Great job on the manual Kasa data collection. I don’t have any Android devices in my house except a couple of big screen TVs, so I use the utility described here - self-contained and very easy to use if you have java on a computer..
Just looking at the data coming out of that utility, it looks like it has many places of precision beyond 2. I tried a histogram of the power results between 0.4W and 0.85W, with 1000 bins and there were no binning gaps, so the resolution is greater than 0.00045W.
