For various projects where a long runtime with batteries is important I use a modify Arduino Pro Mini 328 3.3V/8Mhz (ATmega328P). As an example a flashing sketch is used, which turns the LED on for 1 second and off for 8 seconds. [Read More]

On a docker project where i had to add gnupg keys i always got an error keyserver receive failed: Connection refused. After a while of troubleshooting, i realized it’s not a connection or DNS problem. But that the Dirmngr did not use the configured DNS servers of the system. gpg... [Read More]

Github currently supports hardware security keys (SoloKeys, Yubico, …) as second factor only with Google Chrome but not with Firefox, although Firefox supports U2F and on other sites this also works flawlessly. This browser doesn’t support the FIDO U2F standard yet. [Read More]

A small blog entry how to use MQTT in Powershell, as a library I use M2MQTT. [Read More]

If you don’t want your bookmarks, tabs, cronics, … to be stored by Firefox in the Firefox cloud, you can run your self-hosted Firefox Sync server. After that, only the Mozilla-hosted accounts server (https://accounts.firefox.com) is used, but the data is stored locally. [Read More]