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In-wall light switch recommendations
(lemmy.world)
Home Assistant is open source home automation that puts local control and privacy first. Powered by a worldwide community of tinkerers and DIY enthusiasts. Perfect to run on a Raspberry Pi or a local server. Available for free at home-assistant.io
Anyone in Australia, as an electrician, the best option is Clipsal Wiser switches, dimmers, relays etc.
Zigbee that defaults to standard push button operation when the network drops out.
If using HA you DO NOT need to purchase the hub that they say is required to use the switches.