def __init__(self):
# First, check to see if there is a BME680 on the I2C bus
try:
self.bus.write_byte(0x76, 0)
except IOError:
print('BME680 not found on 0x76, trying 0x77')
else:
self.readfrom = 'bme680primary'
# If we didn't find it on 0x76, look on 0x77
if self.readfrom == 'unset':
try:
self.bus.write_byte(0x77, 0)
except IOError:
print('BME680 not found on 0x77')
else:
self.readfrom = 'bme680secondary'
# If no BME680, is there a Sense HAT?
if self.readfrom == 'unset':
try:
self.bus.write_byte(0x5F, 0)
except:
print('Sense HAT not found')
else:
self.readfrom = 'sense-hat'
print('Using Sense HAT for readings (no gas measurements)')
# Import the sense hat methods
import sense_hat_air_quality
from hts221 import HTS221
self.sense_hat_reading = lambda: sense_hat_air_quality.get_readings(HTS221())
else:
print('Using BME680 for readings')
# Import the BME680 methods
self.sensor = BME680(self.readfrom)
# Next, check if there is a 1-wire temperature sensor (e.g. DS18B20)
if self.readfrom == 'unset':
if os.environ.get('BALENASENSE_1WIRE_SENSOR_ID') != None:
sensor_id = os.environ['BALENASENSE_1WIRE_SENSOR_ID']
else:
sensor_id = None
try:
self.sensor = W1THERM(sensor_id)
except:
print('1-wire sensor not found')
else:
self.readfrom = '1-wire'
print('Using 1-wire for readings (temperature only)')
# If this is still unset, no sensors were found; quit!
if self.readfrom == 'unset':
print('No suitable sensors found! Exiting.')
sys.exit()
def sample(self):
if self.readfrom == 'sense-hat':
return self.apply_offsets(
sense_hat_air_quality.get_readings(self.sensor))
else:
return self.apply_offsets(self.sensor.get_readings(self.sensor))
def __init__(self):
# First, check for enviro plus hat (since it also has BME on 0x76)
try:
self.bus.write_byte(0x23, 0) # test if we can connect to ADS1015
except IOError:
print('Enviro Plus hat not found')
# Fix issue of LTR559 not found
print('SUPSPECT USING CHEAP CHINESE BME680 :)')
else:
try:
self.sensor = ENVIROPLUS()
print('Found Enviro+ Hat')
self.readfrom = 'enviroplus'
except RuntimeError:
# Fix issue of LTR559 not found
print('SUPSPECT USING CHEAP CHINESE BME680 :)')
# Next, check to see if there is a BME680 on the I2C bus
if self.readfrom == 'unset':
try:
self.bus.write_byte(0x76, 0)
except IOError:
print('BME680 not found on 0x76, trying 0x77')
else:
print('BME680 found on 0x76')
self.readfrom = 'bme680primary'
self.sensor = BME680(self.readfrom)
# If we didn't find it on 0x76, look on 0x77
if self.readfrom == 'unset':
try:
self.bus.write_byte(0x77, 0)
except IOError:
print('BME680 not found on 0x77')
else:
print('BME680 found on 0x77')
self.readfrom = 'bme680secondary'
self.sensor = BME680(self.readfrom)
# If no BME680, is there a Sense HAT?
if self.readfrom == 'unset':
try:
self.bus.write_byte(0x5F, 0)
except:
print('Sense HAT not found')
else:
self.readfrom = 'sense-hat'
print('Using Sense HAT for readings (no gas measurements)')
# Import the sense hat methods
import sense_hat_air_quality
from hts221 import HTS221
self.sense_hat_reading = lambda: sense_hat_air_quality.get_readings(
HTS221())
# Next, check if there is a 1-wire temperature sensor (e.g. DS18B20)
if self.readfrom == 'unset':
if os.environ.get('BALENASENSE_1WIRE_SENSOR_ID') != None:
sensor_id = os.environ['BALENASENSE_1WIRE_SENSOR_ID']
else:
sensor_id = None
try:
self.sensor = W1THERM(sensor_id)
except:
print('1-wire sensor not found')
else:
self.readfrom = '1-wire'
print('Using 1-wire for readings (temperature only)')
# If this is still unset, no sensors were found; quit!
if self.readfrom == 'unset':
print('No suitable sensors found! Exiting.')
sys.exit()