iiinova — where your digital self keeps evolving

chrysn @chrysn.chaos.social.ap.brid.gy · 03/10/2026

The filter settings of Android allow specifically selecting whether or not test alerts from competent authorities are to be shown. This is an acknowledgement of the fact that incompetent authorities send their test alerts with threat alert metadata. The whole […] [Original post on chaos.social]

Screenshot of the Android "Wireless emergency alerts" settings. All switches ("Extreme threat", "Severe threat" etc) are ticked, "Test alert" (detailed as "Test alerts from competent authorities") is not.

Screenshot of Android "Emergency alert history" view.

History goes back to 2024, all with German text indicating test alerts ("PROBEALARM" and similar), classified variously as "Emergency alert", "Threat information" and (2024) as "Extreme threat".

000 0

chrysn @chrysn.chaos.social.ap.brid.gy · 15/09/2026

Bad Schandau gave me the positive surprise of a nice view and no illegal checks at a German border. Granted, we should already be in Dresden, but who is counting in a #nightjet.

View across the Elbe from a moving train. A tour boat is moored on the near more on the far side. The city riverfront has a mix of old and new buildings, a church tower is visible behind it.

Sun has just not risen over the hills behind the town.

000 0

chrysn @chrysn.chaos.social.ap.brid.gy · 14/09/2026

Heading for my first #ETSI meeting: on #DectNRPlus. After having contributed to many #IETF meetings in the last decade, how different can it be? Well, I know they have better graphics and worse hyperlinks. For everything else, I'll see in the coming three days. #nightjet

A train station scene. The sign says Hauptbahnhof; reflection makes the word "Wien" before it almost illegible. A motion blurred train leaves the platform, in front of a cyclist whose identity is hidden by the signpost. The ceiling of the station is visible, showing a variety of lights, and giving a glimpse of the black night sky.

100 1

chrysn @chrysn.chaos.social.ap.brid.gy · 08/09/2026

Slides of my introductions to DECT NR+ technology and implementations are up, from the @RIOT_OS summit and @ariel community day, respectively. summit.riot-os.org/2026/wp-content/… (full event at […] [Original post on chaos.social]

101 1

chrysn @chrysn.chaos.social.ap.brid.gy · 31/08/2026

Things that didn't make it into the #DectNRPlus slides for @RIOT_OS summit: making light fun of ITU's naming for the radio standards of the decade. No wonder 3G, 4G and 5G won the race for catchiness.

The "3 dragons: 2 serious, 1 silly" meme, but the middle one is silly.

Their labels are:
IMT-2000
IMT-Advanced
IMT-2020

000 0

chrysn @chrysn.chaos.social.ap.brid.gy · 25/08/2026

Da berichtet ein Dutzend Medien über die Wiedereröffnung des Engelstors als Zugang zum Tiergarten Schönbrunn von Hietzing aus, und kein einzigej Journalistu schafft's, die einzig wichtige graphische Information (zB. wie hier von den OpenStreetMap contributors) […] [Original post on chaos.social]

Ausschnitt eines Stadtplans, der eine Ecke des Schönbrunner Schlossparks an einem Verkehrsknoten (Hietzing) abbildet. Orange markiert ist ein Tor zum Park, ca. 50m östlich des Verkehrsknotens.

000 0

chrysn @chrysn.chaos.social.ap.brid.gy · 20/07/2026

I was a bit disappointed to see the #T2TRG (Thing-to-Thing Research Group at #IRTF) focusing on AI, but @tfiebig's take and the discussion after that made it all worth it.

010 1

chrysn @chrysn.chaos.social.ap.brid.gy · 19/07/2026

At today's #IETF #hackathon I had the opportunity to talk about recent work done jointly with @cryspen and @inria: embedded-cal is now getting to the stage where we could try first integrations into Lakers (a library implementing #EDHOC), and @ariel, which is in […] [Original post on chaos.social]

Overview of a room of people working in a hackathon and presentation: Slide shows EDHOC, OSCORE, SUIT and Bluetooth stacked on embedded-cal (providing COSE, NIH and TLS algorithms in an Embedded Rust interface), stacked on combinations of software, accelerators or hardware security modules.

The slide lists William Takeshi Pereira, Mališa Vučinić and Christian Amsüss, and Inria, Cryspen and NGI Zero Commons.

010 1

chrysn @chrysn.chaos.social.ap.brid.gy · 18/07/2026

On my way to the #IETF #hackathon. This time, my focus will be on #EDHOC (key establishment for devices with tiny footprints, trying out the Lakers implementation of the PSK draft) and #CBOR experiments around matching its information model with XSD types (to […] [Original post on chaos.social]

The river Wien from a bridge, in a stone embankment that might appear oversized. A green park next to it.

010 1

chrysn @chrysn.chaos.social.ap.brid.gy · 15/07/2026

A cool recent #Python change is PEP 783 <https://peps.python.org/pep-0783/>. Its practical impact is profound for users of #pyodide (Python running in the browser): They could always just install pure Python wheels from PyPI, but for those backed by C or Rust […] [Original post on chaos.social]

$A browser window with a Python repl: Welcome to the Pyodide 314.1.0.dev0 terminal emulator 🐍 Python 3.14.2 (main, Jul 8 2026 22:58:50) on WebAssembly/Emscripten Type "help", "copyright", "credits" or "license" for more information. >>> import micropip >>> await micropip.install("cbor-diag >= 1.1.5") >>> micropip.list() Name | Version | Source micropip | 0.11.1 | pyodide cbor-diag | 1.1.5 | pypi >>> import cbor_diag >>> cbor_diag.diag2cbor("1, 2, 3", seq=True) b'\x01\x02\x03'$

000 0

chrysn @chrysn.chaos.social.ap.brid.gy · 07/07/2026

@batolabo is getting ready to party at Donaukanal #Wien. Cool boat! (please #Alt4Me, typing is slow on mobile)

000 0

chrysn @chrysn.chaos.social.ap.brid.gy · 24/04/2026

Things not on my bingo card for this year: winning a prize for physical strength. Turned out, server lifting is a competition @netcup runs at #GLT, and a cute tux found a loving home.

A cute plush tux with "netcup" stitched on its belly.

000 0

chrysn @chrysn.chaos.social.ap.brid.gy · 23/04/2026

The diff on CSV data that #Forgejo (and thus #Codeberg) provides is really useful – right now for reviewing new #CoAP options and content formats as they go into the `coap-numbers` crate.

A pull request view on a PR titled "Add new option numbers". It shows a changed file with a color bar (9 changes: 7 additions, 2 deletions), and file name, followed by a tabular view of the CSV file:
In one line (name "Unassigned"), only the first "Number" column changed (from 141-251 to 141-234), followed by 4 wholly new lines in green ("235 | Proxy-Cri | RFC-ietf-core-href-29", a new Unreserved, etc).

000 0

chrysn @chrysn.chaos.social.ap.brid.gy · 07/04/2026

Pretty Open Source blinky hardware has arrived -- and the hybrid supercap even had enough charge after days of shipping to blink happily. More on @chipperdoodles' page at chippydootles.com/docs/anwaar/anwaa… #OSHW

010 1

chrysn @chrysn.chaos.social.ap.brid.gy · 27/03/2026

Preparing a demo for the @ariel booth at #CLT. If things goes to plan, you can control different #embedded systems running the same application from your browser. #CLT2026 #IoT #CoAP

A small USB development board (2.5x2.5cm, 8x8 RGB LEDs visible, USB attached at the top, labelled "ESP32-S3-Matrix") next to a large pixel clock (5x20cm, 32x8 pixels behind diffusor, black front, white case). Both show an animation that has different pixels show different brightness of the similar hue.

001 1

chrysn @chrysn.chaos.social.ap.brid.gy · 19/03/2026

@quixoticgeek Makes me happy once more to to live in #Vienna where those things work like this: If you have a ticket, you walk through. Otherwise, too (but you'd pay a fine when they catch you in one of the rare random checks).

Three oblong bollards, spaced a bit more than 1m apart, on a tactile area spanning across a corridor. Every other bollard has a blue box on top that could stamp and invalidate tickets.

000 0

chrysn @chrysn.chaos.social.ap.brid.gy · 12/03/2026

As @Codeberg's CI is seeing regressions around #IPv6, I'm exploring @codefloe, which uses a Woodpecker fork called Crow. Among many other nice things, it features a pipeline dependency graph. So far, this looks quite promising.

Screenshot of a web page section. A progress bar at the top shows a "Pipeline Progress: 12/13 steps", and a graph below shows how "test:3.13-minimal", "mypy", "ruff" and "reuse" depend on an initial "clone", several other tests depend on "test:3.13-minimal", and a final "build-pages" step depends on virtually everything else.

100 1

chrysn @chrysn.chaos.social.ap.brid.gy · 02/02/2026

I appreciate how #DeutscheBahn makes working on a train easy for #embedded development.

View in a train on the next seat. A blue development kit (Nordic nRF54LM20) rests on a fold-out shelf with an arresting latch that is suitably sized for the roughly phone-sized board.

002 2

chrysn @chrysn.chaos.social.ap.brid.gy · 31/01/2026

Conveniently, our @ariel stickers come in two colour variants. Otherwise it'd be hard on the eyes to label oneself an Ariel OS person while wearing Debian colors for easy recognition at #FOSDEM.

000 0

chrysn @chrysn.chaos.social.ap.brid.gy · 29/01/2026

The sign is a lie (and they knew that advance: train goes only to Köln), but still on my way to #FOSDEM. Happy any time to talk about #CoAP, #CBOR, #DectNrPlus, IoT security and embedded Rust development, especially on @ariel and @RIOT_OS.

Railway station with ÖBB train arriving. Overhead sign says NJ486 to Bruxelles-Midi.

000 0

chrysn @chrysn.chaos.social.ap.brid.gy · 12/12/2025

We're gathering momentum for slipmux, a transport of #CoAP over serial ports. That specification allows #embedded developers on simple boards that just have a UART to use the same tools with it as for talking to devices across the Internet. This includes […] [Original post on chaos.social]

Two overlaid terminal sessions:

$ aiocoap-client coap://ttyacm0.dev.alt/.well-known/core --credentials client.diag
# application/link-format content was re-formatted
<>; ct=0; title="Landing page",
</time>; ct=0; title=Clock,
</poem>; sz=1338,
</cbor>; ct=60,
</stdout>; if="tag:riot-os.org,2021:ser-out"
$

followed by a debug log that shows:

[DEBUG] Peer indicated use of the one preconfigured key by KID. (coapcore coapcore/src/seccfg.rs:382)
[DEBUG] Processing 19 bytes at start of message into new EDHOC Message 3. (coapcore coapcore/src/seccontext.rs:703)
[DEBUG] Taking out of CoAP stack: [ …and a lot of hex data

000 0

chrysn @chrysn.chaos.social.ap.brid.gy · 12/11/2025

Leaving Vienna for #DectWorld (Munich) in the small morning hours. Pros: Every street is a pedestrian area when there are barely any cars. Cons: Train station bakeries open way after the first train leaves.

Street at night: Praterstraße overlooking Praterstern plaza (with a tall navy memorial column) from mid-road. Street lamps, traffic lights and an ÖBB sign on the far side of the plaza illuminate the fog. No cars visible.

000 0

chrysn @chrysn.chaos.social.ap.brid.gy · 07/11/2025

We're doing a bad job adulting with IPv4-curious ISPs. Maybe we should adopt the "This is not a place of honor" mem instead? #IPv6

Adult lion and cub overlook the savannah: "Everything the light touches is the Internet".
Curious cub: "But what about that shadowy place?"
Lion, sternly: "This is IPv4."

000 0

chrysn @chrysn.chaos.social.ap.brid.gy · 19/09/2025

Careful if you're copying around Firefox profiles and rely on settings to be retained: The default value for the about:config key datareporting.healthreport.uploadEnabled differs by I-don't-know-what. If you disable the "Send technical and interaction data to […] [Original post on chaos.social]

A screenshot of Firefox's about:config page, filtered for datareporting.healthreport.uploadEnabled. The setting is to false, in thin font, indicating that it is the default.

A screenshot of Firefox's about:config page, filtered for healthreport. The .uploadEnabled setting is to true, in thin font.

210 2

chrysn @chrysn.chaos.social.ap.brid.gy · 17/09/2025

Terminal users who use #accessibility tools, what is your take on emoji in console applications, especially compared to marker characters (eg. angular brackets for directions or hashes for comments) and to explicitly spelled out labels? Does an "info" emoji […] [Original post on chaos.social]

Shell interaction:
$ ./aiocoap-client coap://demo.coap.amsuess.com/.well-known/core
(in gray:) # application/link-format content was re-formatted
(several lines with lots of syntax highlighting in the style of:)
</.well-known/core>; ct=40,

023 3

chrysn @chrysn.chaos.social.ap.brid.gy · 03/09/2025

Looks like I'm in the right place to start a riot. #RiotSummit

View into a university hallway, with chairs, tables, a staircase, and digital signage saying "RIOT Summit September 3 - 5, 2025" / "Meet in Dresden!" / "Welcome"

001 1

chrysn @chrysn.chaos.social.ap.brid.gy · 21/07/2025

Karolina Skrivankova understands how #IoT really should work. The recordings of the #IRTF presentation will be available at <https://datatracker.ietf.org/meeting/123/session/t2trg/>, but the slide highlight works standalone.

Slide showing different software on different hardware over time. Overlaid is a screenshot of Braveheart, with William Wallace screaming for "UPDATES!"

000 0

chrysn @chrysn.chaos.social.ap.brid.gy · 13/07/2025

One season later: All bloom is gone now -- more plants yet to come. #plant #photography #haiku

Green fruit on an unidentified tree.

As with all pictures in this series, it is the same plant as in the original post.

A raceme (mislabeled as an umbel last time) carrying small green fruit on an unidentified tree.

050 5

chrysn @chrysn.chaos.social.ap.brid.gy · 23/04/2025

Spring at the stable: plants out of muzzles' reach grow undisturbed. #plant #photography #haiku

A group of ~20 brown buds on a tree, looking hard like pods. A single purple blossom already emerges. More different trees blurred behind.

An umbel of white bloom, with pistils extended wide for most parts but some blossoms still barely open at the top.
It extends from between the lush green leaves of a tree.

Cherry blossom, viewed from close enough to see individual, largely open, flowers.

Closeup of a fir's new needles as they shed their brown protective coat.

100 1