No internet. How do I get the Nucleus working again?

[BlackJack]

You need an access point that supports client mode (device that let wireless clients connect to a wired network but that also can be configured to do the reverse) or a wireless bridge (device to connect wired devices to a wireless network). The Archer C7 can’t be configured that way.

I use a MikroTik hAP ac lite (RouterBOARD 952Ui-5ac2nD) for such a task. For me, consumer grade products from market leading brands have regularly failed to do the job properly. MikroTik devices are very flexible but need good network knowledge to make full use of their capabilities but a simple bridge can be configured with the ‘Quick Set’ routine (just choose CPE and provide suitable defaults).

Maybe other users can provide information about devices they use and that do work (and are maybe not so demanding about the users network knowledge).

There is also a thread to share opinions about wireless bridges:

Share your experience with wireless bridges

For some of us, wired network connections are not always possible, even if they should be preferred. Generally, there’s nothing to say against the use of wireless networks, as long as all works stable and reliable. But that’s not always the case and the search for the cause is seldom easy. In most homes there’s a place where many devices (like e.g.: TV, game console, set-top box, streamer, endpoint, …) come together in close space. In my experience, when they all use their own radio to connect …