I approach this topic, since, perhaps, I am running into the same trouble as the original author of the current thread…
Currently, I am performing SITL (Software in the Loop) simulations with conventional fixed wing aircraft (no VTOL/STOL). I connect a 6DOF (degrees of freedom) aircraft physical model ( developed in SIMULINK ) with Mission Planner and with autopilot firmware (ArduPlane.exe). In general, this executable can be downloaded from the Simulation tab in the Mission Planner, after selecting the desired “Model” and “Firmware” types.
My ultimate goal is to tune the PID gains of the autopilot control system so that the aircraft flies well. However, here I must emphasize that I am interested in the autopilot control system ( schematics at the end ) from releases 4.0.9 , 4.0.8, etc … (prior to the 4.1.0 build)
Following the discussion here, my understanding is that, unfortunately, it is not possible to download the 4.0.9 build from the Simulation tab in Mission Planner. It seems that for some reason it only downloads the new build 4.1.0, or I am wrong?
So, I hope that it should be fine to attempt to compile the 4.0.9 ArduPlane.exe for myself. However, I do not have a clue exactly which files I need to download from ?here? so that I can do the compilation.
Thank you very much for the attention and help, in advance!
All the best!