsuccessful: {err}".format(err=ec_str))
elif ec_status == 'success':
electrical_conductivity = float(ec_str)
else:
self.logger.error(
'I2C device is not set up. Check the log for errors.')
electrical_conductivity = convert_units('electrical_conductivity',
'μS_cm', self.convert_to_unit,
electrical_conductivity)
return electrical_conductivity
def get_measurement(self):
""" Gets the MH-Z16's CO2 concentration in ppmv via UART"""
self._co2 = None
co2 = None
if self.interface == 'UART':
if not self.serial_device: # Don't measure if device isn't validated
return None
self.ser.flushInput()
time.sleep(1)
self.ser.write(
bytearray(
[0xff, 0x01, 0x86, 0x00, 0x00, 0x00, 0x00, 0x00, 0x79]))
time.sleep(.01)
resp = self.ser.read(9)
if len(resp) != 0:
high = resp[2]
low = resp[3]
co2 = (high * 256) + low
elif self.interface == 'I2C':
self.write_register(self.FCR, 0x07)
self.send(self.cmd_measure)
try:
co2 = self.parse(self.receive())
except Exception:
co2 = None
co2 = convert_units('co2', 'ppm', self.convert_to_unit, co2)
return co2
def get_measurement(self, silent=False):
""" Gets the MH-Z19's CO2 concentration in ppmv via UART"""
self._co2 = None
co2 = None
if not self.serial_device: # Don't measure if device isn't validated
return None
self.ser.flushInput()
self.ser.write(
bytearray([0xff, 0x01, 0x86, 0x00, 0x00, 0x00, 0x00, 0x00, 0x79]))
time.sleep(.01)
resp = self.ser.read(9)
if resp[0] != 0xff or resp[1] != 0x86:
self.logger.error("Bad checksum")
elif len(resp) >= 4:
high = resp[2]
low = resp[3]
co2 = (high * 256) + low
else:
self.logger.error("Bad response")
co2 = convert_units('co2', 'ppm', self.convert_to_unit, co2)
return co2
def get_measurement(self):
""" Gets the revolutions """
self._revolutions = None
pi = self.pigpio.pi()
if not pi.connected: # Check if pigpiod is running
self.logger.error("Could not connect to pigpiod."
"Ensure it is running and try again.")
return None
read_revolutions = ReadRPM(pi, self.gpio, self.pigpio,
self.rpm_pulses_per_rev, self.weighting)
time.sleep(self.sample_time)
rpm = read_revolutions.RPM()
if rpm:
rpm = int(rpm + 0.5)
rpm = convert_units('revolutions', 'RPM', self.convert_to_unit, rpm)
read_revolutions.cancel()
pi.stop()
if rpm:
return rpm
elif rpm == 0:
return 0
else:
return None
def get_measurement(self):
""" Gets the measurement in units by reading the """
self._temperature = None
temp = self.sensor.readTemp(self.thermocouple_type, self.ref_ohm)
temp = convert_units('temperature', 'C', self.convert_to_unit, temp)
return temp
def get_measurement(self):
""" Gets the CO2, VOC, and temperature """
self._co2 = None
self._voc = None
self._temperature = None
temperature = convert_units('temperature', 'C', self.convert_to_unit,
self.sensor.calculateTemperature())
if not self.sensor.readData():
co2 = convert_units('co2', 'ppm', self.convert_to_unit,
self.sensor.geteCO2())
voc = convert_units('voc', 'ppb', self.convert_to_unit,
self.sensor.getTVOC())
return co2, voc, temperature
else:
return None, None, None
def get_measurement(self):
""" Gets the free space """
f = os.statvfs(self.path)
disk_space = (f.f_bsize * f.f_bavail) / 1000000.0
disk_space = convert_units('disk_space', 'MB', self.convert_to_unit,
disk_space)
return disk_space
def get_measurement(self):
""" Gets the light, moisture, and temperature """
self._lux = None
self._moisture = None
self._temperature = None
lux = self.filter_average('lux', measurement=self.light())
lux = convert_units(
'light', 'lux', self.convert_to_unit,
lux)
moisture = self.moist()
temperature = convert_units(
'temperature', 'C', self.convert_to_unit,
self.temp() / 10.0)
return lux, moisture, temperature
def get_measurement(self):
""" Calls the vcgencmd in a subprocess and reads the GPU temperature """
gputempstr = subprocess.check_output(
('/opt/vc/bin/vcgencmd',
'measure_temp')) # example output: temp=42.8'C
temperature = float(gputempstr.split('=')[1].split("'")[0])
temperature = convert_units('temperature', 'C', self.convert_to_unit,
temperature)
return temperature
def get_measurement(self):
""" Gets the TSL2591's lux """
full, ir = self.tsl.get_full_luminosity() # read raw values (full spectrum and ir spectrum)
# convert raw values to lux (and convert to user-selected unit, if necessary)
lux = convert_units(
'light', 'lux', self.convert_to_unit,
self.tsl.calculate_lux(full, ir))
return lux
def get_measurement(self):
""" Gets the humidity and temperature """
self._dew_point = None
self._humidity = None
self._temperature = None
temperature = convert_units('temperature', 'C', self.convert_to_unit,
self.sht_sensor.read_t())
humidity = self.sht_sensor.read_rh()
dew_point = self.sht_sensor.read_dew_point(temperature, humidity)
dew_point = convert_units('dewpoint', 'C', self.convert_to_unit,
dew_point)
humidity = convert_units('humidity', 'percent', self.convert_to_unit,
humidity)
return dew_point, humidity, temperature
def get_measurement(self):
""" Gets the measurement in units by reading the """
self._altitude = None
self._pressure = None
self._temperature = None
temperature = convert_units(
'temperature', 'C', self.convert_to_unit,
self.read_temperature())
pressure_pa = self.read_pressure()
pressure = convert_units(
'pressure', 'Pa', self.convert_to_unit,
pressure_pa)
alt = convert_units(
'altitude', 'm', self.convert_to_unit,
altitude(pressure_pa))
return temperature, pressure, alt
def get_measurement(self):
""" Gets the humidity and temperature """
self._dew_point = None
self._humidity = None
self._temperature = None
temperature = self.read_temperature()
humidity = self.read_humidity()
dew_pt = calculate_dewpoint(temperature, humidity)
# Check for conversions
dew_pt = convert_units('dewpoint', 'C', self.convert_to_unit, dew_pt)
temperature = convert_units('temperature', 'C', self.convert_to_unit,
temperature)
humidity = convert_units('humidity', 'percent', self.convert_to_unit,
humidity)
return dew_pt, humidity, temperature
def is_measurement_unit(self, unit_from, unit_to, value):
""" Converts value from one measurement to another """
if unit_from != unit_to:
for each_conv in db_retrieve_table_daemon(Conversion, entry='all'):
if (each_conv.convert_unit_from == unit_from
and each_conv.convert_unit_to == unit_to):
return_value = convert_units(each_conv.unique_id, value)
return return_value, 'success'
else:
self.logger.error(
"Could not find conversion for unit "
"{unit_from} to {unit_to}".format(unit_from=unit_from,
unit_to=unit_to))
return None, 'error'
def get_measurement(self):
""" Gets the measurement in units by reading resource """
self._disk_space = None
disk_space = None
try:
disk_space = resource.getrusage(
resource.RUSAGE_SELF).ru_maxrss / float(1000)
except Exception:
pass
disk_space = convert_units('disk_space', 'MB', self.convert_to_unit,
disk_space)
return disk_space
def get_measurement(self):
""" Gets the BH1750's lux """
self._lux = None
if self.resolution == 0:
lux = self.measure_low_res()
elif self.resolution == 1:
lux = self.measure_high_res()
elif self.resolution == 2:
lux = self.measure_high_res2()
else:
return None
lux = convert_units('light', 'lux', self.convert_to_unit, lux)
return lux
def get_measurement(self):
""" Gets the humidity and temperature """
self._dew_point = None
self._humidity = None
self._temperature = None
# Ensure if the power pin turns off, it is turned back on
if (self.power_output_id and db_retrieve_table_daemon(
Output, unique_id=self.power_output_id)
and self.control.output_state(self.power_output_id) == 'off'):
self.logger.error(
'Sensor power output {rel} detected as being off. '
'Turning on.'.format(rel=self.power_output_id))
self.start_sensor()
time.sleep(2)
# Try twice to get measurement. This prevents an anomaly where
# the first measurement fails if the sensor has just been powered
# for the first time.
for _ in range(2):
dew_point, humidity, temperature = self.return_measurements()
if dew_point is not None:
dew_point = convert_units('dewpoint', 'C',
self.convert_to_unit, dew_point)
temperature = convert_units('temperature', 'C',
self.convert_to_unit, temperature)
humidity = convert_units('humidity', 'percent',
self.convert_to_unit, humidity)
return dew_point, humidity, temperature # success - no errors
time.sleep(2)
# Measurement failure, power cycle the sensor (if enabled)
# Then try two more times to get a measurement
if self.power_output_id:
self.stop_sensor()
time.sleep(2)
self.start_sensor()
for _ in range(2):
dew_point, humidity, temperature = self.return_measurements()
if dew_point is not None:
dew_point = convert_units('dewpoint', 'C',
self.convert_to_unit, dew_point)
temperature = convert_units('temperature', 'C',
self.convert_to_unit,
temperature)
humidity = convert_units('humidity', 'percent',
self.convert_to_unit, humidity)
return dew_point, humidity, temperature # success
time.sleep(2)
self.logger.debug("Could not acquire a measurement")
return None, None, None
def get_measurement(self):
""" Gets the Raspberry pi's temperature in Celsius by reading the temp file and div by 1000 """
# import psutil
# import resource
# open_files_count = 0
# for proc in psutil.process_iter():
# if proc.open_files():
# open_files_count += 1
# self.logger.info("Open files: {of}".format(of=open_files_count))
# soft, hard = resource.getrlimit(resource.RLIMIT_NOFILE)
# self.logger.info("LIMIT: Soft: {sft}, Hard: {hrd}".format(sft=soft, hrd=hard))
with open('/sys/class/thermal/thermal_zone0/temp') as cpu_temp_file:
temperature = convert_units('temperature', 'C',
self.convert_to_unit,
float(cpu_temp_file.read()) / 1000)
return temperature
def get_measurement(self):
""" Gets the DS18S20's temperature in Celsius """
self._temperature = None
temperature = None
n = 2
for i in range(n):
try:
temperature = self.sensor.get_temperature()
break
except Exception as e:
if i == n:
self.logger.exception(
"{cls} raised an exception when taking a reading: "
"{err}".format(cls=type(self).__name__, err=e))
time.sleep(1)
temperature = convert_units('temperature', 'C', self.convert_to_unit,
temperature)
return temperature
def calculate_math(self):
measurement_dict = {}
if self.math_type == 'average':
device_measurement = self.device_measurements.filter(
DeviceMeasurements.channel == 0).first()
if device_measurement:
conversion = db_retrieve_table_daemon(
Conversion, unique_id=device_measurement.conversion_id)
else:
conversion = None
channel, unit, measurement = return_measurement_info(
device_measurement, conversion)
success, measure = self.get_measurements_from_str(self.inputs)
if success:
average = float(sum(measure) / float(len(measure)))
measurement_dict = {
channel: {
'measurement': measurement,
'unit': unit,
'value': average
}
}
elif measure:
self.logger.error(measure)
else:
self.error_not_within_max_age()
elif self.math_type == 'average_single':
device_id = self.inputs.split(',')[0]
measurement_id = self.inputs.split(',')[1]
device_measurement = db_retrieve_table_daemon(
DeviceMeasurements, unique_id=measurement_id)
if device_measurement:
conversion = db_retrieve_table_daemon(
Conversion, unique_id=device_measurement.conversion_id)
else:
conversion = None
channel, unit, measurement = return_measurement_info(
device_measurement, conversion)
try:
last_measurements = read_past_influxdb(
device_id,
unit,
measurement,
channel,
self.max_measure_age)
if last_measurements:
measure_list = []
for each_set in last_measurements:
if len(each_set) == 2:
measure_list.append(each_set[1])
average = sum(measure_list) / float(len(measure_list))
measurement_dict = {
channel: {
'measurement': measurement,
'unit': unit,
'value': average
}
}
else:
self.error_not_within_max_age()
except Exception as msg:
self.logger.exception("average_single Error: {err}".format(err=msg))
elif self.math_type == 'difference':
device_measurement = self.device_measurements.filter(
DeviceMeasurements.channel == 0).first()
if device_measurement:
conversion = db_retrieve_table_daemon(
Conversion, unique_id=device_measurement.conversion_id)
else:
conversion = None
channel, unit, measurement = return_measurement_info(
device_measurement, conversion)
success, measure = self.get_measurements_from_str(self.inputs)
if success:
if self.difference_reverse_order:
difference = measure[1] - measure[0]
else:
difference = measure[0] - measure[1]
if self.difference_absolute:
difference = abs(difference)
measurement_dict = {
channel: {
'measurement': measurement,
'unit': unit,
'value': difference
}
}
elif measure:
self.logger.error(measure)
else:
self.error_not_within_max_age()
elif self.math_type == 'equation':
device_measurement = self.device_measurements.filter(
DeviceMeasurements.channel == 0).first()
if device_measurement:
conversion = db_retrieve_table_daemon(
Conversion, unique_id=device_measurement.conversion_id)
else:
conversion = None
channel, unit, measurement = return_measurement_info(
device_measurement, conversion)
success, measure = self.get_measurements_from_str(self.inputs)
if success:
replaced_str = self.equation.replace('x', str(measure[0]))
equation_output = eval(replaced_str)
measurement_dict = {
channel: {
'measurement': measurement,
'unit': unit,
'value': float(equation_output)
}
}
elif measure:
self.logger.error(measure)
else:
self.error_not_within_max_age()
elif self.math_type == 'redundancy':
list_order = self.order_of_use.split(';')
measurement_success = False
for each_id_measurement_id in list_order:
device_id = each_id_measurement_id.split(',')[0]
measurement_id = each_id_measurement_id.split(',')[1]
device_measurement = self.device_measurements.filter(
DeviceMeasurements.channel == 0).first()
if device_measurement:
conversion = db_retrieve_table_daemon(
Conversion, unique_id=device_measurement.conversion_id)
else:
conversion = None
channel, unit, measurement = return_measurement_info(
device_measurement, conversion)
try:
success_measure, measure = self.get_measurements_from_id(
device_id, measurement_id)
if success_measure:
measurement_dict = {
channel: {
'measurement': measurement,
'unit': unit,
'value': float(measure[1]),
'timestamp': measure[0],
}
}
measurement_success = True
break
except Exception as msg:
self.logger.exception("redundancy Error: {err}".format(err=msg))
if not measurement_success:
self.error_not_within_max_age()
elif self.math_type == 'statistics':
success, measure = self.get_measurements_from_str(self.inputs)
if success:
# Perform some math
stat_mean = float(sum(measure) / float(len(measure)))
stat_median = median(measure)
stat_minimum = min(measure)
stat_maximum = max(measure)
stdev_ = stdev(measure)
stdev_mean_upper = stat_mean + stdev_
stdev_mean_lower = stat_mean - stdev_
list_measurement = [
stat_mean,
stat_median,
stat_minimum,
stat_maximum,
stdev_,
stdev_mean_upper,
stdev_mean_lower
]
for each_measurement in self.device_measurements.all():
conversion = db_retrieve_table_daemon(
Conversion, unique_id=each_measurement.conversion_id)
channel, unit, measurement = return_measurement_info(
each_measurement, conversion)
measurement_dict[channel] = {
'measurement': measurement,
'unit': unit,
'value': list_measurement[channel]
}
elif measure:
self.logger.error(measure)
else:
self.error_not_within_max_age()
elif self.math_type == 'verification':
device_measurement = self.device_measurements.filter(
DeviceMeasurements.channel == 0).first()
if device_measurement:
conversion = db_retrieve_table_daemon(
Conversion, unique_id=device_measurement.conversion_id)
else:
conversion = None
channel, unit, measurement = return_measurement_info(
device_measurement, conversion)
success, measure = self.get_measurements_from_str(self.inputs)
if (success and
max(measure) - min(measure) <
self.max_difference):
difference = max(measure) - min(measure)
measurement_dict = {
channel: {
'measurement': measurement,
'unit': unit,
'value': difference
}
}
elif measure:
self.logger.error(measure)
else:
self.error_not_within_max_age()
elif self.math_type == 'humidity':
pressure_pa = 101325
critical_error = False
if self.pressure_pa_id and self.pressure_pa_measure_id:
success_pa, pressure = self.get_measurements_from_id(
self.pressure_pa_id, self.pressure_pa_measure_id)
if success_pa:
pressure_pa = int(pressure[1])
# Pressure must be in Pa, convert if not
if db_retrieve_table_daemon(DeviceMeasurements, unique_id=self.pressure_pa_measure_id):
measurement = db_retrieve_table_daemon(DeviceMeasurements, unique_id=self.pressure_pa_measure_id)
else:
self.logger.error("Could not find pressure measurement")
measurement = None
critical_error = True
if measurement and measurement.unit != 'Pa':
for each_conv in db_retrieve_table_daemon(Conversion, entry='all'):
if (each_conv.convert_unit_from == measurement.unit and
each_conv.convert_unit_to == 'Pa'):
pressure_pa = convert_units(
each_conv.unique_id, pressure_pa)
else:
self.logger.error(
"Could not find conversion for unit "
"{unit} to Pa (Pascals)".format(
unit=measurement.unit))
critical_error = True
success_dbt, dry_bulb_t = self.get_measurements_from_id(
self.dry_bulb_t_id, self.dry_bulb_t_measure_id)
success_wbt, wet_bulb_t = self.get_measurements_from_id(
self.wet_bulb_t_id, self.wet_bulb_t_measure_id)
if success_dbt and success_wbt:
dbt_kelvin = float(dry_bulb_t[1])
wbt_kelvin = float(wet_bulb_t[1])
if db_retrieve_table_daemon(DeviceMeasurements, unique_id=self.dry_bulb_t_measure_id):
measurement = db_retrieve_table_daemon(DeviceMeasurements, unique_id=self.dry_bulb_t_measure_id)
else:
self.logger.error("Could not find pressure measurement")
measurement = None
critical_error = True
if measurement and measurement.unit != 'K':
conversion_found = False
for each_conv in db_retrieve_table_daemon(Conversion, entry='all'):
if (each_conv.convert_unit_from == measurement.unit and
each_conv.convert_unit_to == 'K'):
dbt_kelvin = convert_units(
each_conv.unique_id, dbt_kelvin)
conversion_found = True
if not conversion_found:
self.logger.error(
"Could not find conversion for unit "
"{unit} to K (Kelvin)".format(
unit=measurement.unit))
critical_error = True
if db_retrieve_table_daemon(DeviceMeasurements, unique_id=self.dry_bulb_t_measure_id):
measurement = db_retrieve_table_daemon(DeviceMeasurements, unique_id=self.dry_bulb_t_measure_id)
else:
self.logger.error("Could not find pressure measurement")
measurement = None
critical_error = True
if measurement and measurement.unit != 'K':
conversion_found = False
for each_conv in db_retrieve_table_daemon(Conversion, entry='all'):
if (each_conv.convert_unit_from == measurement.unit and
each_conv.convert_unit_to == 'K'):
wbt_kelvin = convert_units(
each_conv.unique_id, wbt_kelvin)
conversion_found = True
if not conversion_found:
self.logger.error(
"Could not find conversion for unit "
"{unit} to K (Kelvin)".format(
unit=measurement.unit))
critical_error = True
# Convert temperatures to Kelvin (already done above)
# dbt_kelvin = celsius_to_kelvin(dry_bulb_t_c)
# wbt_kelvin = celsius_to_kelvin(wet_bulb_t_c)
psypi = None
try:
if not critical_error:
psypi = SI.state(
"DBT", dbt_kelvin, "WBT", wbt_kelvin, pressure_pa)
else:
self.logger.error(
"One or more critical errors prevented the "
"humidity from being calculated")
except TypeError as err:
self.logger.error("TypeError: {msg}".format(msg=err))
if psypi:
percent_relative_humidity = psypi[2] * 100
# Ensure percent humidity stays within 0 - 100 % range
if percent_relative_humidity > 100:
percent_relative_humidity = 100
elif percent_relative_humidity < 0:
percent_relative_humidity = 0
# Dry bulb temperature: psypi[0])
# Wet bulb temperature: psypi[5])
specific_enthalpy = float(psypi[1])
humidity = float(percent_relative_humidity)
specific_volume = float(psypi[3])
humidity_ratio = float(psypi[4])
list_measurement = [
specific_enthalpy,
humidity,
specific_volume,
humidity_ratio
]
for each_measurement in self.device_measurements.all():
conversion = db_retrieve_table_daemon(
Conversion, unique_id=each_measurement.conversion_id)
channel, unit, measurement = return_measurement_info(
each_measurement, conversion)
measurement_dict[channel] = {
'measurement': measurement,
'unit': unit,
'value': list_measurement[channel]
}
else:
self.error_not_within_max_age()
elif self.math_type == 'vapor_pressure_deficit':
vpd_pa = None
critical_error = False
success_dbt, temperature = self.get_measurements_from_id(
self.unique_id_1, self.unique_measurement_id_1)
success_wbt, humidity = self.get_measurements_from_id(
self.unique_id_2, self.unique_measurement_id_2)
if success_dbt and success_wbt:
vpd_temperature_celsius = float(temperature[1])
vpd_humidity_percent = float(humidity[1])
if db_retrieve_table_daemon(
DeviceMeasurements,
unique_id=self.unique_measurement_id_1):
measurement = db_retrieve_table_daemon(
DeviceMeasurements,
unique_id=self.unique_measurement_id_1)
else:
self.logger.error("Could not find temperature measurement")
measurement = None
critical_error = True
if measurement and measurement.unit != 'C':
conversion_found = False
for each_conv in db_retrieve_table_daemon(Conversion, entry='all'):
if (each_conv.convert_unit_from == measurement.unit and
each_conv.convert_unit_to == 'C'):
vpd_temperature_celsius = convert_units(
each_conv.unique_id, vpd_temperature_celsius)
conversion_found = True
if not conversion_found:
self.logger.error(
"Could not find conversion for unit "
"{unit} to C (Celsius)".format(
unit=measurement.unit))
critical_error = True
if db_retrieve_table_daemon(
DeviceMeasurements,
unique_id=self.unique_measurement_id_2):
measurement = db_retrieve_table_daemon(
DeviceMeasurements,
unique_id=self.unique_measurement_id_2)
else:
self.logger.error("Could not find humidity measurement")
measurement = None
critical_error = True
if measurement and measurement.unit != 'percent':
conversion_found = False
for each_conv in db_retrieve_table_daemon(Conversion, entry='all'):
if (each_conv.convert_unit_from == measurement.unit and
each_conv.convert_unit_to == 'percent'):
vpd_humidity_percent = convert_units(
each_conv.unique_id, vpd_humidity_percent)
conversion_found = True
if not conversion_found:
self.logger.error(
"Could not find conversion for unit "
"{unit} to percent (%)".format(
unit=measurement.unit))
critical_error = True
try:
if not critical_error:
vpd_pa = calculate_vapor_pressure_deficit(
vpd_temperature_celsius, vpd_humidity_percent)
else:
self.logger.error(
"One or more critical errors prevented the "
"vapor pressure deficit from being calculated")
except TypeError as err:
self.logger.error("TypeError: {msg}".format(msg=err))
if vpd_pa:
measure = self.device_measurements.first()
conversion = db_retrieve_table_daemon(
Conversion, unique_id=measure.conversion_id)
channel, unit, measurement = return_measurement_info(
measure, conversion)
measurement_dict[channel] = {
'measurement': measurement,
'unit': unit,
'value': vpd_pa
}
else:
self.error_not_within_max_age()
else:
self.logger.error("Unknown math type: {type}".format(type=self.math_type))
# Finally, add measurements to influxdb
add_measurements_influxdb(self.unique_id, measurement_dict)
