ESP8266 MQTT CCS811/BME280 air quality sensor

This is a simple sketch to measure the air quality with the CCS811 Air Quality Sensor. It get's compensated with an Bosch BME280.

I'm using the Adafruit CCS811 library which worked after I used the correct I2C address of 0x5A for my sensor.

Currently I'm testing if my setup works and the values are reliable - so please see this as a work in progress. Any Feedback and help is appreciated!

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Used here are the Sparkfun CCS811 and the Adaferuit BME280 breakout.

Config

Before compiling, you must implement your config by copying the file config.example.h to config.h in directory esp-ccs811-bme280-mqtt. After that you have to fill or change the values in config.h.

The read data get's dropped to the following topics using <mqtt-topic-prefix>. All values are retained, the online state is set to offline using mqtt's last-will.

<mqttTopicPrefix>status          online/offline (last will)
<mqttTopicPrefix>ip              system ip
<mqttTopicPrefix>temperature     temperature in °C
<mqttTopicPrefix>humidity        relative humidity in %
<mqttTopicPrefix>pressure        pressure in hPa
<mqttTopicPrefix>altitude        altitude in m
<mqttTopicPrefix>co2             CO2 concentration in ppm
<mqttTopicPrefix>tvoc            total volatile compound in ppb

Todo

• Check Sparkfuns CCS811 lib
• better configuration

Created with

• Arduino 1.8.1 (https://www.arduino.cc/)
• ESP8266 board definition 2.4.0 (https://github.com/esp8266/Arduino)
• Tasker (https://github.com/sticilface/Tasker)
• PubSubClient 2.6.0 by Nick O'Leary (https://github.com/knolleary/pubsubclient)
• Adafruit CCS811 Library (https://github.com/adafruit/Adafruit_CCS811)
• Sparkfun BME280 Library (https://github.com/sparkfun/SparkFun_CCS811_Arduino_Library)

Credits

Patrik Mayer, 2018 Tobias Schmitt, 2018

License

MIT