TMD Sender

777Driver · June 30, 2026 at 7:50 AM

Has anyone successfully gotten the TMD sender to work when you press a button in the cockpit? I am trying to output the Flight Data Recorder button position; I am running a small PowerShell script to monitor any outputs, it doesn't seem to work for any custom buttons or switches.

<[event_edge_rising][RecorderGroundControlResetWithFirstEngineStarted][]
<[string8][Input][AnyEngineRunning.Output]>
<[float64][Value][1.0]>
<[string8][Events][ RecorderGroundControlSwitch.Reset ]>
>
<[input_switch][RecorderGroundControlSwitch][]
<[string8][Message][Recorder.GroundControl]>
<[float64][Value][0.0]>
<[string8][Events] [ OverheadMiddleRightButtonSoundIn.Trigger ]>
<[string8][EventsRelease][ OverheadMiddleRightButtonSoundOut.Trigger ]>
>
<[output][RecorderGroundControl][]
<[string8][Input][RecorderGroundControlSwitch.Output]>
>

// RP EXTERNAL KEYPRESS / BRIDGE TRIGGER
// Uses existing RCDR GND CTL cockpit switch.
// Sends the switch state out for external tools such as RAAS/QAR/OBS helper.

<[sender][RPSenderRecorderGroundControl][]
<[string8][Input][RecorderGroundControlSwitch.Output]>
<[string8][Message][Aircraft.RPRecorderGroundControl]>
>

Jet-Pack (IPACS) · June 30, 2026 at 10:25 AM Official Post

Check that you're receiving the messages with the "State" message flag, not with event. Event is used when a control clickspot is pressed or when the user presses an assigned button on the keyboard and they are sent just once. State variables should be sent continuously just like aircraft position, velocity, heading, etc.

777Driver · June 30, 2026 at 11:22 PM

That works nicely; this opens up a huge number of options. Appreciate the help.

777Driver · July 1, 2026 at 12:58 AM

So I've hooked up my black box mod to the DFDR switch in the cockpit, and Runway awareness can be turned on or off with the ROW/ROP button on the overhead. This seems amazing for home cockpits.

Jet-Pack (IPACS) · July 1, 2026 at 7:08 AM Official Post

You can also send messages from the outside to the sim aircraft this way. Fast enough for any cockpit switches and levers but not quite fast enough for primary flight controls, those should be connected to the sim directly anyway.

SageMage · July 6, 2026 at 7:24 AM

Quote from Jet-Pack (IPACS)

You can also send messages from the outside to the sim aircraft this way. Fast enough for any cockpit switches and levers but not quite fast enough for primary flight controls, those should be connected to the sim directly anyway.

Any chance we can get the same functionality on Mac?

Anth5485 · July 6, 2026 at 12:59 PM

Quote from SageMage

Any chance we can get the same functionality on Mac?

I looked into it, and unfortunately there isn’t an alternative to DLLs right now. For my RAAS mod based on 777Driver , I use the UDP protocol instead, which lets the app read the simulator data without needing a DLL.

If you’re interested, I can send you the Mac version.

SageMage · July 6, 2026 at 5:10 PM

Quote from Anth5485

I looked into it, and unfortunately there isn’t an alternative to DLLs right now. For my RAAS mod based on 777Driver , I use the UDP protocol instead, which lets the app read the simulator data without needing a DLL.
If you’re interested, I can send you the Mac version.

Please send it to me, would be interested.

Are you packing the UDP via the tmd with the variables or you’re sending only the ForeFlight data?

TMD Sender

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