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ZigBee and Zwave?
(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
Zigbee/Z-Wave/Thread are all meant for sensors. WiFi not so much. It's easier to host more sensors on the purpose-built network types. Special consideration for Z-Wave since it uses different frequency than WiFi, which the others do not.
WiFi and batteries don't really go together, which also puts a real limit on what you can do there.