Open Sigfox Stack for STMicroelectronics S2-LP
Late last year I published librenard, an open-source Sigfox stack implementation based on my reverse engineered Sigfox specifications. In the meantime, Sigfo...
Projects
2019
2018
35C3 - Hunting the Sigfox: Wireless IoT Network Security
As part of my Bachelor’s thesis, I have been reverse engineering the Sigfox radio protocol for the last few months. I have published the reverse-engineered s...
2017
ESP32 + Dash Button + Alexa = Power Button
My home is already very cluttered with tech, so whenever possible, I like to have it get out of my way. But hiding my desktop computer poses the obvious prob...
ESP32 Range Testing
So I recently learned about the Friis equation and link budget calculation. When I tried to figure out what the theoretical maximum range of a 20dBm WiFi tra...
Transferring Mesecons to minetest-mods
On Christmas Eve 2011, more than 5 years ago, I published the first version of my “Mesecons” mod for the Minecraft clone “Minetest”. Mesecons adds digital el...
Reverse Engineering Furby Connect’s Bluetooth Protocol
Some of my earlist memories from being a toddler was my cousin having a Furby, so naturally I also really wanted to have one. When most children finally get ...
2016
od2samba4: Migrate from Apple Open Directory to Samba4 Active Directory
I work as an Administrator at one of my University’s computer pools with almost 1000 registered students where we employ a directory server for user manageme...
The Maths behind Spherical Voxel Planets
Have you ever wondered about the maths required to produce a spherical voxel planet? For the last week, I have been working on two YouTube videos on the (im)...
DIY Smartwatch Based on ESP8266
Once one gets rid of the shackles that the restriction to through-hole components puts on the electronics hobbyist, an entire new world of possibilites opens...
2015
Currency for a “Schule als Staat” Project
Last week, my school had a project called “Schule als EU” (school as EU) during which the whole school is organized just like the European Union, with autono...