I created a post about how to setup an Android device running WallPanel to voice state changes (TTS) for specific entities using Node-RED.
I mainly wanted it to voice whenever doors/windows in my house open/close so I know if someone breaks in or not while I am here. It has also been helpful in knowing if my garage door successfully closed or not without having to wait for it.
Check out my post for more information:
I also have other posts about HA and Node-RED:
Hope you guys find this useful!