Add CO2 monitoring to our meeting rooms

[johnmckerrell]

"three people quietly sitting in a mid-size conference room produced CO2 levels that within 60 minutes, reached concentrations high enough to impair their ability to make the right decisions."

http://blog.gigabase.org/en/contents/132

[goatchurchprime]

This is already done. I have the CO2 monitor and MQTT thing running from a breadboard on my desk, and showing up on the node-red dashboard. It has a screen with the numbers on it, so it is portable. All it takes is we got to do something with it.