Advent of Code 2025, solved in C
This year I took part in Advent of Code and solved each of the 12 puzzles in C. A few brief insights into the tasks and my thoughts on AoC 2025.
Projects
YourStats - my first app in the App Store!
After around 200 hours of writing software, my first app, YourStats, is now available in the Apple App Store. In this post, I’ll go into the background of the app and its features.
Qingping Air Monitor Light: Connected to InfluxDB in an Afternoon (feat. Docker)
In my pursuit of an open smart home, including self-built HomeKit accessories, I recently had a new idea: after already building my own air quality
Meross meets InfluxDB: A guide to importing energy consumption data from smart Meross plugs
When I moved to Hamburg, I finally had a chance to set up a proper smart home setup. In doing so, I followed this strategy:
From Algorithms to Farewells: The End of Chirpanalytica
It was a bold idea that emerged at JugendHackt in 2017: using artificial intelligence to analyze tweets and examine them for possible political backgrounds -
Apple HomeKit with the ESP8266 in One Evening: Making a Dropshipping Light Picture Smarthome-Compatible
For just under 15 euros, you can get light pictures from well-known dropshippers that gain their charm through backlighting. Unfortunately, the lighting can only be changed via a cumbersome inline cable remote. Time to change that and step into the world of Apple HomeKit.
Quo vadis, airplane? Monitoring air traffic movements with a DVB-T stick as an ADS-B receiver on x86 (with PiAware and fr24feed)
ADS-B is an airspace surveillance system that can also be picked up by regular people. If you then upload the collected data to certain platforms, you are rewarded with functions that would otherwise cost money.
Chirpanalytica: "Give me your Twitter name and I'll tell you which party you vote for"
What if you could automatically determine a person's political orientation just from a Twitter account? That's exactly the task I've been working on for the past two years.
The Mathboard Project
Finally cutting vegetables with sub-millimeter precision: an Ikea cutting board gets an upgrade
STS: Simple temperature measurement, built in one evening
After the TemperatUHR project had proven itself more than well, I built a small "sister project" one evening this week that also works without Wi-Fi.