This tutorial shows how to build an ESP32 web server that displays a web page with multiple sliders. The sliders control the duty cycle of different PWM channels to control the brightness of multiple LEDs. Instead of LEDs, you can use this project to control DC motors or other actuators that require a PWM signal. The communication between the clients and the ESP32 is done using WebSocket protocol. Additionally, whenever there’s a change, all clients update their slider values simultaneously.