I just bought a Devolo power line set (2 devolo devices). I plugged them directly into wall outlets and connected one with my router and one with my laptop via a RJ45-USB-C adapter, because the laptop hasn’t a built-in RJ45 slot.
The Laptop (using a RJ45-to-USB-C adapter) doesn’t connect via the power line devices to the router. According to the ethernet settings the ethernet cable isn’t plugged.
Power Line Set-Up:
Router ◄───► RJ45 ◄─────► Power Line Adapter
┌───► Power Line ◄──────────┘
Power Line Adapter ◄───► RJ45 ◄───► RJ45-to-USB-C Adapter (Anker)
USB-C ◄───────► Laptop
After plugging everything in, the devices blinked red, then white. That’s—according to the manufacturer’s manual—the confirmation that the power line devices found themselves and connected securely.
I, then, looked into the network manager, and it said:
The issue may be similar to tethering, in that your system needs to identify the USB-Network adapter as such. If it doesn’t identify it correctly, you may need to tell your system the connected USB shall act as an Ethernet interface. https://wiki.archlinux.org/title/Mobile_broadband_modem
Thanks for the quick reply. The problem wasn’t the adapter.
The problem are the power line devices. If plugged into outlets within the same room, they’ll work.
As soon, as one is plugged in another room, they won’t work. Regardless, if the rooms are on the same floor or on different ones.
Maybe the fuse panel is the problem. I don’t know. It’s a disappointing experience.
Maybe someone with power line experience can shed some light on this or has a tip. Otherwise, I’ll return the devices by the end of the week.
Do you actually put them directly on wall sockets? I read they may not work correctly on multi-sockets, and even cannot work at all on SPDs.
Do you know your home’s electrical circuits from the breaker?
If the signal between two rooms must go through the breaker, that may also be the cause. Since one of its jobs is to prevent electrical spikes, newer models may work as SPD before the breaking threshold.
Your issue is most likely your electrical system as @maycne.sonahoz suggests.
Different sections of the premises is often wired into separate breaker/fuse.
If the sections where you place the devices is not on the same breaker/fuse - you cannot make it work.
I have worked with these devices and faced the same issue. In fact a common protocol X10 for device communication over the powergrid - has the same limitation. With the X10 a coupling device exist to make it possible for the communication to travel between sections. Maybe such a coupler exist for these devices as well - but implementing such device is NOT homework - it is a job for certified installer.
Although in our house we have two separate circuit breaker boxes (one for upper level, another for first level + basement), I’ve had no problem using a wall outlet-based ethernet connection whether the computer in question is upstairs or downstairs (the ISP router remains on the first level regardless).
I know we’re not big on “Brand” naming/shaming on this forum, but I will simply state that the power-line plugin set is made by Netgear. Not a recommendation - just FYI.
Best wishes for a successful resolution.
These power-line ethernet connections are a life-saver as configuration of various wi-fi adapters within Linux can take time and effort, during which you’d otherwise be stuck without 'net access.
Every Room has its own fuse/breaker. This is common practice where I live (and I guess, everywhere for electrical security reasons?). The breaker box looks similar to this:
(the power line connection should have gone from the living room to the basement)
Since people use power line across rooms and floors/levels, I was a bit stunned that it doesn’t work. After all what’s the use of power line if it can’t through a breaker? How do people connect the devices across floors?
I won’t get a phase coupler (if that’s the right word). The cost for the power liner adapters, the coupler and the electrician would probably way above a better Wi-Fi router and maybe a Wi-Fi extender. I would have liked Ethernet more, but well …
@SomeGuy Thanks for the info. Maybe I’ll try another power line brand.
I wasn’t sure about the name - but ‘phase coupler’ (‘fase kobler’) matches the word I know from danish and your junctionbox is exactly what I expected.
In danish installations both ground and live is wired through the breaker/fuse and from experience with both technologies (ether over powerline and X10 device control) this kind of setup requires a phase coupler.
One nasty workaround would be an extension cord from your livingroom to the basement solely for the powerline-eth device not pretty but it will likely work.
You could hide it using a 10mm wiretube as soft wire directly through building parts is a no-go.