I have found that if I run the Enviro+ with the supplied python examples for an extended time (hours), that the oxide reading just slowly climbs. It doesn’t ever seem to drop off. I understand that the device takes time to warm up but watching it go from 7k ohms to 18k ohms in a matter of 2 hours …

This huge peak in particles has a rise time of only a few seconds and has a half life of several hours. [image] It was caused by making the bed in another room with newly washed bedclothes!

This looks fascinating - is your code available for others to try? I’m trying to get Luftdaten to remove the ban on my Enviro+ for sending data too often, but they’re not replying to me. So I’m looking for something else to do with my two systems - one indoor and one outdoor - and had thought of try…

It is very much a work in progress as I want to add week, month and year views but I need to let it gather more data as it has only been running for three days so far. I can put it up on github in a few days, when it is a bit more complete.

One thing that has become apparent with the graphs is that if I stop the program for a few minutes the gas sensor cools down and it takes around 6 hours for it to reach equilibrium again. That seems a crazily long time for something so small. I wonder if the heater resistance varies enough with temp…

Now that I have a week of data I think I am seeing a slow climb like you. [image] The level is very erratic and this is mainly due to stopping the program for a few minutes. Other peaks are from gas cooking but the general trend seems to have gone from about 30K to 60K. The gas sensors do seem t…

That’s great - I’ve got it up and running on both my EnviroPlus systems. Many thanks

Good to hear as starting up with an empty data directory hasn’t really been tested because the program was very different a week ago.

It is a bit fussy at startup, in that it has a tendency to complain about ‘Particle read failed’ for a while. Sometimes that goes away on its own, but other times it needs exiting and re-running. I’ve also not worked out how to get it to reliably autostart on booting - which is possibly related to t…

Enviro+ Oxide Level slow climb

Support

nophead September 12, 2019, 11:00pm 35

As promised, I have put a version on GitHub, see EnviroPlus Assistance

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Enviro+ Oxide Level slow climb

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