To install PX4 firmware (for moment only the quad is available).

Connect your Erle-Brain2 to internet, open one terminal and execute the following commands:

sudo apt-get update
sudo apt-get install px4-erle-robotics

Open a terminal and type the following:

sudo apt-get purge -y px4-erle-robotics

Note: Before install PX4 package please uninstall other apm package. Please, be careful with PX4, for the moment is beta.