Latest posts
The ten most recent publications.
From 2 to 6 October 2026, the International Space Station is transmitting twelve images via SSTV on 437.550 MHz as part of ARISS Series 33. I received them in Meerane with a Raspberry Pi, an RTL-SDR stick, a simple magnetic-base antenna and OpenWebRX+, and on the first usable pass two images came through cleanly. The deciding factor was not the antenna, but a small script that tracks the frequency during the pass and saves the images itself.
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In September I made AI speak locally, got a 35-billion-parameter model running on a single graphics card and, according to OpenAI, used 2.9 billion tokens in the cloud. A present for a friend still did not get finished. This post shows where the waiting time of a voice AI really comes from, why an HTTP 200 can lie and what a token counter reveals about AI agents.
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Christian Stankowic and CodeSalat show how MeshCore and Meshtastic enable independent text networks and custom mesh bots with inexpensive LoRa hardware. Both projects build decentralised text networks on LoRa radio technology. Under suitable conditions, messages can cover many kilometres across several nodes.
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Maya Posch tries out an old Intel Atom PC as an open router and shows how driver choice, installation and reliable measurements decide success. The Intel D2500CC board uses an Atom processor with two 1.8 GHz cores and initially two gigabytes of DDR3. OpenWrt’s generic x86 image did contain e1000, but not the required kmod-e1000e package.
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While building my mail archive, I found a folder with 6,594 emails that servers I was responsible for sent me between 2004 and 2025. Logwatch reports, cron output and warnings show how my server operations changed over twenty years. This post shows what this robot mail reveals, when it became a burden and how I would approach monitoring by email today.
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In September 2026 I merged Outlook, Thunderbird, Evolution and Cyrus mail from 26 years into a local mail archive running Stalwart and Roundcube. In the end there were 120,314 searchable emails, including more than 11,000 that had long been considered deleted. This post shows why Message-IDs do not detect duplicates, what Thunderbird really does when you delete something and how an archive can stay safe without any cloud.
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Andrew Gabbitas describes how Let’s Encrypt wants to enable post-quantum authentication with Merkle Tree Certificates without slowing down TLS connections with large individual signatures. An ML-DSA-44 signature is about 2,420 bytes. A current ECDSA P-256 signature, by contrast, needs 64 bytes.
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Johannes Findeisen criticises systemd as a complex, tightly coupled Linux suite and contrasts it with OpenRC, runit and s6 as more modular alternatives. The version examined was last updated on 25 July 2026. systemd uses units and cgroups for service and resource management.
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The Wikipedia article explains Occam’s razor as an economical rule of research that removes unnecessary assumptions without confusing simplicity with truth. Occam’s razor is a heuristic principle in the philosophy of science. It is not considered a criterion of truth in its own right.
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Linux CVE assignment is approaching 2,000 entries per kernel release, which changes how meaningful they are in practice.
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