Throttle Percent LVAR/Offset Formatting Issue

[AmeenGuy]

Hi,
I made a post recently regarding tracking the c172's throttle percentage to which I was told to look at the Offset/LVAR listing for the throttle command to implement.
The command is: (L:Throttle1Position,percent)

I had tried replacing the old command in the code_s.xml file that came with the c172 model, and noticed some changes, but not proper changes. My program was still yielding some rather spontaneous numbers.

How should I go about implementing the correct Offset/LVAR for the throttle, and what syntax should I use?

Thanks for the help!

[Nick - A2A]

Hello,

Please can you give us a bit more info about which software you're interfacing with here. I assume this is a home cockpit built of some sort, but I'm a bit unclear as to what you're trying to achieve.

Thanks,
Nick

[AmeenGuy]

I am using the Prepar3D app, and am trying to properly monitor the throttle lever percentage every second using a simconnect add on program in C++. However, I keep getting spontaneous numbers. One of the members had told me I was using the improper Offset/LVAR and gave me a list for them. I am just unsure of the syntax or location I would need to implement the proper throttle LVAR into my program. I tried editing the code_s.xml file, which slightly change the results, but not to properly tracking the throttle lever percentage.

[Nick - A2A]

Okay, thanks but I'm still a bit unclear: are you writing software in C++ to interface to the Accu-Sim C172, or is this third-party software which you've obtained from elsewhere?

Thanks,
Nick

[AmeenGuy]

I am writing my own code in C++ using similar formatting to the SimConnect API, to interface to the C172.

Thanks.

[Nick - A2A]

Please can you give us a bit more information about the software you're writing AmeenGuy: what it does and who it's intended for?

Thanks,
Nick

[AmeenGuy]

I am trying to track the C172's throttle percentage in Prepar3d by using some SimConnect commands. In short, the program requests data every second from the Prepar3D server about the throttle percentage of the airplane. I am using the AddToDataDefinition function with parameters "GENERAL ENG THROTTLE LEVER POSITION:1" and "Percent over 100" . This program works for all of the P3D default airplanes, but not for the A2A C172R add-on plane. The C172R model yields a few random number when the engine is off. When the engine is on, it seems to spit out rather spontaneous numbers, each one different than the number from the previous second, rather than the actual throttle's percent.

Right now I just need to printout the throttle lever's percentage every second to the console.
After I get the proper results, I intend to expand on this and create a step-by-step guide to helping a new pilot start and take-off with the C172 model.

[some1 - A2A]

The (L:Throttle1Position) is a local simulation variable. You can access it from XML or C++ gauge, but you can't access it remotely from Simconnect, at least not directly. You would need some custom code on the simulator side, that reads the variable and sends the value at another app either using Siconnect custom data feature, or TCP/IP, pipes, etc.

[AmeenGuy]

How would I best approach completing this task?

Thanks.