Nothing to do with Model Engineering, but someone out there will know. … Can I get some gizmo that will plug into his internet cable still allowing the computer to function, but receiving the wifi signal from the camera?
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Over 20 years since I did this sort of network design, so fingers crossed this is right!
First try connecting the camera to the existing wifi. Although the signal is poor in your son’s flat, it might be ok in the garden. If it is, no need to buy anything.
If that fails, a wifi extender should do it, like this example. Plug your son’s ethernet cable into it, and then connect his computer to the extended wifi network.
If you want to hardwire his computer rather than use the new wifi, an ethernet switch is needed, plus a pair of patch cables.
Dave