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+- Stapelberg wrote about this protocol, it looks cool and somehow I had not heard of it:
+  - https://michael.stapelberg.ch/posts/2022-10-09-remote-power-button/
+  - #go https://michael.stapelberg.ch/posts/2021-01-10-mqtt-introduction/
+  - https://michael.stapelberg.ch/posts/2021-03-13-smart-intercom-backpack/