I am not an expert but if I get these components, how easy would it be to build a hacked version out of these?
I’m not in the US and unaffected by the tarrifs.
Programming libraries contain the basic functions necessary to access to sensors' readings with simple lines of code.
But the devil is in the details - to go from that to an actual practical, working model and physical build is quite a lot of work. Expect months, in hobbyist terms.
There are libraries which make it extra-easy:
SCD41: SparkFun_SCD4x_Arduino_Library.h
SGP41: SensirionI2CSgp41.h
LPS22: Adafruit_LPS2X.h
Take a look through the past HN discussions of this and similar air quality monitors. Can also search HN for chip names themselves (like 'SCD41'). Many people note that the sensors drift over time, and buying "calibration bottles" of low-concentration CO2 is a slight hurdle for many - they're not that crazy expensive, but they're expensive enough to be a bit of a block for some.
I’ll give it a try and see how far I go. Do you know any discord channels where such folks hang out?
P.S. Apt username BTW.