HITL workflow with RealFlight and Pixhawk 4 (HIL_MODE missing in recent firmware)

Hello,

I’m currently on a project where I need to validate a control loop using HITL with a Pixhawk4 and RealFlight (via FlightAxis). My goal is to have the Pixhawk4 running the flight control code, while RealFlight handles the physics/environment.
But I’ve noticed that when I flash the latest ArduPlane version v4.6.3, the parameter HIL_MODE does not exist. If I downgrade to Arduplane v4.0.9, the HIL_MODE parameter appears.

What is the current standard workflow for HITL on newer versions of firware? Was HITL deprecated or removed?

Thanks in advance.

The feature to which you refer has been deprecated for quite some time. See here for current guidance: