this post was submitted on 20 Dec 2024
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[–] [email protected] 3 points 3 hours ago

No but if you fill the room with water then it should be way faster

[–] [email protected] 9 points 5 hours ago* (last edited 5 hours ago)

Yes, but only in one direction and if you use UDP instead of TCP. Also your MTU needs to be small enough for the packages to fit between the blades of the fan, otherwise that causes package fragmentation.

/s

[–] [email protected] 27 points 15 hours ago (2 children)

Yes, but the tailwind becomes a headwind on the way back to the router so you won't see any actual speed changes. Putting a fan on both ends will cancel each other out too.

You need to change all the gaseous air out for either liquid or a solid as waves propagate faster through them. You should start with filling your house with liquid oxygen as a nice half step so you still have something to breathe easily, as solids are a bit more tricky.

[–] [email protected] 1 points 9 hours ago

What if i put the router in front of an open window, open the window behind my computer and put a fan between the two ?

[–] [email protected] 19 points 9 hours ago (1 children)

The general idea is correct, but since we're dealing with electronagnetic waves, they travel slower in any medium. So pumping out all the air of the room would technically make your wifi faster.

Liquid oxygen has (I think) a refractive index of about 1.2, so it would make the signals 20% slower (still very fast)

[–] [email protected] 3 points 7 hours ago (1 children)
[–] [email protected] 8 points 6 hours ago (1 children)

Dude waited 11 months of lurking and not posting or commenting anything, and breaks their silence with that attractive string of knowledge. I've got mad respect for them.

[–] [email protected] 3 points 4 hours ago* (last edited 4 hours ago) (1 children)

I'm a nerd too but come on, he's replying to an obvious joke with high school physics. There are more layers, do you want a more pedantic teardown?

  • Most likely, the "Wi-Fi speed" the Reddit poster needs to improve is the data rate, not latency.
  • The data rate can be improved significantly by increasing RSSI with a better physical setup, WDS, higher power etc. However, if the rate is too low at full bars, the bottleneck is the ISP plan or hardware specs.
  • The latency cannot really be improved without changing hardware or software, as the highest impact one can influence is in processing by the router and device. Some settings such as DNS cache size can improve latency in some cases with some downsides.
[–] [email protected] 3 points 4 hours ago

Meh, we all have our personalities. A lot of people hate my personality, but I just figure it's best to assume everyone on the internet is a stranger that could be a potential friend. If they answer things blunt or love to extrapolate with excruciating detail... Who am I to judge. I just make jokes and hope they don't accidentally make someone feel bad. Like I really wanted to reply to yours saying that you were just trying to show off and get me to call your words attractive as well ; ) haha.

[–] [email protected] 3 points 16 hours ago
[–] [email protected] 9 points 19 hours ago* (last edited 19 hours ago) (1 children)

It's not 1 way traffic. Signals go both ways. To increase your wifi speeds, have 1 fan blow from your router to your device and 1 fan from your device blow towards your router. Signals go faster in warm air so make sure to pump up the thermostat. It also goes faster with less CO2 in the air so make sure to open all windows (unless you own a Mac). Lower moisture in the air also improves speeds, so crank your AC on max. Also placing both your router and device in rice helps.

[–] [email protected] 2 points 14 hours ago

device in rice

Say that in any linux forum :)

[–] [email protected] 7 points 19 hours ago (1 children)

If you can create a vacuum with said fan, it can be faster.

[–] [email protected] 1 points 10 hours ago

Maybe if you made this vacuum encapsulated in a line. Surrounded by shielded metal and plastic.

[–] [email protected] 29 points 20 hours ago* (last edited 18 hours ago) (2 children)

No, the fan will blow the packets all over the place, which is fine for UDP, but any TCP/IP connection will suffer. Place the fan in front of the router so that the blades will catch any dropped packets and throw them back into the datastream.

[–] [email protected] 7 points 15 hours ago (2 children)

uh, hi. If you place the blades in front of the router, it will start chopping the packets before they even reach. You need to use an bladeless fan

[–] [email protected] 1 points 5 hours ago

No need, that's why we have the Don't Fragment bit in the IP header

[–] [email protected] 2 points 6 hours ago* (last edited 6 hours ago)

Alright so I've now got a router using cell signal hardwired into a Roomba randomly roaming the halls so everyone gets shitty connections all the time.

[–] [email protected] 3 points 18 hours ago

Everyone know that.

[–] [email protected] 9 points 21 hours ago (1 children)

The Wifi isn't waves made of air, the wifi is waves of the electromagnetic spectrum, similar to visible light, and they travel faster than you can perceive.

So no.

But you can do something similar with a microwave oven. It's just that any signal making it through the radiation of the oven would be disfigured and useless.

[–] [email protected] 4 points 20 hours ago (1 children)

I mean, that was my first thought... but would there be a measurable difference?

I mean lets be clear, with a fan you're adding like 8 mph to something going 299,792,458 meters per second. You won't notice anything.

But like, vacuum vs glass vs glass moving half the speed of light, could be an interesting what if. Relativity is always where my mind glosses over in physics.

[–] [email protected] -4 points 20 hours ago* (last edited 19 hours ago) (1 children)

Unless the air particles make real contact with the photons then you're not adding anything to anything, and the ones that do will be deflected.

Imagine a rock in space coming close to hitting a planet, or even entering a solar system at all. Similar scale.

[–] [email protected] 2 points 9 hours ago* (last edited 9 hours ago)

I think it's important to point out as well that there is a mesiarble difference between between the permittivity of free space and air. But to your point the difference is quite small: e_r air is 1.0006 whereas e_r freespace is 1.

While temperature and pressure do have an effect on e_r air I don't know enough to say that net movement of the particles in one direction would have a measurable effect. ~~My instinct is no.~~

Looks like lukewarm_ozone proved me wrong. https://lemmy.today/comment/13053868

[–] [email protected] 2 points 21 hours ago

So if I put a fan behind a source of light, shouldn't that make the particles faster?

[–] [email protected] 2 points 21 hours ago

Yeah but it's gonna scramble your signal, then send it spinning outwards.

[–] [email protected] 5 points 21 hours ago (1 children)

Remember: These people vote.

[–] [email protected] 2 points 18 hours ago

Reminder: most voters are the people.

[–] [email protected] 14 points 1 day ago (2 children)

Sort of a serious answer because I'm bored: You're thinking of speeding up the air when what you should be thinking about is speeding up the waves. But then your waves are reaching you plenty fast already with latency being in the single digit ms range. Not much of a point in trying to accelerate that, really. You won't notice anyway.

If you feel like your internet connection via Wi-Fi is slow then the bottleneck is probably not with the Wi-Fi part of your network but the Internet Access Point behind it. Or even further down the line.

Now this is based on the assumption that you are in a fairly typical network environment, i.e. using semi-current hardware with moderate, if any, electromagnetic interference in the area. If you're living right next to a high voltage transformer station and using a router from 2008 then, yes, you're going to have Wi-Fi performance issues.

But in most cases, people complaining about "slow Wi-Fi" are actually suffering from Internet connectivity issues.

Think of it this way: If you enjoy your McDonald's from the local franchise but you can only get 100 burgers per hour from them (of course you need MOAR!) then upgrading your 320hp Camaro to a 400hp Mustang is not going to enable you to pick up appreciably more burgers from the drive through in the same amount of time.

[–] [email protected] 6 points 22 hours ago (1 children)

Not entirely true.
In an apartment in the middle of a city, noisy neighbours can be a problem.

In those cases, it's best to jump to 5 GHz, and leave the 2.4 band alone.

[–] [email protected] 1 points 22 hours ago (1 children)

Except if you have an ECOVACS cleaning robot which refuses to work with modern 5GHz networks. I actually had to install a Wi-Fi bridge to get around that limitation; thankfully, I still had one lying around. Helped me get a better signal for my phone in the bathroom as well.

But thank you for adding this information. Congestion due to interference from other networks (I guess that's what you meant) can definitely be a factor as well. I guess that's the problem with the notion of "normal" that I employed rather carelessly.

Sidenote: the fact that your Wi-Fi still works in those conditions at all instead of shutting down goes back to pioneering research done by actress-cum-scientist Hedy Lamarr during WW2. Amazing woman.

[–] [email protected] 1 points 20 hours ago* (last edited 19 hours ago)

which refuses to work with modern 5GHz networks.

Companies that make IoT devices do this so they can save a bit of money. It lets them use lower end, cheaper wifi chips (or left over older-generation chips that they can buy at a discount). I'm not really a hardware person but apparently 2.4Ghz wifi radios are a lot simpler than 5Ghz ones. Apparently they're also $2-$3 cheaper which adds up when you're producing a lot of units.

Also, the 5Ghz band differs per country. For example, some channels are authorized in the USA but not in Europe. Some companies stick to 2.4Ghz to avoid having to make anything region-specific.

[–] [email protected] 3 points 23 hours ago (1 children)

There are plenty of things in a normal home that can cause serious signal attenuation (just installed new energy efficient windows? whoops! those IR blocking coatings severely attenuate microwave signals too). Poor AP placement is a very common cause of "slow wifi" and has nothing to do with your internet uplink.

[–] [email protected] 1 points 22 hours ago

Again, you point out why "normal" is an iffy notion to begin with. Thank you for elaborating instead of just downvoting. 🙂

Failing to fully utilize the existing antenna diversity options on modern routers/APs might be another common cause that comes to mind.

[–] [email protected] 10 points 1 day ago

Yes but you have to put a slit in front of it so the wifi waves turn into wifi particles.

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