Explore ESP32 development with AJAX web integration using the TTGO T-DISPLAY in this comprehensive 25-minute tutorial. Learn to expand a basic temperature and humidity measurement project by adding wireless network functionality and a webserver. Follow step-by-step instructions to implement Javascript and associated support code, enabling remote viewing of sensor data through a web browser on computers or smartphones. Begin with a simple webserver setup, then progress to storing HTML efficiently, implementing mDNS support, and displaying network information on the device's screen. Discover how to create global variables, pass values to web pages, and use Javascript for asynchronous data requests. Address webserver limitations by installing and configuring the AsyncWebServer for ESP32. Enhance the web interface with temperature unit conversion and CSS styling. Gain practical experience in IoT development, Arduino programming, and web integration for maker projects.