A friend and I recently found this link: https://i.sstatic.net/Lrons.jpg, the important parts shown below.

It's about an IT-Guy who works at Hogwarts to install WiFi and stuff. But WiFi and computers require electricity. Would it be possible to install a power supply at Hogwarts, since it is invisible for muggles? Would electric devices even work? (We know they at the "current state" wouldn't

Also see How can electricity not work at Hogwarts?, but maybe that could be changed)

One of the posts says, he found a fully functional server room, aka the room of requirement. If he sets up the WiFi routers in there, what's gonna happen to all the PC stuff when he leaves/the room disappears? Would the signal vanish right after he leaves the room or would it, like in the post, hold on until the room takes on another form?

Screenshot from the link:

enter image description here

  • 1
    This is probably not a productive question, but I'm not an expert in this canon. Commented Feb 26, 2016 at 16:59
  • 2
    i think this is a great question, its a funny article that alot of people are reading this last week.
    – Himarm
    Commented Feb 26, 2016 at 17:42
  • 1
    For those wondering, this is originally from The Setup Wizard. Commented Jan 13, 2018 at 4:13

3 Answers 3


Note: The whole answer assumes that it is possible to make Wi-fi routers work in a magical environment where "electricity, and computers and radar, and all those things – they all go haywire". This might be possible by using EMP shielded equipments (see Damon's comment to https://scifi.stackexchange.com/a/6306/60559).

I think the signal would not vanish immediately.

One of the forms in which the Room of Requirements can appear is the Room of Hidden Things. If you enter the RoR thinking "I need a place to hide something/keep something safe", the RoR will appear as the Room of Hidden Things, which by default contains everything that has been hidden there unless you close the loopholes (see Why does the Room of Requirement use the same hiding chamber for everything?).

Now, Wi-Fi often cannot penetrate thick stone walls, so setting up wireless routers and so on in the Room would probably not be a good idea. However, this seems to be a non-issue:

inside was a fully functional server room. Delighted, I found the information for the wifi running out of its routers and took a trip around the castle to test the signal strength

If Wi-Fi can indeed penetrate such a thick stone door, the signal would not vanish since the object that is emanating the signal is always there, in the Room of Hidden Things.

Conclusion: under the assumptions made by the guy quoted by the OP, i.e. if 1) electronics could work in Hogwarts, at least under certain conditions, and 2) Wi-fi propagation through a stone wall was not a problem, I think that the signal would not vanish.


No, and the answer has nothing to do with magic. Wifi is blocked by stone walls , and of course Hogwarts is all about thick stone walls. Getting good signal everywhere in the castle would be next to impossible!

  • 1
    just run lan through the school and set up hotspots in ever classroom/hallway. it would take work but you could have reliable single practicly everywhere.
    – Himarm
    Commented Feb 26, 2016 at 17:09
  • 2
    It would take a LOT of work because pulling cable through stonewalls is really hard too :) Commented Feb 26, 2016 at 17:31
  • 1
    thats when you just run cables on the ceiling using adhesives, or since were in a magical castle, perhaps use magic to lay the lines, they already have plumbing perhaps we could run electrical and lan next to the plumbing haha.
    – Himarm
    Commented Feb 26, 2016 at 17:41
  • 1
    Every time you try to run a new segment a Basilisk pops out :) Commented Feb 26, 2016 at 17:52

Electricity does not function properly in Hogwarts as there is "too much magic in the air".

“All those substitutes for magic Muggles use — electricity, computers, and radar, and all those things — they all go haywire around Hogwarts, there’s too much magic in the air.
(Harry Potter and the Goblet of Fire - Chapter 28)

SO... as Colin's batteries can't work in Hogwarts, clearly his camera is running off the magical atmosphere and he is then developing his photographs in the magical potion that causes the figures therein to move.
(old jkrowling.com - faq - Why did Colin Creevey's camera work etc?)

It has been speculated that this is because the high level of magical concentration found at Hogwarts gives off electromagnetic interference. If that is true, then using a Faraday cage would probably help.

Also, wizards have an aversion to muggle technology.

There is another reason for most wizards' avoidance of Muggle devices, and that is cultural. The magical community prides itself on the fact that it does not need the many (admittedly ingenious) devices that Muggles have created to enable them to do what can be so easily done by magic. To fill one's house with tumble dryers and telephones would be seen as an admission of magical inadequacy.
(Pottermore - Technology)

As others have pointed out, wifi fails at thick stone walls

Lastly, it should be noted that the blog in question fails to make sense on at least one other major point. The author is a muggle, which would raise all kinds of problems of how he would even get into Hogwarts and how the extremely prejudice magic community would allow it.

  • 1
    There's a good chance an enterprising wizard might find a magical way to shield anything that goes haywire when exposed to magic.
    – Nzall
    Commented Feb 26, 2016 at 16:49
  • 1
    @NateKerkhofs I don't think that adding more magic to the equation will make electricity any better. But I did add a bit about Faraday Cages.
    – ibid
    Commented Feb 26, 2016 at 16:58

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.