Help Needed: FSUIPC7 Offsets for Autopilot Mode in MSFS 2020 ??

[daniellljose]

Hi everyone,

I have been diving deeper into custom cockpit setups for MSFS2020 and using FSUIPC7 to interface with various hardware inputs. Things have gone smoothly so far.., but I have hit a snag trying to get precise control over autopilot modes—specifically toggling ALT HOLD, HDG, and VS modes.

I have gone through the offset documentation..., but I am either missing something or not applying it correctly. Has anyone here successfully mapped these AP functions using FSUIPC7 in MSFS2020? If so.., could you share which offsets you used, or if LUA scripts are more reliable for this kind of control: ??

I am not using LINDA, just pure FSUIPC7 and a custom interface with Arduino. Any guidance, examples, or even pointing out if I am approaching it wrong would be hugely appreciated. I have learned a ton from this community and trust your experience.

 

Thanks in advance and looking forward to any advice !!

Daniel

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[John Dowson]

5 hours ago, daniellljose said:

I have gone through the offset documentation..., but I am either missing something or not applying it correctly

For controls, you should start with the standard controls, not offsets. For example, the standard control for AP altitude hold would be the AP Alt Hold control (65726).
Note that the standard way to determine what control to use is for any button or switch to set logging for Events (Log->Events), open the logging console (Log->Open Console) and then toggle/set the switch in the virtual cockpit and see what is logged. If anything is logged, use that.

Note that many MSFS aircraft continually emit certain events, and these are different for each aircraft. These can make using the log difficult, so best to ignore these by setting the DontLogThese ini parameter (see the Advanced User guide for details).

Many MSFS aircraft, especially third party/add-ons, do not use the standard controls/events. For such aircraft, check to see if an MF preset is available - you can use the search interface on the MF HubHop site: https://hubhop.mobiflight.com/presets/. All MF presets should be available for use in FSUIPC7.
Some aircraft also use their own custom controls (e.g. PMDG, FSLabs, etc). For such aircraft, check the documentation - and there is a FAQ entry on using custom controls with PMDG aircraft. 

If there are no standard events, presets or custom controls that work, you can look at the available lvars or preset events, or examine the switch/button behavior to see what it is using - see the following article: https://www.badcasserole.com/uncovering-input-events-using-the-msfs2020-model-behavior-dialog/

If you require any further help, please let me know the aircraft you are using.

John