"Increasing" moisture?

[chucknorris101]

I have a few parasites flashed with different intervals to trial the signal pickup and for the most part it seems to be working well....but the data for the moisture being recorded by the log seems to be running in a strange direction. This one has the most data, but other longer interval sensors seem to be trending the same way. Did I screw something up on the programming? I get the battery voltage is tied to the output moisture, but it makes sense the voltage is going down, why would the moisture be going up? Is this expected/within tolerance? I didn't set up moisture/adc debug yet but that's the next step, but not sure where to look necessarily?

edit: I dont think i screwed it up as the main files were all pulled and used the latest firmware from the repo, only changes were MAC and prst name. just reflashed a few with debug on to run overnight, see what happens. (new readings with the new flash are even higher? was reading ~95 now at 100 after reinsertion?) Theoretically all i can think of is i screwed up something with the battery or the coding, or would it be like, interfacing with plant roots potentially that are absorbing moisture? idk! Or does calibration need to happen with every board?

[rbaron]

Hi @chucknorris101,

We have discussed this issue in #2 with some hypotheses and ideas to fix it. Tl;dr some initial drift is common and it should go away after a few watering cycles. Conformal coating is strongly recommended for durability (see here) and also helps.