.github/workflows/ci.yml

@@ -1,36 +0,0 @@
----
-name: ci
-
-on:
-  push:
-    branches: [master]
-  pull_request:
-    branches: [master]
-  workflow_dispatch:
-  schedule:
-  - cron: '47 4 * * 4'  # weekly on thursday morning
-
-jobs:
-  build:
-    runs-on: ubuntu-22.04
-    strategy:
-      fail-fast: false
-      matrix:
-        python-version:
-        - '3.7'
-        - '3.9'
-        - '3.10'
-        - '3.11'
-    steps:
-    - uses: actions/checkout@v3
-    - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v4
-      with:
-        python-version: ${{ matrix.python-version }}
-    - name: Install dependencies
-      run: |
-        python -m pip install --upgrade setuptools tox
-    - name: Test
-      working-directory: library
-      run: |
-        tox -e py

.gitignore

@@ -19,7 +19,3 @@ library/debian/
 pip-log.txt
 pip-delete-this-directory.txt
 .DS_Store
-.vscode/
-.coverage
-.tox/
-.pytest_cache/

LICENSE

@@ -1,21 +0,0 @@
-MIT License
-
-Copyright (c) 2018 Pimoroni Ltd
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.

Makefile

@@ -1,44 +0,0 @@
-.PHONY: usage install uninstall
-usage:
-	@echo "Usage: make <target>, where target is one of:\n"
-	@echo "install:       install the library locally from source"
-	@echo "uninstall:     uninstall the local library"
-	@echo "python-readme: generate library/README.rst from README.md"
-	@echo "python-wheels: build python .whl files for distribution"
-	@echo "python-sdist:  build python source distribution"
-	@echo "python-clean:  clean python build and dist directories"
-	@echo "python-dist:   build all python distribution files" 
-
-install:
-	./install.sh
-
-uninstall:
-	./uninstall.sh
-
-python-readme: library/README.rst
-
-python-license: library/LICENSE.txt
-
-library/README.rst: README.md
-	pandoc --from=markdown --to=rst -o library/README.rst README.md
-
-library/LICENSE.txt: LICENSE
-	cp LICENSE library/LICENSE.txt
-
-python-wheels: python-readme python-license
-	cd library; python3 setup.py bdist_wheel
-	cd library; python setup.py bdist_wheel
-
-python-sdist: python-readme python-license
-	cd library; python setup.py sdist
-
-python-clean:
-	-rm -r library/dist
-	-rm -r library/build
-	-rm -r library/*.egg-info
-
-python-dist: python-clean python-wheels python-sdist
-	ls library/dist
-
-python-deploy: python-dist
-	twine upload library/dist/*

README.md

@@ -1,20 +1,40 @@
 # BME680
 
-![ci](https://github.com/cmur2/python-bme680/workflows/ci/badge.svg?branch=master)
-
 https://shop.pimoroni.com/products/bme680
 
 The state-of-the-art BME680 breakout lets you measure temperature, pressure, humidity, and indoor air quality.
 
-## About this Fork
+## Installing
 
-In general this fork tries to improve some details of the [original pimoroni/bme680-python repo](https://github.com/pimoroni/bme680-python):
+### Full install (recommended):
 
-- use standard unit for pressure measurement (Pascal instead Hectopascal, user can convert if he likes)
+We've created an easy installation script that will install all pre-requisites and get your BME680
-- floating point precision for measurement compensations (user has all precision available to choose *based on measurement settings and datasheet* how much is trustable)
+up and running with minimal efforts. To run it, fire up Terminal which you'll find in Menu -> Accessories -> Terminal
-- no redundant tweaking of measurement settings after soft reset
+on your Raspberry Pi desktop, as illustrated below:
 
-## Development
+![Finding the terminal](http://get.pimoroni.com/resources/github-repo-terminal.png)
+
+In the new terminal window type the command exactly as it appears below (check for typos) and follow the on-screen instructions:
+
+```bash
+curl https://get.pimoroni.com/bme680 | bash
+```
+
+### Manual install:
+
+#### Library install for Python 3:
+
+```bash
+sudo pip3 install bme680
+```
+
+#### Library install for Python 2:
+
+```bash
+sudo pip2 install bme680
+```
+
+### Development:
 
 If you want to contribute, or like living on the edge of your seat by having the latest code, you should clone this repository, `cd` to the library directory, and run:
 
@@ -27,5 +47,5 @@ In all cases you will have to enable the i2c bus.
 
 ## Documentation & Support
 
-* Guides and tutorials - https://learn.pimoroni.com/bme680-breakout
+* Guides and tutorials - https://learn.pimoroni.com/bme680
 * Get help - http://forums.pimoroni.com/c/support

examples/compensated-temperature.py

@@ -1,57 +0,0 @@
-#!/usr/bin/env python
-
-import time
-import bme680
-from subprocess import PIPE, Popen
-
-
-print("""compensated-temperature.py - Use the CPU temperature to compensate temperature
-readings from the BME680 sensor. Method adapted from Initial State's Enviro pHAT
-review: https://medium.com/@InitialState/tutorial-review-enviro-phat-for-raspberry-pi-4cd6d8c63441
-
-Press Ctrl+C to exit!
-
-""")
-
-try:
-    sensor = bme680.BME680(bme680.I2C_ADDR_PRIMARY)
-except IOError:
-    sensor = bme680.BME680(bme680.I2C_ADDR_SECONDARY)
-
-# These oversampling settings can be tweaked to
-# change the balance between accuracy and noise in
-# the data.
-
-sensor.set_humidity_oversample(bme680.OS_2X)
-sensor.set_pressure_oversample(bme680.OS_4X)
-sensor.set_temperature_oversample(bme680.OS_8X)
-sensor.set_filter(bme680.FILTER_SIZE_3)
-
-
-# Gets the CPU temperature in degrees C
-def get_cpu_temperature():
-    process = Popen(['vcgencmd', 'measure_temp'], stdout=PIPE)
-    output, _error = process.communicate()
-    return float(output[output.index(b'=') + 1:output.rindex(b"'")])
-
-
-factor = 1.0  # Smaller numbers adjust temp down, vice versa
-smooth_size = 10  # Dampens jitter due to rapid CPU temp changes
-
-cpu_temps = []
-
-while True:
-    if sensor.get_sensor_data():
-        cpu_temp = get_cpu_temperature()
-        cpu_temps.append(cpu_temp)
-
-        if len(cpu_temps) > smooth_size:
-            cpu_temps = cpu_temps[1:]
-
-        smoothed_cpu_temp = sum(cpu_temps) / float(len(cpu_temps))
-        raw_temp = sensor.data.temperature
-        comp_temp = raw_temp - ((smoothed_cpu_temp - raw_temp) / factor)
-
-        print("Compensated temperature: {:05.2f} *C".format(comp_temp))
-
-        time.sleep(1.0)

examples/indoor-air-quality.py

@@ -3,22 +3,19 @@
 import bme680
 import time
 
-print("""indoor-air-quality.py - Estimates indoor air quality.
+print("""Estimate indoor air quality
 
-Runs the sensor for a burn-in period, then uses a
+Runs the sensor for a burn-in period, then uses a 
 combination of relative humidity and gas resistance
 to estimate indoor air quality as a percentage.
 
-Press Ctrl+C to exit!
+Press Ctrl+C to exit
 
 """)
 
-try:
+sensor = bme680.BME680()
-    sensor = bme680.BME680(bme680.I2C_ADDR_PRIMARY)
-except IOError:
-    sensor = bme680.BME680(bme680.I2C_ADDR_SECONDARY)
 
-# These oversampling settings can be tweaked to
+# These oversampling settings can be tweaked to 
 # change the balance between accuracy and noise in
 # the data.
 
@@ -32,7 +29,7 @@ sensor.set_gas_heater_temperature(320)
 sensor.set_gas_heater_duration(150)
 sensor.select_gas_heater_profile(0)
 
-# start_time and curr_time ensure that the
+# start_time and curr_time ensure that the 
 # burn_in_time (in seconds) is kept track of.
 
 start_time = time.time()
@@ -45,13 +42,13 @@ try:
     # Collect gas resistance burn-in values, then use the average
     # of the last 50 values to set the upper limit for calculating
     # gas_baseline.
-    print('Collecting gas resistance burn-in data for 5 mins\n')
+    print("Collecting gas resistance burn-in data for 5 mins\n")
     while curr_time - start_time < burn_in_time:
         curr_time = time.time()
         if sensor.get_sensor_data() and sensor.data.heat_stable:
             gas = sensor.data.gas_resistance
             burn_in_data.append(gas)
-            print('Gas: {0} Ohms'.format(gas))
+            print("Gas: {0} Ohms".format(gas))
             time.sleep(1)
 
     gas_baseline = sum(burn_in_data[-50:]) / 50.0
@@ -59,13 +56,11 @@ try:
     # Set the humidity baseline to 40%, an optimal indoor humidity.
     hum_baseline = 40.0
 
-    # This sets the balance between humidity and gas reading in the
+    # This sets the balance between humidity and gas reading in the 
     # calculation of air_quality_score (25:75, humidity:gas)
     hum_weighting = 0.25
 
-    print('Gas baseline: {0} Ohms, humidity baseline: {1:.2f} %RH\n'.format(
+    print("Gas baseline: {0} Ohms, humidity baseline: {1:.2f} %RH\n".format(gas_baseline, hum_baseline))
-        gas_baseline,
-        hum_baseline))
 
     while True:
         if sensor.get_sensor_data() and sensor.data.heat_stable:
@@ -77,31 +72,22 @@ try:
 
             # Calculate hum_score as the distance from the hum_baseline.
             if hum_offset > 0:
-                hum_score = (100 - hum_baseline - hum_offset)
+                hum_score = (100 - hum_baseline - hum_offset) / (100 - hum_baseline) * (hum_weighting * 100)
-                hum_score /= (100 - hum_baseline)
-                hum_score *= (hum_weighting * 100)
 
             else:
-                hum_score = (hum_baseline + hum_offset)
+                hum_score = (hum_baseline + hum_offset) / hum_baseline * (hum_weighting * 100)
-                hum_score /= hum_baseline
-                hum_score *= (hum_weighting * 100)
 
             # Calculate gas_score as the distance from the gas_baseline.
             if gas_offset > 0:
-                gas_score = (gas / gas_baseline)
+                gas_score = (gas / gas_baseline) * (100 - (hum_weighting * 100))
-                gas_score *= (100 - (hum_weighting * 100))
 
             else:
                 gas_score = 100 - (hum_weighting * 100)
 
-            # Calculate air_quality_score.
+            # Calculate air_quality_score. 
             air_quality_score = hum_score + gas_score
 
-            print('Gas: {0:.2f} Ohms,humidity: {1:.2f} %RH,air quality: {2:.2f}'.format(
+            print("Gas: {0:.2f} Ohms,humidity: {1:.2f} %RH,air quality: {2:.2f}".format(gas, hum, air_quality_score))
-                gas,
-                hum,
-                air_quality_score))
-
             time.sleep(1)
 
 except KeyboardInterrupt:

examples/read-all.py

@@ -3,30 +3,21 @@
 import bme680
 import time
 
-print("""read-all.py - Displays temperature, pressure, humidity, and gas.
+sensor = bme680.BME680()
-
-Press Ctrl+C to exit!
-
-""")
-
-try:
-    sensor = bme680.BME680(bme680.I2C_ADDR_PRIMARY)
-except IOError:
-    sensor = bme680.BME680(bme680.I2C_ADDR_SECONDARY)
 
 # These calibration data can safely be commented
 # out, if desired.
 
-print('Calibration data:')
+print("Calibration data:")
 for name in dir(sensor.calibration_data):
 
     if not name.startswith('_'):
         value = getattr(sensor.calibration_data, name)
 
         if isinstance(value, int):
-            print('{}: {}'.format(name, value))
+            print("{}: {}".format(name, value))
 
-# These oversampling settings can be tweaked to
+# These oversampling settings can be tweaked to 
 # change the balance between accuracy and noise in
 # the data.
 
@@ -36,12 +27,12 @@ sensor.set_temperature_oversample(bme680.OS_8X)
 sensor.set_filter(bme680.FILTER_SIZE_3)
 sensor.set_gas_status(bme680.ENABLE_GAS_MEAS)
 
-print('\n\nInitial reading:')
+print("\n\nInitial reading:")
 for name in dir(sensor.data):
     value = getattr(sensor.data, name)
 
     if not name.startswith('_'):
-        print('{}: {}'.format(name, value))
+        print("{}: {}".format(name, value))
 
 sensor.set_gas_heater_temperature(320)
 sensor.set_gas_heater_duration(150)
@@ -52,19 +43,14 @@ sensor.select_gas_heater_profile(0)
 # sensor.set_gas_heater_profile(200, 150, nb_profile=1)
 # sensor.select_gas_heater_profile(1)
 
-print('\n\nPolling:')
+print("\n\nPolling:")
 try:
     while True:
         if sensor.get_sensor_data():
-            output = '{0:.2f} C,{1:.2f} hPa,{2:.2f} %RH'.format(
+            output = "{0:.2f} C,{1:.2f} hPa,{2:.2f} %RH".format(sensor.data.temperature, sensor.data.pressure, sensor.data.humidity)
-                sensor.data.temperature,
-                sensor.data.pressure / 100.0,
-                sensor.data.humidity)
 
             if sensor.data.heat_stable:
-                print('{0},{1} Ohms'.format(
+                print("{0},{1} Ohms".format(output, sensor.data.gas_resistance))
-                    output,
-                    sensor.data.gas_resistance))
 
             else:
                 print(output)

examples/setup.cfg

@@ -1,8 +0,0 @@
-[flake8]
-ignore =
-	E501  # line too long
-	F403
-	F405
-# Don't require docstrings in example code
-    D100  # Missing docstring in public module
-    D103  # Missing docstring in public function

examples/temp-press-hum.py

@@ -1,8 +1,8 @@
 #!/usr/bin/env python
-
 import bme680
+import time
 
-print("""temperature-pressure-humidity.py - Displays temperature, pressure, and humidity.
+print("""Display Temperature, Pressure and Humidity
 
 If you don't need gas readings, then you can read temperature,
 pressure and humidity quickly.
@@ -11,10 +11,7 @@ Press Ctrl+C to exit
 
 """)
 
-try:
+sensor = bme680.BME680()
-    sensor = bme680.BME680(bme680.I2C_ADDR_PRIMARY)
-except IOError:
-    sensor = bme680.BME680(bme680.I2C_ADDR_SECONDARY)
 
 # These oversampling settings can be tweaked to
 # change the balance between accuracy and noise in
@@ -25,15 +22,15 @@ sensor.set_pressure_oversample(bme680.OS_4X)
 sensor.set_temperature_oversample(bme680.OS_8X)
 sensor.set_filter(bme680.FILTER_SIZE_3)
 
-print('Polling:')
+print("Polling:")
 try:
     while True:
         if sensor.get_sensor_data():
-            output = '{0:.2f} C,{1:.2f} hPa,{2:.3f} %RH'.format(
+
-                sensor.data.temperature,
+            output = "{0:.2f} C,{1:.2f} hPa,{2:.3f} %RH".format(sensor.data.temperature, sensor.data.pressure, sensor.data.humidity)
-                sensor.data.pressure / 100.0,
+
-                sensor.data.humidity)
             print(output)
 
 except KeyboardInterrupt:
     pass
+

examples/temperature-offset.py

@@ -1,50 +0,0 @@
-#!/usr/bin/env python
-
-import bme680
-
-print("""temperature-offset.py - Displays temperature, pressure, and humidity with different offsets.
-
-Press Ctrl+C to exit!
-
-""")
-
-try:
-    sensor = bme680.BME680(bme680.I2C_ADDR_PRIMARY)
-except IOError:
-    sensor = bme680.BME680(bme680.I2C_ADDR_SECONDARY)
-
-# These oversampling settings can be tweaked to
-# change the balance between accuracy and noise in
-# the data.
-
-sensor.set_humidity_oversample(bme680.OS_2X)
-sensor.set_pressure_oversample(bme680.OS_4X)
-sensor.set_temperature_oversample(bme680.OS_8X)
-sensor.set_filter(bme680.FILTER_SIZE_3)
-
-
-def display_data(offset=0):
-    sensor.set_temp_offset(offset)
-    sensor.get_sensor_data()
-    output = '{0:.2f} C, {1:.2f} hPa, {2:.3f} %RH'.format(
-        sensor.data.temperature,
-        sensor.data.pressure / 100.0,
-        sensor.data.humidity)
-    print(output)
-    print('')
-
-
-print('Initial readings')
-display_data()
-
-print('SET offset 4 degrees celsius')
-display_data(4)
-
-print('SET offset -1.87 degrees celsius')
-display_data(-1.87)
-
-print('SET offset -100 degrees celsius')
-display_data(-100)
-
-print('SET offset 0 degrees celsius')
-display_data(0)

install.sh

@@ -1,22 +0,0 @@
-#!/bin/bash
-
-printf "BME680 Python Library: Installer\n\n"
-
-if [ $(id -u) -ne 0 ]; then
-	printf "Script must be run as root. Try 'sudo ./install.sh'\n"
-	exit 1
-fi
-
-cd library
-
-printf "Installing for Python 2..\n"
-python setup.py install
-
-if [ -f "/usr/bin/python3" ]; then
-	printf "Installing for Python 3..\n"
-	python3 setup.py install
-fi
-
-cd ..
-
-printf "Done!\n"

library/.coveragerc

@@ -1,4 +0,0 @@
-[run]
-source = bme680
-omit =
-    .tox/*

library/CHANGELOG.txt

@@ -1,8 +1,3 @@
-1.0.5
------
-
-* New: set_temp_offset to calibrate temperature offset in degrees C
-
 1.0.4
 -----
 

library/LICENSE.txt

@@ -1,21 +0,0 @@
-MIT License
-
-Copyright (c) 2018 Pimoroni Ltd
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.

library/MANIFEST.in

@@ -1,5 +1,5 @@
 include CHANGELOG.txt
 include LICENSE.txt
-include README.rst
+include README.txt
 include setup.py
-recursive-include bme680 *.py
+include bme680.py

library/README.rst

@@ -1,80 +0,0 @@
-BME680
-======
-
-|Build Status| |Coverage Status| |PyPi Package| |Python Versions|
-
-https://shop.pimoroni.com/products/bme680
-
-The state-of-the-art BME680 breakout lets you measure temperature,
-pressure, humidity, and indoor air quality.
-
-Installing
-----------
-
-Full install (recommended):
-~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-We've created an easy installation script that will install all
-pre-requisites and get your BME680 up and running with minimal efforts.
-To run it, fire up Terminal which you'll find in Menu -> Accessories ->
-Terminal on your Raspberry Pi desktop, as illustrated below:
-
-.. figure:: http://get.pimoroni.com/resources/github-repo-terminal.png
-   :alt: Finding the terminal
-
-   Finding the terminal
-
-In the new terminal window type the command exactly as it appears below
-(check for typos) and follow the on-screen instructions:
-
-.. code:: bash
-
-    curl https://get.pimoroni.com/bme680 | bash
-
-Manual install:
-~~~~~~~~~~~~~~~
-
-Library install for Python 3:
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-
-.. code:: bash
-
-    sudo pip3 install bme680
-
-Library install for Python 2:
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-
-.. code:: bash
-
-    sudo pip2 install bme680
-
-Development:
-~~~~~~~~~~~~
-
-If you want to contribute, or like living on the edge of your seat by
-having the latest code, you should clone this repository, ``cd`` to the
-library directory, and run:
-
-.. code:: bash
-
-    sudo python3 setup.py install
-
-(or ``sudo python setup.py install`` whichever your primary Python
-environment may be)
-
-In all cases you will have to enable the i2c bus.
-
-Documentation & Support
------------------------
-
--  Guides and tutorials - https://learn.pimoroni.com/bme680
--  Get help - http://forums.pimoroni.com/c/support
-
-.. |Build Status| image:: https://travis-ci.org/pimoroni/bme680-python.svg?branch=master
-   :target: https://travis-ci.org/pimoroni/bme680-python
-.. |Coverage Status| image:: https://coveralls.io/repos/github/pimoroni/bme680-python/badge.svg?branch=master
-   :target: https://coveralls.io/github/pimoroni/bme680-python?branch=master
-.. |PyPi Package| image:: https://img.shields.io/pypi/v/bme680.svg
-   :target: https://pypi.python.org/pypi/bme680
-.. |Python Versions| image:: https://img.shields.io/pypi/pyversions/bme680.svg
-   :target: https://pypi.python.org/pypi/bme680

library/bme680/__init__.py

@@ -1,24 +1,11 @@
-"""BME680 Temperature, Pressure, Humidity & Gas Sensor."""
+from .constants import *
-from .constants import lookupTable1, lookupTable2
-from .constants import BME680Data
-from . import constants
 import math
 import time
 
-__version__ = '1.0.5'
+__version__ = '1.0.4'
-
-
-# Export constants to global namespace
-# so end-users can "from BME680 import NAME"
-if hasattr(constants, '__dict__'):
-    for key in constants.__dict__:
-        value = constants.__dict__[key]
-        if key not in globals():
-            globals()[key] = value
-
 
 class BME680(BME680Data):
-    """BOSCH BME680.
+    """BOSCH BME680
 
     Gas, pressure, temperature and humidity sensor.
 
@@ -26,14 +13,7 @@ class BME680(BME680Data):
     :param i2c_device: Optional smbus or compatible instance for facilitating i2c communications.
 
     """
-
+    def __init__(self, i2c_addr=I2C_ADDR_PRIMARY, i2c_device=None):
-    def __init__(self, i2c_addr=constants.I2C_ADDR_PRIMARY, i2c_device=None):
-        """Initialise BME680 sensor instance and verify device presence.
-
-        :param i2c_addr: i2c address of BME680
-        :param i2c_device: Optional SMBus-compatible instance for i2c transport
-
-        """
         BME680Data.__init__(self)
 
         self.i2c_addr = i2c_addr
@@ -42,50 +22,43 @@ class BME680(BME680Data):
             import smbus
             self._i2c = smbus.SMBus(1)
 
-        self.chip_id = self._get_regs(constants.CHIP_ID_ADDR, 1)
+        self.chip_id = self._get_regs(CHIP_ID_ADDR, 1)
-        if self.chip_id != constants.CHIP_ID:
+        if self.chip_id != CHIP_ID:
-            raise RuntimeError('BME680 Not Found. Invalid CHIP ID: 0x{0:02x}'.format(self.chip_id))
+            raise RuntimeError("BME680 Not Found. Invalid CHIP ID: 0x{0:02x}".format(self.chip_id))
 
         self.soft_reset()
-        self.set_power_mode(constants.SLEEP_MODE)
+        self.set_power_mode(SLEEP_MODE)
 
         self._get_calibration_data()
 
-        self.set_temp_offset(0)
+        self.set_humidity_oversample(OS_2X)
-        self.ambient_temperature = 25 # only for gas heater temperature, nearly irrelevant
+        self.set_pressure_oversample(OS_4X)
+        self.set_temperature_oversample(OS_8X)
+        self.set_filter(FILTER_SIZE_3)
+        self.set_gas_status(ENABLE_GAS_MEAS)
+
+        self.get_sensor_data()
 
     def _get_calibration_data(self):
-        """Retrieve the sensor calibration data and store it in .calibration_data."""
+        """Retrieves the sensor calibration data and stores it in .calibration_data"""
-        calibration = self._get_regs(constants.COEFF_ADDR1, constants.COEFF_ADDR1_LEN)
+        calibration = self._get_regs(COEFF_ADDR1, COEFF_ADDR1_LEN)
-        calibration += self._get_regs(constants.COEFF_ADDR2, constants.COEFF_ADDR2_LEN)
+        calibration += self._get_regs(COEFF_ADDR2, COEFF_ADDR2_LEN)
 
-        heat_range = self._get_regs(constants.ADDR_RES_HEAT_RANGE_ADDR, 1)
+        heat_range = self._get_regs(ADDR_RES_HEAT_RANGE_ADDR, 1)
-        heat_value = constants.twos_comp(self._get_regs(constants.ADDR_RES_HEAT_VAL_ADDR, 1), bits=8)
+        heat_value = twos_comp(self._get_regs(ADDR_RES_HEAT_VAL_ADDR, 1), bits=8)
-        sw_error = constants.twos_comp(self._get_regs(constants.ADDR_RANGE_SW_ERR_ADDR, 1), bits=8)
+        sw_error = twos_comp(self._get_regs(ADDR_RANGE_SW_ERR_ADDR, 1), bits=8)
 
         self.calibration_data.set_from_array(calibration)
         self.calibration_data.set_other(heat_range, heat_value, sw_error)
 
     def soft_reset(self):
-        """Trigger a soft reset."""
+        """Initiate a soft reset"""
-        self._set_regs(constants.SOFT_RESET_ADDR, constants.SOFT_RESET_CMD)
+        self._set_regs(SOFT_RESET_ADDR, SOFT_RESET_CMD) 
-        time.sleep(constants.RESET_PERIOD / 1000.0)
+        time.sleep(RESET_PERIOD / 1000.0)
-
-    def set_temp_offset(self, value):
-        """Set temperature offset in celsius.
-
-        If set, the temperature t_fine will be increased by given value in celsius.
-        :param value: Temperature offset in Celsius, eg. 4, -8, 1.25
-
-        """
-        if value == 0:
-            self.offset_temp_in_t_fine = 0
-        else:
-            self.offset_temp_in_t_fine = int(math.copysign((((int(abs(value) * 100)) << 8) - 128) / 5, value))
 
     def set_humidity_oversample(self, value):
-        """Set humidity oversampling.
+        """Set humidity oversampling
-
+        
         A higher oversampling value means more stable sensor readings,
         with less noise and jitter.
 
@@ -96,15 +69,15 @@ class BME680(BME680Data):
 
         """
         self.tph_settings.os_hum = value
-        self._set_bits(constants.CONF_OS_H_ADDR, constants.OSH_MSK, constants.OSH_POS, value)
+        self._set_bits(CONF_OS_H_ADDR, OSH_MSK, OSH_POS, value)
 
     def get_humidity_oversample(self):
-        """Get humidity oversampling."""
+        """Get humidity oversampling"""
-        return (self._get_regs(constants.CONF_OS_H_ADDR, 1) & constants.OSH_MSK) >> constants.OSH_POS
+        return (self._get_regs(CONF_OS_H_ADDR, 1) & OSH_MSK) >> OSH_POS
 
     def set_pressure_oversample(self, value):
-        """Set temperature oversampling.
+        """Set temperature oversampling
-
+        
         A higher oversampling value means more stable sensor readings,
         with less noise and jitter.
 
@@ -112,18 +85,18 @@ class BME680(BME680Data):
         causing a slower response time to fast transients.
 
         :param value: Oversampling value, one of: OS_NONE, OS_1X, OS_2X, OS_4X, OS_8X, OS_16X
-
+        
         """
         self.tph_settings.os_pres = value
-        self._set_bits(constants.CONF_T_P_MODE_ADDR, constants.OSP_MSK, constants.OSP_POS, value)
+        self._set_bits(CONF_T_P_MODE_ADDR, OSP_MSK, OSP_POS, value)
 
     def get_pressure_oversample(self):
-        """Get pressure oversampling."""
+        """Get pressure oversampling"""
-        return (self._get_regs(constants.CONF_T_P_MODE_ADDR, 1) & constants.OSP_MSK) >> constants.OSP_POS
+        return (self._get_regs(CONF_T_P_MODE_ADDR, 1) & OSP_MSK) >> OSP_POS
 
     def set_temperature_oversample(self, value):
-        """Set pressure oversampling.
+        """Set pressure oversampling
-
+        
         A higher oversampling value means more stable sensor readings,
         with less noise and jitter.
 
@@ -131,18 +104,18 @@ class BME680(BME680Data):
         causing a slower response time to fast transients.
 
         :param value: Oversampling value, one of: OS_NONE, OS_1X, OS_2X, OS_4X, OS_8X, OS_16X
-
+        
         """
         self.tph_settings.os_temp = value
-        self._set_bits(constants.CONF_T_P_MODE_ADDR, constants.OST_MSK, constants.OST_POS, value)
+        self._set_bits(CONF_T_P_MODE_ADDR, OST_MSK, OST_POS, value)
 
     def get_temperature_oversample(self):
-        """Get temperature oversampling."""
+        """Get temperature oversampling"""
-        return (self._get_regs(constants.CONF_T_P_MODE_ADDR, 1) & constants.OST_MSK) >> constants.OST_POS
+        return (self._get_regs(CONF_T_P_MODE_ADDR, 1) & OST_MSK) >> OST_POS
 
     def set_filter(self, value):
-        """Set IIR filter size.
+        """Set IIR filter size
-
+        
         Optionally remove short term fluctuations from the temperature and pressure readings,
         increasing their resolution but reducing their bandwidth.
 
@@ -154,42 +127,40 @@ class BME680(BME680Data):
 
         """
         self.tph_settings.filter = value
-        self._set_bits(constants.CONF_ODR_FILT_ADDR, constants.FILTER_MSK, constants.FILTER_POS, value)
+        self._set_bits(CONF_ODR_FILT_ADDR, FILTER_MSK, FILTER_POS, value)
 
     def get_filter(self):
-        """Get filter size."""
+        """Get filter size"""
-        return (self._get_regs(constants.CONF_ODR_FILT_ADDR, 1) & constants.FILTER_MSK) >> constants.FILTER_POS
+        return (self._get_regs(CONF_ODR_FILT_ADDR, 1) & FILTER_MSK) >> FILTER_POS
 
     def select_gas_heater_profile(self, value):
-        """Set current gas sensor conversion profile.
+        """Set current gas sensor conversion profile: 0 to 9
-
+        
         Select one of the 10 configured heating durations/set points.
-
+        
-        :param value: Profile index from 0 to 9
-
         """
-        if value > constants.NBCONV_MAX or value < constants.NBCONV_MIN:
+        if value > NBCONV_MAX or value < NBCONV_MIN:
-            raise ValueError("Profile '{}' should be between {} and {}".format(value, constants.NBCONV_MIN, constants.NBCONV_MAX))
+            raise ValueError("Profile '{}' should be between {} and {}".format(value, NBCONV_MIN, NBCONV_MAX))
 
         self.gas_settings.nb_conv = value
-        self._set_bits(constants.CONF_ODR_RUN_GAS_NBC_ADDR, constants.NBCONV_MSK, constants.NBCONV_POS, value)
+        self._set_bits(CONF_ODR_RUN_GAS_NBC_ADDR, NBCONV_MSK, NBCONV_POS, value)
 
     def get_gas_heater_profile(self):
-        """Get gas sensor conversion profile: 0 to 9."""
+        """Get gas sensor conversion profile: 0 to 9"""
-        return self._get_regs(constants.CONF_ODR_RUN_GAS_NBC_ADDR, 1) & constants.NBCONV_MSK
+        return self._get_regs(CONF_ODR_RUN_GAS_NBC_ADDR, 1) & NBCONV_MSK
 
     def set_gas_status(self, value):
-        """Enable/disable gas sensor."""
+        """Enable/disable gas sensor"""
         self.gas_settings.run_gas = value
-        self._set_bits(constants.CONF_ODR_RUN_GAS_NBC_ADDR, constants.RUN_GAS_MSK, constants.RUN_GAS_POS, value)
+        self._set_bits(CONF_ODR_RUN_GAS_NBC_ADDR, RUN_GAS_MSK, RUN_GAS_POS, value)
 
     def get_gas_status(self):
-        """Get the current gas status."""
+        """Get the current gas status"""
-        return (self._get_regs(constants.CONF_ODR_RUN_GAS_NBC_ADDR, 1) & constants.RUN_GAS_MSK) >> constants.RUN_GAS_POS
+        return (self._get_regs(CONF_ODR_RUN_GAS_NBC_ADDR, 1) & RUN_GAS_MSK) >> RUN_GAS_POS
 
     def set_gas_heater_profile(self, temperature, duration, nb_profile=0):
-        """Set temperature and duration of gas sensor heater.
+        """Set temperature and duration of gas sensor heater
-
+        
         :param temperature: Target temperature in degrees celsius, between 200 and 400
         :param durarion: Target duration in milliseconds, between 1 and 4032
         :param nb_profile: Target profile, between 0 and 9
@@ -199,23 +170,23 @@ class BME680(BME680Data):
         self.set_gas_heater_duration(duration, nb_profile=nb_profile)
 
     def set_gas_heater_temperature(self, value, nb_profile=0):
-        """Set gas sensor heater temperature.
+        """Set gas sensor heater temperature
 
         :param value: Target temperature in degrees celsius, between 200 and 400
-
+        
         When setting an nb_profile other than 0,
         make sure to select it with select_gas_heater_profile.
 
         """
-        if nb_profile > constants.NBCONV_MAX or value < constants.NBCONV_MIN:
+        if nb_profile > NBCONV_MAX or value < NBCONV_MIN:
-            raise ValueError('Profile "{}" should be between {} and {}'.format(nb_profile, constants.NBCONV_MIN, constants.NBCONV_MAX))
+            raise ValueError("Profile '{}' should be between {} and {}".format(nb_profile, NBCONV_MIN, NBCONV_MAX))
 
         self.gas_settings.heatr_temp = value
         temp = int(self._calc_heater_resistance(self.gas_settings.heatr_temp))
-        self._set_regs(constants.RES_HEAT0_ADDR + nb_profile, temp)
+        self._set_regs(RES_HEAT0_ADDR + nb_profile, temp)
 
     def set_gas_heater_duration(self, value, nb_profile=0):
-        """Set gas sensor heater duration.
+        """Set gas sensor heater duration
 
         Heating durations between 1 ms and 4032 ms can be configured.
         Approximately 20-30 ms are necessary for the heater to reach the intended target temperature.
@@ -224,70 +195,70 @@ class BME680(BME680Data):
 
         When setting an nb_profile other than 0,
         make sure to select it with select_gas_heater_profile.
-
+        
         """
-        if nb_profile > constants.NBCONV_MAX or value < constants.NBCONV_MIN:
+        if nb_profile > NBCONV_MAX or value < NBCONV_MIN:
-            raise ValueError('Profile "{}" should be between {} and {}'.format(nb_profile, constants.NBCONV_MIN, constants.NBCONV_MAX))
+            raise ValueError("Profile '{}' should be between {} and {}".format(nb_profile, NBCONV_MIN, NBCONV_MAX))
 
         self.gas_settings.heatr_dur = value
         temp = self._calc_heater_duration(self.gas_settings.heatr_dur)
-        self._set_regs(constants.GAS_WAIT0_ADDR + nb_profile, temp)
+        self._set_regs(GAS_WAIT0_ADDR + nb_profile, temp)
 
     def set_power_mode(self, value, blocking=True):
-        """Set power mode."""
+        """Set power mode"""
-        if value not in (constants.SLEEP_MODE, constants.FORCED_MODE):
+        if value not in (SLEEP_MODE, FORCED_MODE):
-            raise ValueError('Power mode should be one of SLEEP_MODE or FORCED_MODE')
+            print("Power mode should be one of SLEEP_MODE or FORCED_MODE")
 
         self.power_mode = value
 
-        self._set_bits(constants.CONF_T_P_MODE_ADDR, constants.MODE_MSK, constants.MODE_POS, value)
+        self._set_bits(CONF_T_P_MODE_ADDR, MODE_MSK, MODE_POS, value)
 
         while blocking and self.get_power_mode() != self.power_mode:
-            time.sleep(constants.POLL_PERIOD_MS / 1000.0)
+            time.sleep(POLL_PERIOD_MS / 1000.0)
 
     def get_power_mode(self):
-        """Get power mode."""
+        """Get power mode"""
-        self.power_mode = self._get_regs(constants.CONF_T_P_MODE_ADDR, 1)
+        self.power_mode = self._get_regs(CONF_T_P_MODE_ADDR, 1)
         return self.power_mode
 
     def get_sensor_data(self):
         """Get sensor data.
-
+        
         Stores data in .data and returns True upon success.
 
         """
-        self.set_power_mode(constants.FORCED_MODE)
+        self.set_power_mode(FORCED_MODE)
 
         for attempt in range(10):
-            status = self._get_regs(constants.FIELD0_ADDR, 1)
+            status = self._get_regs(FIELD0_ADDR, 1)
 
-            if (status & constants.NEW_DATA_MSK) == 0:
+            if (status & NEW_DATA_MSK) == 0:
-                time.sleep(constants.POLL_PERIOD_MS / 1000.0)
+                time.sleep(POLL_PERIOD_MS / 1000.0)
                 continue
 
-            regs = self._get_regs(constants.FIELD0_ADDR, constants.FIELD_LENGTH)
+            regs = self._get_regs(FIELD0_ADDR, FIELD_LENGTH)
 
-            self.data.status = regs[0] & constants.NEW_DATA_MSK
+            self.data.status = regs[0] & NEW_DATA_MSK
             # Contains the nb_profile used to obtain the current measurement
-            self.data.gas_index = regs[0] & constants.GAS_INDEX_MSK
+            self.data.gas_index = regs[0] & GAS_INDEX_MSK
             self.data.meas_index = regs[1]
 
             adc_pres = (regs[2] << 12) | (regs[3] << 4) | (regs[4] >> 4)
             adc_temp = (regs[5] << 12) | (regs[6] << 4) | (regs[7] >> 4)
             adc_hum = (regs[8] << 8) | regs[9]
             adc_gas_res = (regs[13] << 2) | (regs[14] >> 6)
-            gas_range = regs[14] & constants.GAS_RANGE_MSK
+            gas_range = regs[14] & GAS_RANGE_MSK
 
-            self.data.status |= regs[14] & constants.GASM_VALID_MSK
+            self.data.status |= regs[14] & GASM_VALID_MSK
-            self.data.status |= regs[14] & constants.HEAT_STAB_MSK
+            self.data.status |= regs[14] & HEAT_STAB_MSK
 
-            self.data.heat_stable = (self.data.status & constants.HEAT_STAB_MSK) > 0
+            self.data.heat_stable = (self.data.status & HEAT_STAB_MSK) > 0
 
             temperature = self._calc_temperature(adc_temp)
             self.data.temperature = temperature / 100.0
-            self.ambient_temperature = temperature  # Saved for heater calc
+            self.ambient_temperature = temperature # Saved for heater calc
 
-            self.data.pressure = self._calc_pressure(adc_pres)
+            self.data.pressure = self._calc_pressure(adc_pres) / 100.0
             self.data.humidity = self._calc_humidity(adc_hum) / 1000.0
             self.data.gas_resistance = self._calc_gas_resistance(adc_gas_res, gas_range)
             return True
@@ -295,106 +266,101 @@ class BME680(BME680Data):
         return False
 
     def _set_bits(self, register, mask, position, value):
-        """Mask out and set one or more bits in a register."""
+        """Mask out and set one or more bits in a register"""
         temp = self._get_regs(register, 1)
         temp &= ~mask
         temp |= value << position
         self._set_regs(register, temp)
 
     def _set_regs(self, register, value):
-        """Set one or more registers."""
+        """Set one or more registers"""
         if isinstance(value, int):
             self._i2c.write_byte_data(self.i2c_addr, register, value)
         else:
             self._i2c.write_i2c_block_data(self.i2c_addr, register, value)
 
     def _get_regs(self, register, length):
-        """Get one or more registers."""
+        """Get one or more registers"""
         if length == 1:
             return self._i2c.read_byte_data(self.i2c_addr, register)
         else:
             return self._i2c.read_i2c_block_data(self.i2c_addr, register, length)
-
+        
     def _calc_temperature(self, temperature_adc):
-        """Convert the raw temperature to degrees C using calibration_data."""
+        var1 = (temperature_adc >> 3) - (self.calibration_data.par_t1 << 1)
-        var1 = (temperature_adc / 8.0) - (self.calibration_data.par_t1 * 2.0)
+        var2 = (var1 * self.calibration_data.par_t2) >> 11
-        var2 = (var1 * self.calibration_data.par_t2) / 2048.0
+        var3 = ((var1 >> 1) * (var1 >> 1)) >> 12
-        var3 = ((var1 / 2.0) * (var1 / 2.0)) / 4096.0
+        var3 = ((var3) * (self.calibration_data.par_t3 << 4)) >> 14
-        var3 = ((var3) * (self.calibration_data.par_t3 * 16.0)) / 16384.0
 
         # Save teperature data for pressure calculations
-        self.calibration_data.t_fine = (var2 + var3) + self.offset_temp_in_t_fine
+        self.calibration_data.t_fine = (var2 + var3)
-        calc_temp = (((self.calibration_data.t_fine * 5.0) + 128.0) / 256.0)
+        calc_temp = (((self.calibration_data.t_fine * 5) + 128) >> 8)
 
         return calc_temp
 
     def _calc_pressure(self, pressure_adc):
-        """Convert the raw pressure using calibration data."""
+        var1 = ((self.calibration_data.t_fine) >> 1) - 64000
-        var1 = (self.calibration_data.t_fine / 2.0) - 64000.0
+        var2 = ((((var1 >> 2) * (var1 >> 2)) >> 11) *
-        var2 = ((((var1 / 4.0) * (var1 / 4.0)) / 2048.0) *
+            self.calibration_data.par_p6) >> 2
-                self.calibration_data.par_p6) / 4.0
+        var2 = var2 + ((var1 * self.calibration_data.par_p5) << 1)
-        var2 = var2 + ((var1 * self.calibration_data.par_p5) * 2.0)
+        var2 = (var2 >> 2) + (self.calibration_data.par_p4 << 16)
-        var2 = (var2 / 4.0) + (self.calibration_data.par_p4 * 65536.0)
+        var1 = (((((var1 >> 2) * (var1 >> 2)) >> 13 ) *
-        var1 = (((((var1 / 4.0) * (var1 / 4.0)) / 8192.0) *
+                ((self.calibration_data.par_p3 << 5)) >> 3) +
-                ((self.calibration_data.par_p3 * 32.0)) / 8.0) +
+                ((self.calibration_data.par_p2 * var1) >> 1))
-                ((self.calibration_data.par_p2 * var1) / 2.0))
+        var1 = var1 >> 18
-        var1 = var1 / 262144.0
 
-        var1 = ((32768.0 + var1) * self.calibration_data.par_p1) / 32768.0
+        var1 = ((32768 + var1) * self.calibration_data.par_p1) >> 15
-        calc_pressure = 1048576.0 - pressure_adc
+        calc_pressure = 1048576 - pressure_adc
-        calc_pressure = ((calc_pressure - (var2 / 4096.0)) * (3125.0))
+        calc_pressure = ((calc_pressure - (var2 >> 12)) * (3125))
 
         if calc_pressure >= (1 << 31):
-            calc_pressure = ((calc_pressure / var1) * 2.0)
+            calc_pressure = ((calc_pressure // var1) << 1)
         else:
-            calc_pressure = ((calc_pressure * 2.0) / var1)
+            calc_pressure = ((calc_pressure << 1) // var1)
 
-        var1 = (self.calibration_data.par_p9 * (((calc_pressure / 8.0) *
+        var1 = (self.calibration_data.par_p9 * (((calc_pressure >> 3) *
-                (calc_pressure / 8.0)) / 8192.0)) / 4096.0
+            (calc_pressure >> 3)) >> 13)) >> 12
-        var2 = ((calc_pressure / 4.0) *
+        var2 = ((calc_pressure >> 2) *
-                self.calibration_data.par_p8) / 8192.0
+            self.calibration_data.par_p8) >> 13
-        var3 = ((calc_pressure / 256.0) * (calc_pressure / 256.0) *
+        var3 = ((calc_pressure >> 8) * (calc_pressure >> 8) *
-                (calc_pressure / 256.0) *
+            (calc_pressure >> 8) *
-                self.calibration_data.par_p10) / 131072.0
+            self.calibration_data.par_p10) >> 17
 
         calc_pressure = (calc_pressure) + ((var1 + var2 + var3 +
-                                           (self.calibration_data.par_p7 * 128.0)) / 16.0)
+            (self.calibration_data.par_p7 << 7)) >> 4)
 
         return calc_pressure
 
     def _calc_humidity(self, humidity_adc):
-        """Convert the raw humidity using calibration data."""
+        temp_scaled = ((self.calibration_data.t_fine * 5) + 128) >> 8
-        temp_scaled = ((self.calibration_data.t_fine * 5.0) + 128.0) / 256.0
+        var1 = (humidity_adc - ((self.calibration_data.par_h1 * 16))) \
-        var1 = (humidity_adc - ((self.calibration_data.par_h1 * 16.0))) -\
+                - (((temp_scaled * self.calibration_data.par_h3) // (100)) >> 1)
-               (((temp_scaled * self.calibration_data.par_h3) / (100.0)) / 2.0)
+        var2 = (self.calibration_data.par_h2
-        var2 = (self.calibration_data.par_h2 *
+                * (((temp_scaled * self.calibration_data.par_h4) // (100))
-                (((temp_scaled * self.calibration_data.par_h4) / (100.0)) +
+                + (((temp_scaled * ((temp_scaled * self.calibration_data.par_h5) // (100))) >> 6)
-                 (((temp_scaled * ((temp_scaled * self.calibration_data.par_h5) / (100.0))) / 64.0) /
+                // (100)) + (1 * 16384))) >> 10
-                 (100.0)) + (1.0 * 16384.0))) / 1024.0
         var3 = var1 * var2
-        var4 = self.calibration_data.par_h6 * 128.0
+        var4 = self.calibration_data.par_h6 << 7
-        var4 = ((var4) + ((temp_scaled * self.calibration_data.par_h7) / (100.0))) / 16.0
+        var4 = ((var4) + ((temp_scaled * self.calibration_data.par_h7) // (100))) >> 4
-        var5 = ((var3 / 16384.0) * (var3 / 16384.0)) / 1024.0
+        var5 = ((var3 >> 14) * (var3 >> 14)) >> 10
-        var6 = (var4 * var5) / 2.0
+        var6 = (var4 * var5) >> 1
-        calc_hum = (((var3 + var6) / 1024.0) * (1000.0)) / 4096.0
+        calc_hum = (((var3 + var6) >> 10) * (1000)) >> 12
 
-        return min(max(calc_hum, 0.0), 100000.0)
+        return min(max(calc_hum,0),100000)
 
     def _calc_gas_resistance(self, gas_res_adc, gas_range):
-        """Convert the raw gas resistance using calibration data."""
         var1 = ((1340 + (5 * self.calibration_data.range_sw_err)) * (lookupTable1[gas_range])) >> 16
         var2 = (((gas_res_adc << 15) - (16777216)) + var1)
         var3 = ((lookupTable2[gas_range] * var1) >> 9)
         calc_gas_res = ((var3 + (var2 >> 1)) / var2)
 
         if calc_gas_res < 0:
-            calc_gas_res = (1 << 32) + calc_gas_res
+            calc_gas_res = (1<<32) + calc_gas_res
 
         return calc_gas_res
 
     def _calc_heater_resistance(self, temperature):
-        """Convert raw heater resistance using calibration data."""
+        temperature = min(max(temperature,200),400)
-        temperature = min(max(temperature, 200), 400)
 
         var1 = ((self.ambient_temperature * self.calibration_data.par_gh3) / 1000) * 256
         var2 = (self.calibration_data.par_gh1 + 784) * (((((self.calibration_data.par_gh2 + 154009) * temperature * 5) / 100) + 3276800) / 10)
@@ -407,7 +373,6 @@ class BME680(BME680Data):
         return heatr_res
 
     def _calc_heater_duration(self, duration):
-        """Calculate correct value for heater duration setting from milliseconds."""
         if duration < 0xfc0:
             factor = 0
 

library/bme680/constants.py

@@ -1,7 +1,5 @@
-"""BME680 constants, structures and utilities."""
-
 # BME680 General config
-POLL_PERIOD_MS = 50
+POLL_PERIOD_MS = 10
 
 # BME680 I2C addresses
 I2C_ADDR_PRIMARY = 0x76
@@ -120,7 +118,7 @@ TMP_BUFFER_LENGTH = 40
 REG_BUFFER_LENGTH = 6
 FIELD_DATA_LENGTH = 3
 GAS_REG_BUF_LENGTH = 20
-GAS_HEATER_PROF_LEN_MAX = 10
+GAS_HEATER_PROF_LEN_MAX  = 10
 
 # Settings selector
 OST_SEL = 1
@@ -135,7 +133,7 @@ GAS_SENSOR_SEL = GAS_MEAS_SEL | RUN_GAS_SEL | NBCONV_SEL
 
 # Number of conversion settings
 NBCONV_MIN = 0
-NBCONV_MAX = 9  # Was 10, but there are only 10 settings: 0 1 2 ... 8 9
+NBCONV_MAX = 9 # Was 10, but there are only 10 settings: 0 1 2 ... 8 9
 
 # Mask definitions
 GAS_MEAS_MSK = 0x30
@@ -216,37 +214,30 @@ REG_HCTRL_INDEX = 0
 
 # Look up tables for the possible gas range values
 lookupTable1 = [2147483647, 2147483647, 2147483647, 2147483647,
-                2147483647, 2126008810, 2147483647, 2130303777, 2147483647,
+        2147483647, 2126008810, 2147483647, 2130303777, 2147483647,
-                2147483647, 2143188679, 2136746228, 2147483647, 2126008810,
+        2147483647, 2143188679, 2136746228, 2147483647, 2126008810,
-                2147483647, 2147483647]
+        2147483647, 2147483647]
 
 lookupTable2 = [4096000000, 2048000000, 1024000000, 512000000,
-                255744255, 127110228, 64000000, 32258064,
+        255744255, 127110228, 64000000, 32258064,
-                16016016, 8000000, 4000000, 2000000,
+        16016016, 8000000, 4000000, 2000000,
-                1000000, 500000, 250000, 125000]
+        1000000, 500000, 250000, 125000]
-
 
 def bytes_to_word(msb, lsb, bits=16, signed=False):
-    """Convert a most and least significant byte into a word."""
-    # TODO: Reimpliment with struct
     word = (msb << 8) | lsb
     if signed:
         word = twos_comp(word, bits)
     return word
 
-
 def twos_comp(val, bits=16):
-    """Convert two bytes into a two's compliment signed word."""
-    # TODO: Reimpliment with struct
     if val & (1 << (bits - 1)) != 0:
         val = val - (1 << bits)
     return val
 
+# Sensor field data structure
 
 class FieldData:
-    """Structure for storing BME680 sensor data."""
+    def __init__(self):
-
-    def __init__(self):  # noqa D107
         # Contains new_data, gasm_valid & heat_stab
         self.status = None
         self.heat_stable = False
@@ -263,11 +254,10 @@ class FieldData:
         # Gas resistance in Ohms
         self.gas_resistance = None
 
+# Structure to hold the Calibration data
 
 class CalibrationData:
-    """Structure for storing BME680 calibration data."""
+    def __init__(self):
-
-    def __init__(self):  # noqa D107
         self.par_h1 = None
         self.par_h2 = None
         self.par_h3 = None
@@ -301,7 +291,6 @@ class CalibrationData:
         self.range_sw_err = None
 
     def set_from_array(self, calibration):
-        """Set paramaters from an array of bytes."""
         # Temperature related coefficients
         self.par_t1 = bytes_to_word(calibration[T1_MSB_REG], calibration[T1_LSB_REG])
         self.par_t2 = bytes_to_word(calibration[T2_MSB_REG], calibration[T2_LSB_REG], bits=16, signed=True)
@@ -334,20 +323,15 @@ class CalibrationData:
         self.par_gh3 = twos_comp(calibration[GH3_REG], bits=8)
 
     def set_other(self, heat_range, heat_value, sw_error):
-        """Set other values."""
         self.res_heat_range = (heat_range & RHRANGE_MSK) // 16
         self.res_heat_val = heat_value
         self.range_sw_err = (sw_error & RSERROR_MSK) // 16
 
+# BME680 sensor settings structure which comprises of ODR,
+# over-sampling and filter settings.
 
 class TPHSettings:
-    """Structure for storing BME680 sensor settings.
+    def __init__(self):
-
-    Comprises of output data rate, over-sampling and filter settings.
-
-    """
-
-    def __init__(self):  # noqa D107
         # Humidity oversampling
         self.os_hum = None
         # Temperature oversampling
@@ -357,11 +341,11 @@ class TPHSettings:
         # Filter coefficient
         self.filter = None
 
+# BME680 gas sensor which comprises of gas settings
+## and status parameters
 
 class GasSettings:
-    """Structure for storing BME680 gas settings and status."""
+    def __init__(self):
-
-    def __init__(self):  # noqa D107
         # Variable to store nb conversion
         self.nb_conv = None
         # Variable to store heater control
@@ -373,11 +357,10 @@ class GasSettings:
         # Pointer to store duration profile
         self.heatr_dur = None
 
+# BME680 device structure
 
 class BME680Data:
-    """Structure to represent BME680 device."""
+    def __init__(self):
-
-    def __init__(self):  # noqa D107
         # Chip Id
         self.chip_id = None
         # Device Id

library/setup.cfg

@@ -1,15 +0,0 @@
-[flake8]
-exclude =
-	test.py
-	.tox
-	.eggs
-	.git
-	__pycache__
-	build
-	dist
-	tests
-ignore =
-	E501
-	F403
-	F405
-	W504

library/setup.py

@@ -1,7 +1,7 @@
 #!/usr/bin/env python
 
 """
-Copyright (c) 2016 Pimoroni.
+Copyright (c) 2016 Pimoroni
 
 Permission is hereby granted, free of charge, to any person obtaining a copy of
 this software and associated documentation files (the "Software"), to deal in
@@ -38,17 +38,17 @@ classifiers = ['Development Status :: 5 - Production/Stable',
                'Topic :: System :: Hardware']
 
 setup(
-    name='bme680',
+    name            = 'bme680',
-    version='1.0.5',
+    version         = '1.0.4',
-    author='Philip Howard',
+    author          = 'Philip Howard',
-    author_email='phil@pimoroni.com',
+    author_email    = 'phil@pimoroni.com',
-    description="""Python library for driving the Pimoroni BME680 Breakout""",
+    description     = """Python library for driving the Pimoroni BME680 Breakout""",
-    long_description=open('README.rst').read() + '\n' + open('CHANGELOG.txt').read(),
+    long_description= open('README.txt').read() + open('CHANGELOG.txt').read(),
-    license='MIT',
+    license         = 'MIT',
-    keywords='Raspberry Pi',
+    keywords        = 'Raspberry Pi',
-    url='http://www.pimoroni.com',
+    url             = 'http://www.pimoroni.com',
-    classifiers=classifiers,
+    classifiers     = classifiers,
-    packages=['bme680'],
+    packages        = ['bme680'],
-    py_modules=[],
+    py_modules      = [],
-    install_requires=['smbus']  # preferably: install `python3-smbus` instead of relying on this
+    install_requires= []
 )

library/tests/conftest.py

@@ -1,101 +0,0 @@
-import sys
-import mock
-import pytest
-import bme680
-from bme680.constants import CalibrationData
-
-
-class MockSMBus:
-    """Mock a basic non-presence SMBus device to cause BME680 to fail.
-
-    Returns 0 in all cases, so that CHIP_ID will never match.
-
-    """
-
-    def __init__(self, bus):  # noqa D107
-        pass
-
-    def read_byte_data(self, addr, register):
-        """Return 0 for all read attempts."""
-        return 0
-
-
-class MockSMBusPresent:
-    """Mock enough of the BME680 for the library to initialise and test."""
-
-    def __init__(self, bus):
-        """Initialise with test data."""
-        self.regs = [0 for _ in range(256)]
-        self.regs[bme680.CHIP_ID_ADDR] = bme680.CHIP_ID
-
-    def read_byte_data(self, addr, register):
-        """Read a single byte from fake registers."""
-        return self.regs[register]
-
-    def write_byte_data(self, addr, register, value):
-        """Write a single byte to fake registers."""
-        self.regs[register] = value
-
-    def read_i2c_block_data(self, addr, register, length):
-        """Read up to length bytes from register."""
-        return self.regs[register:register + length]
-
-
-@pytest.fixture(scope='function', autouse=False)
-def smbus_notpresent():
-    """Mock smbus module."""
-    smbus = mock.MagicMock()
-    smbus.SMBus = MockSMBus
-    sys.modules['smbus'] = smbus
-    yield smbus
-    del sys.modules['smbus']
-
-
-@pytest.fixture(scope='function', autouse=False)
-def smbus():
-    """Mock smbus module."""
-    smbus = mock.MagicMock()
-    smbus.SMBus = MockSMBusPresent
-    sys.modules['smbus'] = smbus
-    yield smbus
-    del sys.modules['smbus']
-
-
-@pytest.fixture(scope='function', autouse=False)
-def calibration():
-    """Mock bme680 calibration."""
-    calibration = CalibrationData()
-    # Dump of calibration data borrowed from:
-    # https://github.com/pimoroni/bme680-python/issues/11
-    data = {
-        'par_gh1': -30,
-        'par_gh2': -24754,
-        'par_gh3': 18,
-        'par_h1': 676,
-        'par_h2': 1029,
-        'par_h3': 0,
-        'par_h4': 45,
-        'par_h5': 20,
-        'par_h6': 120,
-        'par_h7': -100,
-        'par_p1': 36673,
-        'par_p10': 30,
-        'par_p2': -10515,
-        'par_p3': 88,
-        'par_p4': 7310,
-        'par_p5': -129,
-        'par_p6': 30,
-        'par_p7': 46,
-        'par_p8': -3177,
-        'par_p9': -2379,
-        'par_t1': 26041,
-        'par_t2': 26469,
-        'par_t3': 3,
-        'range_sw_err': 0,
-        'res_heat_range': 1,
-        'res_heat_val': 48,
-        't_fine': 136667
-    }
-    for k, v in data.items():
-        setattr(calibration, k, v)
-    return calibration

library/tests/setup.cfg

@@ -1,8 +0,0 @@
-[flake8]
-exclude =
-	__pycache__
-ignore =
-    D100 # Do not require docstrings
-	E501
-	F403
-	F405

library/tests/test_compensation.py

@@ -1,42 +0,0 @@
-import pytest
-import bme680
-
-
-def test_calc_temperature(smbus, calibration):
-    """Validate temperature calculation against mock calibration data."""
-    sensor = bme680.BME680()
-    sensor.calibration_data = calibration
-    assert sensor._calc_temperature(501240) == pytest.approx(2669.81, 0.01)
-    assert sensor.calibration_data.t_fine == pytest.approx(136668.78, 0.01)
-
-
-def test_calc_pressure(smbus, calibration):
-    """Validate pressure calculation against mock calibration data."""
-    sensor = bme680.BME680()
-    sensor.calibration_data = calibration
-    sensor._calc_temperature(501240)
-    assert sensor._calc_pressure(353485) == pytest.approx(98716.92, 0.01)
-
-
-def test_calc_humidity(smbus, calibration):
-    """Validate humidity calculation against mock calibration data."""
-    sensor = bme680.BME680()
-    sensor.calibration_data = calibration
-    sensor._calc_temperature(501240)
-    assert sensor._calc_humidity(19019) == pytest.approx(42410.28, 0.01)
-
-
-def test_calc_gas_resistance(smbus, calibration):
-    """Validate gas calculation against mock calibration data."""
-    sensor = bme680.BME680()
-    sensor.calibration_data = calibration
-    assert int(sensor._calc_gas_resistance(0, 0)) == 12946860
-
-
-def test_temp_offset(smbus, calibration):
-    """Validate temperature calculation with offset against mock calibration data."""
-    sensor = bme680.BME680()
-    sensor.calibration_data = calibration
-    sensor.set_temp_offset(1.99)
-    assert sensor._calc_temperature(501240) == pytest.approx(2868.30, 0.01)
-    assert sensor.calibration_data.t_fine == pytest.approx(146831.78, 0.01)

library/tests/test_setup.py

@@ -1,13 +0,0 @@
-import pytest
-import bme680
-
-
-def test_setup_not_present(smbus_notpresent):
-    """Mock the adbsence of a BME680 and test initialisation."""
-    with pytest.raises(RuntimeError):
-        sensor = bme680.BME680()  # noqa F841
-
-
-def test_setup_mock_present(smbus):
-    """Mock the presence of a BME680 and test initialisation."""
-    sensor = bme680.BME680()  # noqa F841

library/tox.ini

@@ -1,25 +0,0 @@
-[tox]
-envlist = py{37,38,39},qa
-skip_missing_interpreters = True
-
-[testenv]
-commands =
-	python setup.py install
-	coverage run -m pytest -v -r wsx
-	coverage report
-deps =
-	mock
-	pytest>=3.1
-	pytest-cov
-
-[testenv:qa]
-commands =
-	flake8
-	flake8 tests/
-	flake8 ../examples/
-	rstcheck README.rst
-deps =
-	flake8
-	flake8-docstrings
-	flake8-quotes
-	rstcheck

packaging/CHANGELOG

@@ -1,9 +1,3 @@
-bme680 (1.0.5) stable; urgency=low
-
-  * New: set_temp_offset to calibrate temperature offset in degrees C
-
- -- Phil Howard <phil@pimoroni.com>  Fri, 01 Jun 2018 00:00:00 +0000
-
 bme680 (1.0.4) stable; urgency=low
 
   * Fix to range_sw_err for extremely high gas readings

packaging/debian/changelog

@@ -1,9 +1,3 @@
-bme680 (1.0.5) stable; urgency=low
-
-  * New: set_temp_offset to calibrate temperature offset in degrees C
-
- -- Phil Howard <phil@pimoroni.com>  Fri, 01 Jun 2018 00:00:00 +0000
-
 bme680 (1.0.4) stable; urgency=low
 
   * Fix to range_sw_err for extremely high gas readings

uninstall.sh

@@ -1,24 +0,0 @@
-#!/bin/bash
-
-PACKAGE="bme680"
-
-printf "BME680 Python Library: Uninstaller\n\n"
-
-if [ $(id -u) -ne 0 ]; then
-	printf "Script must be run as root. Try 'sudo ./uninstall.sh'\n"
-	exit 1
-fi
-
-cd library
-
-printf "Unnstalling for Python 2..\n"
-pip uninstall $PACKAGE
-
-if [ -f "/usr/bin/pip3" ]; then
-	printf "Uninstalling for Python 3..\n"
-	pip3 uninstall $PACKAGE
-fi
-
-cd ..
-
-printf "Done!\n"