Wejn.org wejn.org

Wejn's corner on the interwebs, containing articles about computers (Linux), programming, system administration, and whatever else takes my fancy.

Replacing APC Smart-UPS SC450RM battery
wejn.org·3d
Leveling the Průša Core One+ bed
wejn.org·6w
Swisscom 2025 security.txt challenge: full writeup
wejn.org·15w
Visualize those pesky rainbows (interactively)
wejn.org·17w
On the unreasonable difficulty of plotting pretty rainbow, fast
wejn.org·18w
Overengineering float serialization for no good reason
wejn.org·20w
Designing a 3d-printed clasp for a sports gear bag
wejn.org·28w
LLM: Write production-ready code!
wejn.org·29w·Hacker News
Accidentally solving the Swisscom 2025 security.txt challenge
wejn.org·33w
Failing to calibrate flame-s-vis-nir-es spectrometer
wejn.org·41w
Philips Hue White Ambiance is actually terrible…
wejn.org·43w·Hacker News
Torch Bearer Spectroscope UI
wejn.org·45w
ESP32 as a Zigbee console
wejn.org·51w
Final stretch for e32wamb: PCB, cables, antenna holder
wejn.org·53w
Introducing e32wamb: firmware for esp32-c6 based White Ambiance light
wejn.org·60w
Testing ESP32’s LEDC “non-blocking” fading
wejn.org·61w
How-To: timestamp and git-hash version esp32 firmware builds
wejn.org·63w
Zigbee: Hue-llo world!
wejn.org·71w
Hue Engine: Reversing the PWM functions
wejn.org·73w
Hue Engine: Dumping the PWM data
wejn.org·74w

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