I built an indoor air quality monitor on my Arduino Mega 2560 ( the Mega 2560 was a little over kill for this portion of the project, but I have plans to add Ethernet and an instrumentation amplifier to the same monitor). Final plans for this project include monitoring the solar system battery state and each charge controller along with temperature, humidity and CO2 levels by pushing the data to the MadScientistHut website so that I can monitor some stuff while I am away from the house.
The project currently uses a DHT22 to monitor the Temperature and Humidity. It monitors CO2 PPM with a GE, Telaire T6004 NDIR (Non-Dispersive InfraRed) compact carbon dioxide sensing module.CO2 PPM meter, that I got by removing the CO2 PPM meter from some surplus building monitoring equipment. The display is an 2X16 LCD Keypad shield. The sensors are soldered to a proto shield.
I will eventually create an Arduino library for the Telaire CO2 monitor, but not until I figure out the altitude calibration routine, but that may take some time.
Post time: Aug-04-2017