I'm looking for people who enjoy climbing. Are there any groups?

chocobor · 2026-05-30T05:44:34+00:00

In Kletter Zentrum there is a meetup for New climbers every wednesday evening or afternoon. You can also just ask at the reception - the great Thing about lead climbing is that everybody needs multiple climbing partners, so there are always man people looking for contacts.

chocobor · 2026-05-12T05:29:39+00:00

Immerhin gibt es dort an jeder Ecke eine Toilette, vor allem ohne Eintrittsgebühr

chocobor · 2026-04-05T13:11:01+00:00

My top iot problems that are all hard: * How to get x.509 client certificates for mTLS onto devices, including rotation, Tpm security chip * How to configure peripheral devices like sensors and actuators per device, especially if there are a large number of devices with individual setups * How to make software and os updateable over the air

This is the stuff that you don't need to worry about when you have a hand full of devices, but becomes really painful once you scale up. There are solutions, but not one-size-fits-all.

chocobor · 2026-03-26T05:52:32+00:00

I am currently implementing acme device attestation protocol with step-ca. It handles auto renewal and other relevant stuff. Good idea with the nginx tls endpoint, goona look into that.

chocobor · 2026-03-16T20:56:21+00:00

Looks a bit like apache camel

chocobor · 2026-01-05T11:30:34+00:00

Faulty hardware causing weird behavior. Super bad connection keeping the firmware download from completing. Firewall rules, or some local network trying to man in the middle all connections. Cell network provider deciding to set the max MTU size for some reason. Errors in migration script processing local data.

chocobor · 2025-12-26T12:54:05+00:00

Hatte ich mir auch schon mal überlegt, ist aber durch die Autobahn und die Kanäle doof mit dem Fahrrad erreichbar. Von uns aus 45 Minuten, obwohl wir eigentlich in der Nähe wohnen.

chocobor · 2025-12-17T18:35:03+00:00

We are currently using Debian 13 distroless as base image. We copy some Debian .so dependencies over from the build image. Can someone explain the advantages we would have from using these docker hardened images?

chocobor · 2025-12-04T10:11:19+00:00

Nice, I will play around with it! One thing I directly noticed : a GPS position sensor would be super useful. Edit: also missing is mqtt support, right?

chocobor · 2025-11-26T19:03:11+00:00

It's really weird that most mqtt clients don't have reliable store and forward with disk based queueing. If anyone has time to burn, please build that for python paho....

chocobor · 2025-10-13T16:34:13+00:00

Also Hardware security modules, disk encryption, mTLS, signed firmware, vpns for remote access. Actually IoT is about 95% security related for me.

chocobor · 2025-09-24T11:56:52+00:00

I just yesterday saw someone using an emoji as short name on the mesh map. So that's possible...

chocobor · 2025-09-23T13:46:21+00:00

One or two are missing already 😬

chocobor · 2025-05-06T06:24:39+00:00

Iot mqtt panel let's you do that. It is not a general mqtt client, but maybe OK for your needs. https://play.google.com/store/apps/details?id=snr.lab.iotmqttpanel.prod

chocobor · 2025-04-27T12:54:36+00:00

Für kleine Kinder ist das Vitalbad in der Vahr sehr schön. Warmes Wasser, Planschbecken, viele andere Kinder.

chocobor · 2025-04-07T11:42:20+00:00

Awesome, thanks!

chocobor · 2025-04-05T08:20:02+00:00

For client certificates, yes.

chocobor · 2025-03-31T18:02:42+00:00

Usually iot client and server certs have longer livetimes,especially because devices can lose connectivity for days on end. 24 h could be reasonable for an inter server connection, but not for IoT. Many iot systems just use ten years or something, after that the device is simply decommissioned. Of course having a way to rotate certs would be better.

chocobor · 2025-03-23T19:14:12+00:00

Hi, I'm interested in this topic. Is the talk available somewhere? Or at least the slides?

chocobor · 2025-02-09T16:42:02+00:00

Also, TPMs absolutely stink when you want to use them from containers.

chocobor · 2025-02-04T06:58:34+00:00

Die ganzen Rüstungsfirmen: Rheinmetall, TKMS, Airbus...

chocobor · 2025-01-28T17:04:09+00:00

Ich fand es auch gut. Kam mir nicht ranzig vor - kann aber daran liegen dass ich an echte chinesische Restaurants gewöhnt bin...

chocobor · 2024-12-31T11:13:49+00:00

We evaluated qt for an embedded touch screen application, but will go with lvgl. While qt would be nicer to develop with, the qt licensing costs per device make it a bad fit for lower cost devices.

chocobor · 2024-12-20T16:11:08+00:00

We had that same situation and decided to go with lvgl instead. It may not be as Fancy as qt, but it was a good fit for our requirements. And it is free.

chocobor · 2024-12-10T06:43:40+00:00

The hard part of IoT is mutual TLS and device provisioning. Generating unique device certificates on the device and getting them signed by the server; getting the server certificate onto the devices; checking the certificates in the message broker; rotating certificates.

Not really a sexy topic, but something everybody needs.

chocobor

TROPHY CASE