I have been observing dropouts and testing for a couple of months with a 2902 array and the ObserverIP.
In every case it has been related to range and distance between the outdoor array and the ObserverIP
When I have caught the dropout a power reset will not fix it, but if I raise the ObserverIp one foot, or move it horizontally one foot it will link up again.
I too have been observing many dropouts since we installed the WS-2902A. The distance from the sensor array to the console is about 120 feet, direct line-of-sight, with nothing but a window between them. Still, it either seems
very sensitive to position / orientation, or... something else is going on.
The weather station is at a typically-unoccupied location, so I set up a wifi / internet connection monitor (sending data every 10s to a site I run). It's clearly not the wifi or internet -- multiple dropouts during periods where my monitor is fine. The dropouts can be as long as 2-1/2 hours. New (lithium) batteries in sensor array.
I have a WS-1401-IP at home (two blocks away), and it is rock-solid, with the Observer IP about 50' from the sensor array, though through several walls. The 2902A is reporting only to WU.
It's super frustrating -- we (local yacht club) got the 2902A because of the reliability of my 1400, but so far the results are terrible.
I'm not sure what to do but to keep experimenting with console positioning. Does anyone know whether the orientation of the console relative to the sensor array makes any difference? We have it more-or-less perpendicular (i.e., as you look at the console screen, you see the sensor array beyond it), as I would guess that would be best.
TYC:
https://www.wunderground.com/personal-weather-station/dashboard?ID=KCABELVE30Mine:
https://www.wunderground.com/personal-weather-station/dashboard?ID=KCACALIF74