Hi pizman82
I accept your admonition and acknowledge that I am a reckless adventurer.

Good learning opportunities come from mistakes.
My GPS is a chassis built around a little screen that displays the stock GPS window of the Baron. This chassis carries the buttons etc that are placed around the screen to look like the one in the GPS window. So its not an addon so much as a "button-box".
Unless you mean that the Coronado Baron is an addon. In which case the inputs and outputs are restricted to whatever events are made available in their model.
Searching through the various forums I came across some interesting posts which led me to believe that by using a Macro file with a program called FSUIPC you can operate commands not normally available through the standard Sim.
Am I right in assuming that this would be a 3 strep process?
1. I make a macro file then put it into the P3D “Modules” folder.
2. Assign a key in FSUIPC to that macro and
3. Use that key in Mobiflight.
To do this I went to the P3D root directory and opened the “Modules” folder expecting to find a folder called 'Example LUA Plugins'. It wasn’t there. So, I found it somewhere else and put it there. From within that I found the macro called 'log lvars.lua' and copied it in to the Modules folder. This I thought, would make it visible to FSUIPC and therefore, usable.
Next, I started up P3D in windows mode and started a flight, then opened FSUIPC to set a key for each of these two commands in the control list:
• 'Lua log LVars' and
• ‘LuaKillAll’
'Lua log LVars' was not in the list although the second one was.
At that point I was out of ideas.
So, you can see; I have tried hard.
Perhaps I should try reinstalling the Lua plugin?
Your comment and guidance would be appreciated.
Thanks