If you are using @The_Pi_Hole to filter ads in your network, you need a redundant pi-hole setup. Dissimilar hardware at different locations, update the software not on both on the same day (in case the update breaks things). Run DHCP on both in parallel (this works!). pic.twitter.com/VSwbjevy8W

— Jan Zwiener (@jnz_jan) June 3, 2021

For embedded software with limited memory a stack overflow is one of the most common error sources. But it is actually possible to analyze the worst-case stack usage of a C program at compile time (https://t.co/aUiI5imcVM) if you don't use things like recursion or C99's VLAs.

— Jan Zwiener (@jnz_jan) May 23, 2021

For lighting during video conferences, I made a construction out of baking paper (as a diffuser), a few neodymium magnets for fastening and a Philips Hue LED lamp. The brightness and color temperature can be controlled from the Hue app. pic.twitter.com/SLvBksiCDi

— Jan Zwiener (@jnz_jan) May 2, 2021

Test your adblocker (e.g. Pi-hole) here: https://t.co/IBnG9du9Rx

— Jan Zwiener (@jnz_jan) May 2, 2021

Need to grep something on Windows? Use
findstr /spin "text" *.cpp
to search for text recursively in all .cpp files. If you arrange the parameters as a "spin", you can easily remember them.

— Jan Zwiener (@jnz_jan) April 26, 2021