Add Code and Option for SCD30

[sbamueller]

The PaxCounter already allows for a variety of sensors to be attached. Eg. you can connect a BME680 and read such intersting things like Indoor air quality index. Wouln't it be great to have a SCD30 CO2 option included to measure CO2 Levels and thus be able to detect when its necessary to ventilate the room?

There are a variety of libraries available: https://github.com/sparkfun/SparkFun_SCD30_Arduino_Library and https://github.com/paulvha/scd30.

Especially durin the Covid pandameic it is becomming much more intresting to add a refrence or a measurement for people in a room and air quality.

[hansju-11]

Hello sbamueller,

I have a quick and dirty version based on paxcounter 2.4.0 as sensor 2. I just started to clean up it a little and extend it with 3 NEO pixels, so I can change the color depend on c02 level.

Do you have some specific request?

[cyberman54]

Could you add your solution as PR to development branch?

[hansju-11]

I put a PR on development branche today (#780) . So all of you can have a look on it.

[hansju-11]

I put a PR on dev branch today. It is a more complex way (like sds011 sensor).