Toots for manawyrm@chaos.social account

Written by Manawyrm | Sarah on 2025-01-09 at 20:20

TOSLINK is one of the very few consumer fiber optical standards. It transports digital, uncompressed PCM audio over plastic fibers.

Why not transport IP-over-Toslink instead?

It's a 1.536 Mbit/s data link after all...

https://www.youtube.com/watch?v=9uWi8iWym9c

New blogpost:

https://kittenlabs.de/ip-over-toslink/

/cc @n0emis @benjojo

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Written by Manawyrm | Sarah on 2025-01-06 at 12:36

A very strong talk recommendation from #38c3:

https://media.ccc.de/v/38c3-beyond-ble-cracking-open-the-black-box-of-rf-microcontrollers

Despite the very unassuming name talking about "BLE", this talk is about something much more interesting:

Reverse engineering the Cortex-M0 RF coprocessor and engines in the TI CC13xx radio chipsets!

Those chips are basically little I/Q SDRs with a bunch of hardware offloading. TI keeps all of this hidden away very nicely -- but now they've built tooling to work with that CPU core & RF offloading directly.

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Written by Manawyrm | Sarah on 2025-01-04 at 19:45

Update: @Toble_Miner and I won! This actually works now :)

https://kittenlabs.de/16bit-lvds-fx3-grabber/

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Written by Manawyrm | Sarah on 2025-01-02 at 14:38

Just noticed that I hadn't posted about this yet, I gave a talk about Blamba! (the GSM ringtone provider) at #38c3.

It's available on media.ccc.de now:

https://media.ccc.de/v/38c3-blmba-behind-the-scenes-of-a-2000s-style-ringtone-provider

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Written by Manawyrm | Sarah on 2024-12-31 at 23:07

OH:

"My New Year's Resolutions are to not become the main character in a Chubbyemu or Plainly Difficult video."

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Written by Manawyrm | Sarah on 2024-12-26 at 11:50

I‘m not repeating the same mistake as last year and ask at the end of congress…

Soo: Who‘s at 38C3 this year and wants to say Hi? :)

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Written by Manawyrm | Sarah on 2024-12-25 at 15:05

Getting that new battery for the T41 was a good idea — finally a proper notebook to get some real work done on the road 🤭😂

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Written by Manawyrm | Sarah on 2024-12-18 at 22:29

Friends don‘t let friends touch USB internals 🙃

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Written by Manawyrm | Sarah on 2024-11-20 at 11:04

Seeing 3.3Gbit/s of actual TCP throughput is quite impressive, it's my new all-time record for WiFi and even better than my all-time 5G maximum.

🍿 ready for the introduction of MLO (aka 5GHz + 6GHz bonding) support, which should give another little bump in performance.

The 4-core arm64 CPU in the router is still pretty bored at 3 Gbit/s, so there might be more performance to be had :)

Having this run with the open-source/mainline mt76 driver is very nice. mt76 has come a loong way :)

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Written by Manawyrm | Sarah on 2024-11-20 at 11:02

Got a chance to play with new WiFi hardware:

BananaPi BPI-R4, mt76-based WiFi 7 7/802.11be access point.

Support in mainline OpenWRT is now good enough to "just work".

No MLO support yet, WIP.

Client is a Intel BE200 M.2 card, 2x2 MIMO.

Was able to get MCS13 (aka 4096QAM) working at 320 MHz, which results in a 5.7Gbit/s PHY rate and ~3Gbit/s of actual TCP throughput.

BE200 drivers on Linux still seem a bit wonky, "only" 2 Gbit/s on Linux.

Windows 11 works as expected.

https://openwrt.org/inbox/toh/sinovoip/bananapi_bpi-r4

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Written by Manawyrm | Sarah on 2024-10-22 at 12:19

@ordnung Falls ihr gute Laune wollt: https://chaos.social/@AltTextHealthCheck@mastodon.social/113351020159217295

:))

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Written by Manawyrm | Sarah on 2024-10-16 at 11:23

Really quite a fancy new trick I've implemented (and now upstreamed in culvert):

ASPEED BMCs (like the AST2500) chips have an internal JTAG peripheral, which can be used directly from the host computer or externally via UART.

This means you can JTAG the ARM core running OpenBMC (or even the propritary BMC firmware!) without special tools or hardware hacking required!

https://github.com/amboar/culvert/blob/main/docs/OpenOCD.md

As a really nice added benefit, it can also debug the Cortex-M3 coprocessor:

https://social.tchncs.de/@arj/113316821744089870

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Written by Manawyrm | Sarah on 2024-10-11 at 13:00

[#]aurora borealis / #polarlicht video from last night (2024-10-10):

full resolution: https://www.youtube.com/watch?v=DIFwtBUd5OE

more pictures: https://chaos.social/@manawyrm/113286415252425394

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Written by Manawyrm | Sarah on 2024-10-11 at 02:25

Time for more #aurora posting 😺

Kiel, Germany, 2024-10-10 23:00 UTC

23mm, f/1.4, ISO1600, ~1s exp.

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Written by Manawyrm | Sarah on 2024-09-03 at 10:32

@ordnung Hm, performance is a bit wonky rn, DDoS by crawlers again or are the thermal issues back?

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Written by Manawyrm | Sarah on 2024-09-01 at 21:22

New blog post:

Executing Linux applications on a Raspberry Pi in less than 3.5s from power-up! 🚀🏎️

(and other power saving tricks)

https://kittenlabs.de/blog/2024/09/01/extreme-pi-boot-optimization/

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Written by Manawyrm | Sarah on 2024-09-01 at 05:06

New blog post (and software release):

Authenticating against a WiFi using EAP-SIM / cellular SIM cards

https://kittenlabs.de/blog/2024/08/31/wifi-auth-with-osmohlr/sim-cards/

FreeRADIUS EAP-SIM OsmoHLR/GSUP client:

https://github.com/Manawyrm/freeradius-osmohlr-gsup

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Written by Manawyrm | Sarah on 2024-08-21 at 10:20

New blog post:

My personal collection of Windows 11 tweaks/settings to make it less awful:

https://kittenlabs.de/blog/2024/08/20/windows-11-tweaks-usability-improvements/

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Written by Manawyrm | Sarah on 2024-06-02 at 03:51

OH: „Die Pupillen sind auf jeden Fall MPU-pflichtig!“ #GPN22

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Written by Manawyrm | Sarah on 2024-05-30 at 10:45

EDIT: Hopefully solved soon 🤞

Friend lost some luggage on ICE904 (near Montabaur), train ended in Cologne already. DB‘s lost and found seems to be closed for the public holiday.

Any clever ideas from the Bahn community? :BoostOK:

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