Most effective way to transfer button state?

Question

What is the most effective or creative way to transfer a button state over the Internet to another machine?The consumer should know at ANY time if the button is pressed or released. (and if the connection is up)WebSocket, WebRTC, ...Thoughts?

timonoko · Accepted Answer

I have ESP-01 which transmits state of NINE buttons all over the world. https://github.com/timonoko/Wifi-remote-control