I am using lots of Shelly IOT devices in my motorhome/caravan and haven't had a great experience. To the point that I started moving device functionality away from Shelly to hardwired connections.
All my Shelly devices have been sort of problematic inside my motorhome/caravan, especially the Shelly humidity and temperature devices.
I previously sort of got some of the devices to work by moving my Ubiquiti AirCube to the other side of the motorhome
My back brain sort of finally kicked up a what if?
I searched the configuration of the AirCube and turned it’s transmit power down from 20db to 8db for the 2.4GHZ band and all of sudden my sort of flaky Shelly IOT devices now seemed to be rock solid!!!
I was able to move the AirCube back to it’s original location where it functions as a access point and a data switch.
I guess if you think further about it our motorhomes are just one big metal tube/echo chamber for WiFy signals...