https://www.matthias-jentsch.de/2014/12/10/threadpool-registerwaitforsingleobject-with-cancellationtokensource/https://www.matthias-jentsch.de/2014/12/28/the-morse-code-screwdriver/https://www.matthias-jentsch.de/2015/06/06/esp8266-first-steps/https://www.matthias-jentsch.de/2016/03/22/the-wi-fi-water-level-gauge-2-0-my-own-iot/https://www.matthias-jentsch.de/2017/02/16/on-chip-debugging-on-esp32-with-eclipse-and-openocd/https://www.matthias-jentsch.de/2017/12/10/mqtt-my-simple-switch-for-wardrobe-and-bed/