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This is UNOFFICIAL wiki of PX4 firmware!!!

Official wiki is located at https://pixhawk.org/

What is PX4 Firmware?

The software for the PX4 autopilot modules runs on top of the very efficient small system operating system NuttX, which provides a POSIX-style environment (i.e. printf(), pthreads, /dev/ttyS1, open(), write(), poll(), ioctl() etc).

Main layers:

• PX4 flight stack
• PX4 middleware - provides drivers and interfaces to the autopilot hardware

While the middleware is always needed to run the board, even external flight control software can be used, such as APM:Plane or APM:Copter, which have ported their software to run on the PX4 platform.

Purpose of PX4 Firware