Only had one that would not connect to network. Flashed red LED. Unscrewed the cover, took the batteries out and did setup over again. It worked.
We’re supposed to get 1” or more rain tonight. We’ll see.
All my battery readings are 83% or lower but hey were supposed to be new. I installed Energizer Lithium Ultimate to get the longevity, but there was no choice for that in setup.