Hi, when the C5400 losing connection, how about the lights on it? Is the internet light still on? Whether your firmware is the latest one, you can try to upgrade if the firmware is not the latest...

Is the Philips Hue Bridge a mesh device? Do you want to use it to build a mesh network with the Deco M9plus?

How about move the devices next to the main mesh unit, turn off the other mesh device, and make sure the smart devices only connected to the main unit's wireless network, then check whether the...

Which e-mail address you send to?

have you confirmed the remote control function is working or not with the kasa app? Like disable the wifi on your phone, then use the 4G network, and then use the kasa app to control the HS300, can...

no other way for the wired adapter