Screen Sharing over multiple devices via WiFi or WifiDirect

Screen Sharing over multiple devices via WiFi or WifiDirect

I want to develop an app where i can share my screen (presenter) to others
(viewers) over a wifi connection either by using wifi network with AP or
WiFi Direct technology (like Miracast ).
Better if there's no requirement of creating a host AP i.e. via WiFi
Direct. but if its not possible we can go for the hotspot option as well.
what will be the limit of participants?(i need it to be atleast 10)
The app is required for presenting ppts without using projector so i
thought this way if there's other way please mention.