@Joe_barn Do you have power inside the barn? I suggest looking at this: https://community.tp-link.com/us/home/forum/topic/587544

@MikeInTheSticks Are you referring to the QOS feature by "other Deco models have started getting bandwidth control"?

@DecoUser4167568 As your Deco runs in AP mode, the devices connected to the main router should see the devices connected to the Deco mesh. If your phone has a weak connection, it will affect the...

@WingWand Do you observe the same behaviour if you plug one of the satellite Deco into the main Deco, bypassing the switch?

@Libertized It is aways beneficial to connect Decos via Ethernet cables, if you can install more cables, it is even better.

@tp-bungholio After you define the name/password of the new wifi network in the app, you should then connect your smartphone to the new wifi network. Does your smartphone show that wifi network in...