Projekty z Raspberry Pi: Podłączanie czujnika BME680

				
					"""
s-Sense BME680 by itbrainpower.net sensors breakout example - v1.0/20200218. 

Compatible with:
                s-Sense BME680 I2C sensor breakout [PN: SS-BME680#I2C, SKU: ITBP-6003], info https://itbrainpower.net/sensors/BME680-BVOC-TEMPERATURE-HUMIDITY-PRESSURE-I2C-sensor-breakout
		all Raspberry PI, using Python 2.7

Reading temperature, pressure, humidity and gas resistance values example (pulling at 2sec) - based on Zanshin_BME680 Arduino library
version 1.0.2 / 2019-01-26 - https://github.com/SV-Zanshin. Thank you Zanshin! Great job! 
 
We've ported Zanshin functions into python, patch them, add some variables, functions and functionalities.                


Mandatory wiring [bellow for RPi B/B+/II/3B/3B+/4/Zero/Zero W]:
        - sensor Vin            <------> RPI pin 1 [3V3 power] *
        - sensor I2C SDA        <------> RPI pin 3 [i2c-1 SDA]
        - sensor I2C SCL        <------> RPI pin 5 [i2c-1 SCL]
        - sensor GND            <------> RPI pin 9 [GND]

Wiring notes:
        *    to spare 3V3 power - read about RPI I2C sensors 5V powering

WIRING WARNING:
        Wrong wiring may damage your RaspberryPI or your sensor! Double check what you've done.


BME680 definitions are placed in bme680_param.py


Bellow, how to set-up i2c on RPi and install requiered python packages and other utilities.

Enable I2C channel 1
        a. sudo raspi-config
                menu F5		=> 	enable I2C
                save, exit and reboot.
        
        
        b. edit /boot/config.txt and add/enable following directives:
               dtparam=i2c_arm=on
               dtparam=i2c_arm_baudrate=10000

           save and reboot.

Check i2c is loaded:
        run: ls /dev/*i2c*
        should return: /dev/i2c-1

Add i2c-tools packages:
        sudo apt-get install -y i2c-tools

Check sensor I2C connection:
        run: i2cdetect -y 1
        you should see listed the s-Sense BME680 I2C address [0x76]

Install additional python packages:
        a. sudo apt-get install python-setuptools
        b. wget https://files.pythonhosted.org/packages/6a/06/80a6928e5cbfd40c77c08e06ae9975c2a50109586ce66435bd8166ce6bb3/smbus2-0.3.0.tar.gz
        c. expand archive
        d. chdir smbus2-0.3.0
        e. sudo python setup.py install


You are legaly entitled to use this SOFTWARE ONLY IN CONJUNCTION WITH s-Sense BME680 I2C sensors DEVICES USAGE. Modifications, derivates and
redistribution of this software must include unmodified this COPYRIGHT NOTICE. You can redistribute this SOFTWARE and/or modify it under the terms 
of this COPYRIGHT NOTICE. Any other usage may be permited only after written notice of Dragos Iosub / R&D Software Solutions srl.

This SOFTWARE is distributed is provide "AS IS" in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 
or FITNESS FOR A PARTICULAR PURPOSE.


itbrainpower.net invests significant time in design phase of our IoT products and in associated software and support resources.
Support us by purchasing our environmental and air quality sensors from here https://itbrainpower.net/order#s-Sense


Dragos Iosub, Bucharest 2020.
https://itbrainpower.net
"""

from time import sleep
from bme680 import *


#default settings       =>      BMx280_OSR_X1, BMx280_OSR_X1, BMx280_OSR_X1, BMx280_Mode_Forced, BMx280_StandbyTime_1000ms, BMx280_Filter_Off
bme680Begin()                                                                   #start BMx280 w. default settings


#bme680Begin()                                                                          #start BME680 w. default settings
#bme680SetSettings(BME680_OSRX4, BME680_OSRX4, BME680_OSRX4, BME680_Filter_2)            #set specific settings

bme680SetGas(320, 150)                                                                  #set gas heater at 320C for 150 miliseconds


while(1):
        bme680ReadData()
        temperature = bme680GetTemperature()
        pressure = bme680GetPressure()
        humidity = bme680GetHumidity()
        print "Temperature: %.2f C" %temperature
        print "Pressure: %.2f Pascals" %pressure
        print "Relative Humidity : %.2f %%" %humidity
        
        gas = bme680GetGas()
        print "Gas resistence : %.2f mOhm" %gas

        sleep(2)