Pixhawk Wiring Quickstart. If the first fails but the second succeeds then there is a problem with the DNS server that your RPi is attempting to use. Select the Gear icon Vehicle Setup in the top toolbar and then Radio in the sidebar. For Mac follow these instructions. Other flight controllers based on the Pixhawk FMUv2 architecture are available from other companies these share the same connections, outputs, functions, etc.
PX4 - PS4 Setup Diagram
On newer versions of Raspberry Pi 3 the uart serial connection may be disable by default.
Warning Do not connect any servos or other devices to the PWM outputs of your receiver. The firmware will then proceed through a number of upgrade steps downloading new firmware, erasing old firmware etc. Compass Configuration.