Switching to 5Ghz WiFi made the Raspberry Pi fly again

http://moritzhamann.com/blog/2024-10-08-raspberrypi-wifi-freq.html

by mrtz • 2 years ago

32 12 2 years ago

You can set BandModifier2_4GHz=0.01 to make 2.4GHz 1/100th as preferred in the excellent excellent iwd daemon (or 0 for disable).

https://man.archlinux.org/man/iwd.config.5.en#Rank

yjftsjthsd-h2• 2 years ago

Oh that's clever - not disabling/forcing it outright, but preferring one frequency over the other(s).

Havoc• 2 years ago

You can also get pretty cheap usb 2.5gbe dongles that work well with the pis

edarchis• 2 years ago

Cross-compiling ? Aren't M1 and Pi both ARM processors ? I've been building apps for my M1 to run on Pi without any issue. Some optimization options maybe ?

jcelerier• 2 years ago

If the app leverages the page size in some way you can get into very subtle crashes - app is built on M1 (with 16k page size), page size is stored in a constant in the binary because it's a macro, then you trt to access the entire range of a page in a pi (4k pages) - and things break.

nappy-doo• 2 years ago

Cross compiling is really defined as different platforms, not limiting it to instruction sets. Also, the M1 is an ARM, but the instruction sets aren't exactly the same.

mrtz• 2 years ago

Cross-compilling from MacOS to Linux. By default OCaml does dynamic linking of all C dependencies. Even with static linking there is a dependency on libc (or the MacOS equivalent) as far as I remember. I had some success so far with Rust, Nim and Go using a musl toolchain[1], but no luck for OCaml. At the moment I'm just using a docker container which mirrors the Debian distribution running on the Pi.

[1] https://github.com/messense/homebrew-macos-cross-toolchains

akhileshwar09• 2 years ago

it showing the website is not secure.

oarsinsync• 2 years ago

The website uses http, not https

aba_cz• 2 years ago

I've seen/fixed similar issue in someone else's Windows 10 notebook few days ago. It seems to have been caused by wifi having the same ssid for 2.4 GHz and 5 GHz and not-that-great signal so OS was for some reason "constantly" switching between those two. After forcing it to use just 5 GHz it went from 1 Mbps to 100 Mbps. Reading this sooner would have prevented my headache.

mkesper• 2 years ago

For reliability I suppose you always want LAN.

yjftsjthsd-h2• 2 years ago

Of course wired network is almost always faster, more reliable, and easier (no selecting ssid, no password, just plug in and it works), but it's not always an option; in an apartment you may not be able to do wired, or placement of the machine can render it impractical.

Switching to 5Ghz WiFi made the Raspberry Pi fly again

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