“ATMOSCAN is a multisensor device aimed at monitoring indoor air quality.While many projects have been published that have similar purpose, this one is a complete system that summarises them all. It has an LCD color display, it is time & location aware, it is gesture controlled and it posts to ThingSpeak (or others) via MQTT, but can properly handle disconnected operations and reconnection. With its embedded rechargeable battery it lasts a full day when disconnected from power.
It uses a a multitasking cooperative framework and is very responsive to user input while sampling sensors, handling UI, posting to MQTT. In fact it squeezes quite a bit out of the tiny ESP8266. It does so by integrating a number of open source libraries and leveraging internet web services.
Credits for libraries go to a number of contributors, see later.”