Tamiya - Here's the data for two of my pots over the past 6 months (fall/winter). I'm using customized gritty mixes, no 5-1-1. I have a third pot under a different light setup, but the data isn't wildly different.

The sensor moisture data is good, fertilizer scale is a little too high to be very useful, and the leaf temperature readings are handy.

This pot is under grow lights - Crassula aborescens:

This pot is under natural light in my living room - Schefflera actinopylla:

thanks Eww! :)

yeah saw your data collecting over Xmas time & started looking for the Parrot (love these French fellas for their ARDrone)... surprisingly FP was not easy to find :/ CBF'd sourcing from USA as AUD exchange rate is dismal atm, finally found some locally a few wks ago :)

got 2 poked into 2 pots in different locations... 1 is in chunky 5-1-1, other is in finer peaty C&S mix harbouring aeoniums

Interesting that your data is significantly more varied than mine so far.

both watering readings only spike to 25% then trail down to 20%... the 5-1-1 does that in 4-6hrs, the peaty takes 4-6days :)

Both light peak at 1.0 daily... dunno what this means, app complains low light.

fertiliser also doesn't move much from 1.0...? I've tried fertigating with liquid feed, tossed in some pellets... nothing seems to change readings much.

haha now wondering whether to move these 2 to different pots, or keep them there for long term consistency and eventually acquire a few more FPs :)

or I see they're gunna make a different "pot" version soon?

Not a problem. =)

The water readings depend on your mix and the probe contact area. I don't follow the moisture by the absolute numbers, but rather the curve. Once the curve starts to flatten out, that means the plant is having trouble absorbing any more water from your mix. It takes a couple watering cycles to see the trend.

The first pot of data I posted is an 6" orchid unglazed clay pot with lots of grit and very low water retention. Watering frequency is about every 5 days.

The second pot is a very large maybe 24-30" unglazed clay pot in what's closer to 1:1:1 and unsifted Turface. Same components, different ratio, totally different results. Watering frequency is about every 3 weeks.

Did you try soaking your pot for a few minutes? Maybe you are watering a bit too fast and the components are not absorbing enough water. Try that and see if you get much higher numbers.

When top watering gritty mixes, I found the most thorough method is to water to saturation, wait 10-15 minutes, and then water again. Not sure if you're doing that already, but it's another thing to try.

Lighting levels that peak at 1.0 are quite low. Is the light sensor facing towards the light and unobstructed? The scale is logarithmic:

• Range: 0.13 to 104 (mole x m-2 x d-1)
• Accuracy: +/- 15%
• The light sensor measures DLI (PAR).

Here is the data for my primary grow light setup:

And in my obstructed living room South window:

Last summer I had a flower power out in the garden with normal garden/potting soil and it was surprising how much liquid fertilizer was required to raise the levels. And then every time there was a good rain it was time to fertilize again...

As for moving them around, I think there's a lot of value in it.

You might find this TED talk interesting, as it deals with plant sensors and data. The talk starts off very simply about apples, but quickly gets in depth into (what I also agree is) the future of growing/growing technology:

http://www.ted.com/talks/caleb_harper_this_computer_will_grow_your_food_in_the_future