Matter is the new home automation standard coming at the end of the year from Google, Apple, Amazon and about a hundred more companies. Matter will let you control your lights, door lock, thermostat, TV, etc. With an appropriate library Expo apps can also participate in Matter. https://www.wired.com/story/what-is-matter/

The corporate developers from Google, Apple and Amazon are completely ignoring React Native and instead are focusing on platform native applications. A native JNI library for Android already exists. https://github.com/project-chip/connectedhomeip/tree/master/src/android/CHIPTool These is also an IOS one: https://github.com/project-chip/connectedhomeip/tree/master/src/darwin/CHIPTool What is missing is the react-native wrapper bringing these two libraries together and defining a common Javascript API.

Hopefully there are some react-native experts here who can write this wrapper and submit it as a PR thus encouraging the Matter folk to also support React developers. Bonus if the library also supports node.js

The IOS and Android libraries are generated from a templating system. IOS: https://github.com/project-chip/connectedhomeip/tree/master/src/darwin/Framework/CHIP/templates Android: https://github.com/project-chip/connectedhomeip/tree/master/src/controller/java/templates Similar templates could be used to generate the Javascript wrapper.