An alternative solution (if you wanna tinker) would be like what PX4 1.12 on Scorpion 80 HD whoop (w. Mamba f405 mini mk2) - #8 by taileron mentioned. BUT PLEASE GET AN RECEIVER thats the basic component of flight stack.
- Get a ESP01 or the ESP8266, or a wifi module, you can flash ArduPilot firmware : /Tools/MAVESP8266/2019-01-23 with GitHub - espressif/esptool: Espressif SoC serial bootloader utility to the board.
- Connect your phone to the
pixracer
wifi address. - Download
QGroundControl
on iphone or android. - Enable
Virtual Joystick
read more over here Virtual Joystick (PX4) ยท QGroundControl User Guide - Use arm/disarm and change mode over QGC, and please check functionality first before flying.