Does the Aqara Light Switch H2 US work with HomeKit, Alexa, and Google Home?
In Thread mode, the Aqara Light Switch H2 US (WS-K02E, WS-K03E, WS-K04E) needs a Thread border router and Matter controller but no Aqara hub.
It uses native Matter over Thread, also supports Zigbee, and works with or without a neutral wire. It suits HomeKit, Google Home and Alexa users, with native support through Matter over Thread. Home Assistant users get native support through Zigbee.
Channels vary by model: WS-K02E is 2 buttons and 1 channel, WS-K03E is 2 buttons and 2 channels, WS-K04E is 4 buttons and 3 channels. 119 x 74 x 42 mm across the family.[6]
How the device gets into the platform on this route. The headline is the best route: local before cloud, direct before bridged, core before community. The methodology page lists every level.