I repeat myself like an old scratched LP, you should build your smart-home around an open standard like KNX[0] which is supported by 100's of hardware vendors,

I repeat myself like an old scratched LP, you should build your smart-home around an open standard like KNX[0] which is supported by 100's of hardware vendors, many software vendors including OSS and can fully run without any kind of server. [0]: https://knx.org/ https://knx.org/