Preface Overview This document mainly introduces the development method based on AIO-3399PRO-JD4 platform. OS version Current version of the document Revision record V2.0.4 Update time: 2021-12-11 Update content: Supplement some pictures. Update the Android system compilation method and download link of "Screen Module". Fix the English translation and picture errors of "Upgrade from SD card". Add the EC20 GNSS function of "Wireless module". "Camera Module" Added CAM-8MS1M monocular camera module. V2.0.3 Update time: 2021-11-9 Update content: Added "Preface", which mainly describes product Wiki revision records and OS version. V2.0.2 Update time: 2021-10-30 Linux update content: Added "More Linux OS Support" to support more systems such as buildroot, yocto and debian. Add "More Technical Cases", and add "OpenSIP Build)" V2.0.1 Update time: 2021-10-29 Android update content: Driver -> LCD : Toshiba TC358775XBG support is added. Fix some download links.