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.

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

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

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.

@reiver I think #CoAP is a good fit. It's easy enough to explain on a napkin, extensible, has the familiar REST semantics, and can be implemented on the smallest of devices.

Plus it has a well-vetted security mechanism that is lightweight enough to be implemented by a single person.

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

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]

Milliseconds matter in smart cities. MAPS Messaging powers ultra-low-latency CoAP messaging, delivering sub-30ms transmission speeds across 300+ edge nodes. Built for timing-critical IoT.
#CoAP #LowLatency #MAPSMessaging #SmartCities #EdgeMessaging

Unlock the power of your IoT data! MAPS Messaging bridges diverse protocols (MQTT, CoAP, AMQP, STOMP) with real-time ML for Anomaly Detection, Predictive Maintenance & Data Enrichment.
#IoTData #PredictiveMaintenance #AnomalyDetection #RealTimeML #MQTT #CoAP #AMQP #STOMP

Unifying MQTT, CoAP, AMQP & STOMP, MAPS Messaging brings real-time data routing to smart cities & industrial IoT—no firmware changes needed. Built for the connected future. Learn more: mapsmessaging.io!
#IndustrialIoT #ProtocolBridging #MQTT #CoAP #AMQP #STOMP #EdgeIoT

IoT data flows smarter with MAPS Messaging. Real-time ETL from edge devices to cloud & databases, with protocol mapping (MQTT, CoAP, AMQP), JSON→CBOR conversion & metadata enrichment. Fast, secure, interoperable!
#RealTimeETL #EdgeToCloud #MQTT #CoAP #AMQP #JSONtoCBOR #IoTIntegration

MAPS Messaging powers smart infrastructure in IoT, bridging MQTT & CoAP with real-time event routing and sub‑15 ms latency. No firmware rewrites, just seamless IoT messaging. Explore more: mapsmessaging.io!
#SmartInfrastructure #RealTimeIoT #MQTT #CoAP #LowLatency #IoTMiddleware #EdgeComputing

Original post on chaos.social

Development of aiocoap, my Python CoAP library, is approaching its next breaking release.

If there's anything about its usability as a library that has been bugging you, especially if it would require breaking changes: Let me know soon, either here or on the issue tracker at […]

Original post on chaos.social

Thanks to @pyodide and @ProjectJupyter, using #CoAP is becoming more accessible: The latest version of the #aiocoap documentation has examples that can be run directly from the documentation, and access CoAP peers through a WebSocket-to-UDP cross proxy:

< […]

Ahhhhhh, my Internet-Draft is in the #RFC Editor queue 😱 #IETF #DNS #CoAP #DoC #DNSoverCoAP www.rfc-editor.org/current_queue.php

Original post on chaos.social

I'm fixing #aiocoap's memory leak tests to finally run as async functions: the original tests employed mechanisms from the age of tulip (back when asyncio was developed out-of-tree), and Python 3.14 dropping some obsolete mechanisms.

Good riddance, but also tough work fixing subtle possible […]

Fragmented protocols stall IoT performance. MAPS Messaging bridges CoAP, AMQP & STOMP—delivering seamless, real-time protocol translation for connected systems at scale. One platform. Unified messaging.
#IoTTranslation #MAPSMessaging #Interoperability #CoAP #AMQP #STOMP

Managing MQTT, CoAP & STOMP separately? It’s time to unify. MAPS Messagingintegrates all three protocols into a single, intelligent middleware, reducing complexity and enabling seamless messaging across diverse devices.
#IoTIntegration #MAPSMessaging #Middleware #MQTT #CoAP

Ascon-AEAD128 for JOSE and COSE This document describes JSON Object Signing and Encryption (JOSE) and CBOR Object Signing and Encryption (COSE) serializations with Ascon which received a lot of attention in the area of lightweight cryptography. In 2019, as a part of CAESAR competition, Ascon-128 and Ascon-128a were selected as the first choice for the lightweight authenticated encryption [asconv1.2-caesar]. After, in 2023, National Institute of Standards and Technology (NIST) selected Ascon family of cryptographic algorithms to be the standard for lightweight cryptography [asconv1.2-nist]. This recognition makes it particularly interesting to use Ascon with COSE and JOSE structures. This document does not define any new cryptography, only serializations of existing cryptographic systems described in [NIST.SP.800-232].

… and #IETF is not far behind, with datatracker.ietf.org/doc/draft-ochkas-cose-as... almost ready to assign algorithm identifiers so this can be used in #OSCORE for #CoAP.

Original post on chaos.social

Discussions during the current #IETF meeting led me to write a new draft on a compact CoAP URI expression, Short Paths In CoAP (ShoPinC, following the trade tradition of contrived acronyms).

As not all of the #CoAP crowd is reading the IETF lists, I'm soliciting opinions or feedback from here […]

I hope that by the end of the year, I can use this in my favorite embedded OSes, @RIOT_OS and @ariel, as well as on bare metal systems, for firmware updates or encrypted #CoAP communication.

Original post on mastodon.longlandclan.id.au

As for multicast Block1 (block-wise PUT/POST request)… I think the block-size would have to be negotiated up front via a separate custom option.

Call it MCBlock1 (option 65000), unsigned integer consisting of:
- bits 0-3: SZX - Size exponent
- bit 4: P - Proposal
- bit 5: S - Master selection
- […]

Original post on mastodon.longlandclan.id.au

A silly protocol idea has been brewing in my mind… CoAP over AX.25.

The thinking is this… use UI frames to encapsulate CoAP messages in the same manner as UDP and use a URI scheme like coap+ax25://DEST[,DIGI1[,DIGI2…]]/[path]

If DEST has the C/H bit clear, DEST is a "multicast" group […]

oneM2M - ACME oneM2M CSE

If you are an #IoT #developer and need to combine several #protocol #bindings for an #IoT system, the acmeCSE provides a great environment for learning and experimentation acmecse.net/home/Support... #CoAP #http #MQTT #WebSocket

oneM2M - ACME oneM2M CSE

If you are a #developer and need to combine several #protocol #bindings for an #IoT system, the ACME-CSE provides a great environment for learning and experimentation acmecse.net/home/Support... #CoAP #http #MQTT #WebSocket

Original post on chaos.social

Just published a tutorial on my blog: Building a CoAP application on Ariel OS. It is not short, but aims to pick up interested developers from minimal prior knowledge of the fields, into actually writing code on embedded Rust systems […]

Original post on chaos.social

An unplanned product of the #IETFHackathon was a new #CoAP tool: coap.amsuess.com/view/ is now usable as a browser tool to fetch CoAP resources.
It is not pretty, and takes a few seconds to load, but then it's just 150 lines of code […]

oneM2M - ACME oneM2M CSE

If you are a #developer and need to combine several #protocol #bindings for an #IoT system, the acmeCSE
provides an open source and easy to use environment for learning and experimentation acmecse.net/home/Support... #CoAP #http #MQTT #WebSocket

With @FrOSCon upcoming, we are scheduling our devroom's program: We will have a general RIOT OS introduction tutorial on Saturday, one on #embedded #RustLang development, as well as at least a short presentation on an upcoming #CoAP stack.
Find us there!
#FrOSCon #IoT

Original post on fosstodon.org

A new release has been published: RIOT OS 2024.07, nicknamed StrikinglyCrowded, is available as of today. This release of the friendly #OS for the #IoT features support for more hardware, PSA backed key storage, as well as many improvements in our #CoAP support.
A big thank you to everybody who […]

Vous avez aimé #mqtt ? vous allez adorer #CoAP une réduction du protocole HTTP pour l'embarqué, c'est pareil, mais en UDP, en plus simple, en asynchrone, et il est possible d'utiliser des passerelles.

www.rfc-editor.org/r...

Next, I presented a way to transfer these (and classic DNS) messages in an encrypted manner using #CoAP in #core using “DNS over CoAP” datatracker.ietf.org/meeting/118/... www.youtube.com/watch?v=smmD...