Privately I am working a lot on home automation using HomeAssistant, ESPHome, Zigbee, Z-Wave, MQTT, NodeRed, evcc, SML etc. – you get an impression. Also programmed a few related Prometheus exporters.
I will write more once I find the time to document progress. Until then, please have a look at my Git repositories at https://github.com/kic68/ or find me on https://www.linkedin.com/in/torbenfrey/.