Hi. We hope you’re doing well.
We just want to let you know that we just released a new version of the ESP32 eBook:

The new edition of the eBook is now available to all previous customers. Here’s how you can download the updated eBook:
- Login here: https://rntlab.com/courses/
- Click the Courses tab and select the “Learn ESP32 with Arduino IDE – 3rd Edition” eBook
- Press the yellow button “DOWNLOAD EBOOK VERSION 3.2 »”
What’s New in Version 3.2?
Installation of ESPAsyncWebServer and AsyncTCP
- We updated the instructions to install the latest version of the maintained forks of the ESPAsyncWebServer and AsyncTCP libraries by ESP32Async. These libraries are now available to install via Arduino IDE Library Manager.
Installation of the ESP32 Core
- We updated the installation of the ESP32 boards in the Arduino IDE. Now you don’t need to add the espressif URL on the Preferences menu.
Installation of ngrok software
- We updated the installation instructions for ngrok software to access your ESP32 web servers from anywhere.
Thanks for your support.
Rui Santos and Sara Santos