Its an emotive subject pool cleaning, there are battery powered so cordless pool cleaners, they dont learn your pool so that should be dismissed. There are some with a remote steering just to prove that the above is true and they do miss bits. Most just move in an arc so randomly might reach the whole pool given long enough. I have owned pressure wash cleaners (extra booster pump required) at obviously more electricity used. I have owned vacuum robots both electric and pure vacuum. My operatives used them and so did customers and including getting them out set up cleaned and stored again every operative was quicker with manual cleaning. I sold them all and switched to a pool baster max which was good, its a battery powered vacuum broom with a very fine filter bag, now superceeded by the Volt range. My operatives liked the pool blasters as they are quick to pick up the odd leaf etc.
How does dirt leaves etc enter the pool? From above. Best way to remove dirt and leaves, from the surface skimming action before they sink. If the filtration isnt running them this idea fails most of the time. Why dont people run 24/7 cost. Re engineering the filtration allows me to run my pool for 24 hours for the same cost as most run 1.5 hours. If the way the water moves over the surface to the skimmers is not optimised by design then dirt and leaves miss the skimmers, become water logged and sink. So many times I witness a pool with clear water (actually a settling tank) become cloudy after “cleaning” like cleaning with a feather duster, you get a few bits the rest is thrown into the air to re settle later. A properly cleaned pool does not do that because there isnt a layer of fine dirt to mix up into the water. Most robots have aggresive movement and strong water jets so it mixes the dirt back into solution only to settle later. Manual cleaning allows slower movements that dont disturb and fine dirt/pollen so it can be vacuumed up. That said, pool brushes vary a lot, on mine I pulled out most of the brush bits to allow the water vacuum to work but better, I am working on a vortex vacuum head as an improvement to the usual ones, a vortex being one of the strongest forces in nature.
Wifi temperature, hmm, surface temperature doesnt tell the whole story, water stratfies so the surface few centimetres can record warm whilst lower is a very different story. This is one reason on heated pools I like to put the heated water in via low mounted returns or the main drain, at least that is a use for a main drain.
As far as pool brushes go, these are the best, the airfoil ensures downforce making pool wall and floor brushing much more effective without the overbalancing issue when pool wall cleaning. Available in france from the likes of Cash Piscine and Zyke etc.