simconnect.TransmitClientEvent Help

bernb · 25 Aug 2020

I have this C# code taken from the P3d sdk and adapted to run in FSX with Simconnect.

The code works for the Pause/Unpause and I am able to use it to Pause / Unpause FSX with the status output to the console.
However with the code to set the GearUp/Gear Down does not work. The program recognises the words "GEAR UP" and "GEAR DOWN" and prints them to the console but the gear of the a/c in FSX do not go up or down.

I an not very familiar with C# so if someone can tell me what the problem is and how to fix it that would be great.

Thanks
Here is the code:

C#:

// Copyright (c) 2010-2019 Lockheed Martin Corporation. All rights reserved.
// Use of this file is bound by the PREPAR3D® SOFTWARE DEVELOPER KIT END USER LICENSE AGREEMENT

// Managed Voice Controls
/*
Use T to toggle the Voice control OFF/ON while console has focus
Say PAUSE to pause FSX
Say UNPAUSE to unpause FSX
 */

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Speech;
using System.Speech.Synthesis;
using System.Speech.Recognition;
using System.Windows.Forms;

using Microsoft.FlightSimulator.SimConnect;
using System.Runtime.InteropServices;

namespace Managed_Voice_Controls
{
    class ManagedVoiceControls
    {
        enum EVENTS
        {
            UNPAUSE = 0,
            PAUSE,
            GEARUP,
            GEARDOWN
        };

        Dictionary<string, EVENTS> phrases = new Dictionary<string, EVENTS>()
        {
            //{ "pause prepared", EVENTS.PAUSE },
           // { "unpause prepared", EVENTS.UNPAUSE }

            { "pause", EVENTS.PAUSE },
            { "unpause", EVENTS.UNPAUSE },
            { "gear up", EVENTS.GEARUP },
            { "gear down", EVENTS.GEARDOWN }
        };

        enum GROUPID
        {
            FLAG = 2000000000,
        };

        SimConnect simconnect = null;
        GrammarBuilder grammarBuilder = null;
        SpeechRecognitionEngine recognitionEngine = null;
        bool bVoiceRecognitionEnabled = true;
        bool done = false;
        const int WM_USER_SIMCONNECT = 0x0402;

        public IntPtr Handle { get; private set; }

        public ManagedVoiceControls()
        {
        }

        public void Run()
        {
            Connect();
            BuildGrammar();
            Listen();
        }

        public void Connect()
        {
            try
            {
                simconnect = new SimConnect("Managed Voice Control", this.Handle, WM_USER_SIMCONNECT, null, 0);
                simconnect.MapClientEventToSimEvent(EVENTS.PAUSE, "PAUSE_ON");
                simconnect.MapClientEventToSimEvent(EVENTS.UNPAUSE, "PAUSE_OFF");

                simconnect.MapClientEventToSimEvent(EVENTS.GEARUP, "GEAR_UP");
                simconnect.MapClientEventToSimEvent(EVENTS.GEARDOWN, "GEAR_DOWN");
                         }
            catch (Exception ex)
            {
                Console.WriteLine("Sim Connect unable to connect to FSX!\n\n{0}\n\n{1}", ex.Message, ex.StackTrace);
            }
        }

        public void BuildGrammar()
        {
            grammarBuilder = new GrammarBuilder();
            recognitionEngine = new SpeechRecognitionEngine();
            Choices phraseChoices = new Choices();

            foreach (KeyValuePair<string, EVENTS> i in phrases)
            {
                phraseChoices.Add(i.Key);
            }

            grammarBuilder.Append(phraseChoices);
            Grammar grammar = new Grammar(grammarBuilder);

            recognitionEngine.SetInputToDefaultAudioDevice();
            recognitionEngine.LoadGrammar(grammar);
        }

        public void Listen()
        {
            recognitionEngine.SpeechRecognized += new EventHandler<SpeechRecognizedEventArgs>(OnSpeechRecognized);
            recognitionEngine.RecognizeAsync(RecognizeMode.Multiple);

            while (!done)
            {
                string key = Console.ReadKey(true).Key.ToString();

                if (key.ToUpper() == "T")
                {
                    ToggleVoiceRecognition();
                }
            }
        }

        public void ToggleVoiceRecognition()
        {
            if (bVoiceRecognitionEnabled)
            {
                recognitionEngine.RecognizeAsyncStop();
                bVoiceRecognitionEnabled = false;
                Console.WriteLine("Voice recognition disabled\n");
            }
            else
            {
                recognitionEngine.RecognizeAsync(RecognizeMode.Multiple);
                bVoiceRecognitionEnabled = true;
                Console.WriteLine("Voice recognition enabled\n");
            }
        }

        public void OnSpeechRecognized(object sender, SpeechRecognizedEventArgs e)
        {
            if (e.Result.Confidence < .90 || !bVoiceRecognitionEnabled)
            {
                return;
            }

            switch (phrases[e.Result.Text])
            {
                case EVENTS.PAUSE:
                    simconnect.TransmitClientEvent((uint)SimConnect.SIMCONNECT_OBJECT_ID_USER, EVENTS.PAUSE, (uint)0, GROUPID.FLAG, SIMCONNECT_EVENT_FLAG.GROUPID_IS_PRIORITY);
                    Console.WriteLine("Pausing FSX\n");
                    break;

                case EVENTS.UNPAUSE:
                    simconnect.TransmitClientEvent((uint)SimConnect.SIMCONNECT_OBJECT_ID_USER, EVENTS.UNPAUSE, (uint)0, GROUPID.FLAG, SIMCONNECT_EVENT_FLAG.GROUPID_IS_PRIORITY);
                    Console.WriteLine("Unpausing FSX\n");
                    break;

                case EVENTS.GEARUP:
                    simconnect.TransmitClientEvent((uint)SimConnect.SIMCONNECT_OBJECT_ID_USER, EVENTS.GEARUP, (uint)0, GROUPID.FLAG, SIMCONNECT_EVENT_FLAG.GROUPID_IS_PRIORITY);
                    Console.WriteLine("Gear Up FSX\n");
                    break;
                  
                case EVENTS.GEARDOWN:
                    simconnect.TransmitClientEvent((uint)SimConnect.SIMCONNECT_OBJECT_ID_USER, EVENTS.GEARDOWN, (uint)0, GROUPID.FLAG, SIMCONNECT_EVENT_FLAG.GROUPID_IS_PRIORITY);
                    Console.WriteLine("Gear Down FSX\n");
                    break;

                default:
                    break;
            }
        }

        public void clearGrammar()
        {
            recognitionEngine.UnloadAllGrammars();
        }
    }
}

bernb · 25 Aug 2020

OK an update

I added this to the code after the other enum declaration:

C#:

 public enum hSimconnect : int
        {
            group1
        }

and changed the simconnect.TransmitClientEvent to this:

Code:

                case EVENTS.GEARUP:
                    simconnect.TransmitClientEvent(SimConnect.SIMCONNECT_OBJECT_ID_USER, EVENTS.GEARUP, 0, hSimconnect.group1 , SIMCONNECT_EVENT_FLAG.GROUPID_IS_PRIORITY);
                    Console.WriteLine("Gear Up FSX\n");
                    break;
                  
                case EVENTS.GEARDOWN:
                    simconnect.TransmitClientEvent((uint)SimConnect.SIMCONNECT_OBJECT_ID_USER, EVENTS.GEARDOWN, (uint)0, hSimconnect.group1, SIMCONNECT_EVENT_FLAG.GROUPID_IS_PRIORITY);
                    Console.WriteLine("Gear Down FSX\n");
                    break;

and now the voice commands work - prints to the console and the gears actually go up/down, So can anyone explain why this works and the initial code did not?

simconnect.TransmitClientEvent Help

bernb

bernb