search

morrownr / USB-WiFi

USB WiFi Adapter Information for Linux
2.6k stars 172 forks source link

WiFi for Linux devices with the best range #152

Closed girl313 closed 1 year ago

girl313 commented 1 year ago

Hi hi,

I need to connect two RPi4b far apart via Wi-Fi, I am thinking about "802.11n (Wi-Fi 4) 2,4GHz" vs "802.11ax (Wi-Fi 6E) 2,4GHz" But I don't know if Wi-Fi 6E on 2.4Ghz has a better range than Wi-Fi 4 2.4Ghz (maybe a negligible difference). For the distance I need, I tried to connect these two devices: "RT-AC53" and "AWUS036ACM" the connection has been established but is very unstable.

"RT-AC53" and "AWUS036ACM" from both these devices, AWUS036ACM has the better range.

1, I got an idea, buy the same device "AWUS036ACM" and connect them together via "802.11n (Wi-Fi 4) 2,4GHz"

And since I don't need 5Ghz, is it possible to somehow reset these devices to only 2.4Ghz (optimize)? I can't tell if one antenna is 2.4Ghz and the other is 5Ghz.

2, Or can you please recommend some two devices that I can use long distance and that support Linux well?

obrazek

thanks all.

morrownr commented 1 year ago

Hi @girl313

I got an idea, buy the same device "AWUS036ACM"

Based on what you are saying, not the direction I would go. The ACM is a fine general purpose adapter but it is not a "very long range" adapter.

And since I don't need 5Ghz, is it possible to somehow reset these devices to only 2.4Ghz (optimize)?

The radio's in these adapters can be single band or dual band or triple band. There is nothing like reseting. The software tells them what to do.

Or can you please recommend some two devices that I can use long distance and that support Linux well?

Sure. I'll throw some info out but I really need to know what throughput capable you are looking for and what your budget?

To think about:

See Main Menu: The Short List

Very long range:

ALFA AWUS036ACHM EDUP EP-MS8551 (no AP mode) Panda PAU08

See Main Menu: item 2 as it contains more details on each of the above adapters.

It would help if I had more info about what you are trying to accomplish.

Regards

girl313 commented 1 year ago

Thank you for your quick response!

I am trying to connect two RPi4b at this distance: https://i.imgur.com/PsoFe1w.png There are over 100+ different Wi-Fi signals in the area. The value for one device that I am willing to pay is 100 EUR (so, for two devices in total: 200EUR)

so I'm thinking about: https://www.alfa.com.tw/collections/wifi-outdoor?view=all&sort_by=manual

or: https://www.alfa.com.tw/collections/wifi-indoor-industrial-usb-wifi-adapter (170EUR) "ID36ACH" >>send>> >>recive>> "AWUS036ACM"

But I don't want the electricity bill to ruin me :-D

PS: I don't care about speed, I just need a stable connection.

morrownr commented 1 year ago

I am trying to connect two RPi4b at this distance:

I can't say that the distance would be a big problem with good adapters but unless you get both antennas outside with open air between them, you are probably looking at doing the impossible due to the numerous walls, floors and ceilings that will cause signal problems. Are you allowed to mount antennas externally?

girl313 commented 1 year ago

According to the video here, these basic models should have the best range: https://www.youtube.com/watch?v=lIM9yC8U42E AWUS036ACH = RTL8812AU = 2x Antenne AWUS036ACHM = MT7610U = 1x Antenne

but I dont know.. RTL8812AU I wonder if it is a problem to start this firmware on ARM Raspberry Pi OS and ARM Manjaro.

girl313 commented 1 year ago

I can't say that the distance would be a big problem with good adapters but unless you get both antennas outside with open air between them, you are probably looking at doing the impossible due to the numerous walls, floors and ceilings that will cause signal problems. Are you allowed to mount antennas externally?

good question, my mistake for not writing it sorry. No, it's not possible allowed to mount antenna external example: balcony.

morrownr commented 1 year ago

No, it's not possible allowed to mount antenna external example: balcony.

If that is the case, then I can't see a wifi solution to your problem. You may have to rethink solutions for what you are trying to accomplish.

Regards

girl313 commented 1 year ago

thanks thanks. the last stupid question, is one of the solutions teoretic better? https://i.imgur.com/B2FIRVo.png

morrownr commented 1 year ago

If it was me and I had the same problem and I could mount an external antenna, I would probably use 2 x Alfa ACHM. It uses in-kernel drivers and has the longest range of any modern dual band adapter that I have used. It also has a removable antenna which would allow me to remove the existing antenna so that I could install an outdoor antenna that is on an extension cable.

girl313 commented 1 year ago

(outdoor antenna that is on an extension cable) it good idea, thank you I really appreciate your advice :-)

PS: question, is one of the solutions teoretic better? https://i.imgur.com/B2FIRVo.png I would be interested in the theory if it is the same or one solution is better hmm.

girl313 commented 1 year ago

I think I found the answer to my question: https://superuser.com/questions/1595771/why-is-the-range-of-a-mobile-wi-fi-hotspot-shorter-than-that-of-a-router

I decided to buy two devices "AWUS036ACHM" and one "ID36ACH" = (Realtek RTL8812AU) for testing. I will try to use this: https://github.com/morrownr/8812au-20210629

If I had a problem with the drivers, can I ask you Master? :-)

riker65 commented 1 year ago

HI, will AWUS051NH work? I am confused about the chipset Looks like AWUS051NH is having Realtek RTL8188EUS

Thanks