Arduino HandBook 2 is a mobile directory for the Arduino platform developed by Oleksandr Dovhaliuk. This free application offers a comprehensive guide to Arduino and its features, including working with operators, data, functions, and various libraries. It is compatible with Android 9.0 and is listed under the Education & Reference category, specifically under Books.

The application is an excellent resource for beginners who are just starting out with Arduino. It offers a specially developed introductory material that provides an easy-to-understand explanation of the platform. Additionally, the application provides a detailed description of the standard, Arduino Due, and Esplora libraries, making it a valuable tool for anyone looking to expand their knowledge of the platform.