-------- In message <b87b323b-2d8a-d33a-ae7d-43b6bc472...@irtelemetrics.com>, Dan Kemppa inen writes:
>The idea WAS to build a temp/pressure/humidity logger for time nuts use. I'm playing with a couple of these right now: https://www.te.com/usa-en/products/sensors/multi-sensor-modules.html and they seem to work fine, and delivers a good set of sensors for a good price. The one footnote I have is the so-called "eCO2" measurement. What really goes on is that they measure VOCs, "Volatile Organic Compounds" and have some magic formula to convert from "measured VOC" to "probable if CO2 if all these VOCs came from people in a room". The actual sensor is CS811B, and they're not exactly making a big deal about this in the data-sheet. Their algoritm may work for rooms like classrooms etc, but at least in my one-man office, this part of the board is essentially a fart-sensor. But the temp/humidity/light/battery voltage part works great. Havn't played with the motion detector, and didn't buy the microphone option. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.