Prerequisites

Library 2.0.X
 

ESP8266 specific

• ESP8266 core for Arduino == 2.4.2 (don't use 2.5.0 or the beta's)
• Async TCP Library for ESP8266

ESP32 specific

• Arduino core for the ESP32 >= 1.0.0
• Async TCP Library for ESP32

Library 2.1.0

ESP8266 specific

• ESP8266 core for Arduino >= 2.5.2
• Async TCP Library for ESP8266

ESP32 specific

• Arduino core for the ESP32 >= 1.0.2
• Async TCP Library for ESP32

ESP8266 and ESP32

• Arduino IDE >= 1.8.5
• Async Web Server

Arduino IDE Installation Tips!
For both the Async TCP & Webserver libraries the easiest way to install is by downloading (Clone or Download > Download ZIP) and copying the contents to your Arduino Libraries folder.

• Windows: C:\\Users\\ < username > \\Documents\\Arduino\\libraries
• OSX: /Users/<username>/Documents/Arduino/libraries/
• On Linux it is typically located in /home/ < username > /sketchbook/libraries

In the following wiki pages we assume you have some previous experience with programming esp's and know how to set your board up for flashing firmware. If you don't checkout one of the following links:

• Peter P's Beginner's Guide to the ESP8266
• EEVblog #998 - How To Program ESP8266 WiFi With Arduino
• Andreas Spiess #214 New: Easier ESP32 installation in Arduino IDE (How to)