I am new to ESP8266 boards and IoT programming and I don't know how to describe better what I want to do without a picture.
Question: How to send continuous data from 4 esp8266 WiFi clients to a webpage or to an application which handles all of them in parallel without introducing noticeable delays?
So, I need 4 clients (users), each having an ESP8266 ESP-12E NodeMcu CP2102 board with 3 sensors (analog /digital sensors). These nodes should send continuous data or at least faster than human average reaction time (i.e. 250ms). These clients should behave as players do in a multiplayer online game for example. Or I don't know, maybe like 4 WiFi Gaming Controllers.
I need the system to be very reactive (without having a noticeable delay in displaying the data). For example, if User4 touches the Sensor3 (which can be also a simple button), the webpage / the application should sense this immediately while still displaying/handling the data from the other users. That's why I want to send the data to the webpage or to the application (C# app or Android App) as a long string even though some users are inactive or if their sensors inputs didn't change during a frame.
Sensor1 can be a pulse sensor, Sensor2 a microphone and sensor3 a button or a touch sensor. It doesn't matter so much and I'm not decided yet on this.
My problem is that I don't know how to approach this. I did some tutorials with WebSockets and one tutorial with MQTT, but I'm still very, very confused. I don't know if it's possible.
One WebSocket tutorial I've followed is this one (I also found some typos in the code):