In June 2016 I backed a project on Indiegogo, for a air quality monitor. The small device will monitor the amount of CO2.
In the time during backing the project and final delivery in September the project is extended with possibility to order extra sensors, like temperature, humidity, and what I’ve remembered, also a dust sensor and also an RF piece of hardware. I just want to have the basic CO2 sensor with wifi, where the CO2 sensor had an upgrade to a more sensitive one with better range. The first sensor had a range of 400-2000 ppm. The final sensor has a range of 400-5000 ppm.