Let the fun begin.
Fresh from the post box. CC2231 flashed with coordinator software (at least that's what I ordered) so that I should now be able to connect to Zigbee HW from MQTT (and in turn from Node-Red) via the zigbee2mqtt bridge.
As I guess an appetizer in my order of the CC2531 they included this little beauty, a capacitive touch switch. This is really useful for potentially many Arduino/ESP8266 projects. Often better suited than a mechanical switch.
Here's a link from some random seller.
Fosstodon is an English speaking Mastodon instance that is open to anyone who is interested in technology; particularly free & open source software.