0x00 System Introduction
The newly released system includes a release note version description, which is placed in the user’s home directory. As the versions increase, it often becomes unclear which version of the system is currently in use. Therefore, a Release Note has been added, so you can know the current system version and what updates have been made based on the description. The new version has added 13 new software packages, mainly the compilation and installation of MAVROS related software packages, allowing the Raspberry Pi to connect to the PX4 flight controller.
Currently, the system has compiled a total of 284 ROS software packages, covering most commonly used ROS packages. If you find that the software package you need is missing during use, feel free to leave a message, and we can continue to add and compile other ROS packages in the next version.

0x01 System Download
The system can be downloaded from Baidu Cloud, and the download is free. You can try it out first, and if you are satisfied, you can purchase an activation code to activate the system. The trial can only be used for 6 power cycles, after which the ROS functionality will stop. At this point, the system can be used as a regular official Raspberry Pi system. The Baidu Cloud download link is as follows:
0x02 System Activation
On the same Raspberry Pi, using a valid activation code can activate all released Raspberry Pi ROS systems, whether it is the released Melodic system or the Kinetic system here. However, it is important to note that the activation code is bound to the Raspberry Pi mainboard. As long as it is the Raspberry Pi that was first activated, all subsequent Raspberry Pi ROS version upgrades can be used freely.
If you change the Raspberry Pi mainboard, you will need to purchase a new activation code to activate it. The activation steps are mostly similar, as shown in the following images:


0x03 Important Notes
0x04 Feedback
If you find any issues in the article, you can leave a message at the end of the article, or follow the official WeChat account of ROS Classroom and send me a message there to provide feedback. I basically handle messages in the WeChat account every day! Of course, if you want to give a tip to ROS Classroom, I would greatly appreciate it. A tip of 30 yuan will also invite you to join the ROS Classroom WeChat group to learn and communicate with more like-minded partners!