# IL-2 Sturmovik

## Connection Method

**UDP** — IL-2 Sturmovik sends telemetry data over UDP via its motion device and telemetry device interfaces.

* **Default IP**: `127.0.0.1`
* **Default Port**: `20888`

## Setup Steps

To enable telemetry output, edit the game's `data/startup.cfg` file and add the following two sections:

```
[KEY = motiondevice]
    addr = "127.0.0.1"
    decimation = 1
    enable = true
    port = 20888
[END]
[KEY = telemetrydevice]
    addr = "127.0.0.1"
    decimation = 1
    enable = true
    port = 20888
[END]
```

### Using alongside other telemetry software

If you use another application that also uses IL-2 telemetry data (like SimShaker), you can output to both the DRSM port and the default port **4321**:

```
[KEY = telemetrydevice]
	addr = "127.0.0.1"
	addr1 = "127.255.255.255:20888"
	decimation = 1
	enable = true
	port = 4321
[END]
[KEY = motiondevice]
	addr = "127.0.0.1"
	addr1 = "127.255.255.255:20888"
	decimation = 1
	enable = true
	port = 4321
[END]
```

## Available Telemetry

* **Orientation**: Pitch, Roll, Yaw
* **Acceleration**: Full 3-axis acceleration
* **Angular Velocity**: Rotation rates
* **Speed**: Airspeed
* **RPM**: Engine RPM
* **Altitude**: Above ground level

### Telemetry Quality: ★★★★☆

## Recommended Starting Settings

* **Primary Cue Gain**: 60–90%
* **Smoothing**: Low to medium
* **Washout**: Medium

## Known Quirks

* **Both motion and telemetry devices needed**: IL-2 has separate motion and telemetry data streams. Both sections must be added to `startup.cfg` for full telemetry coverage.
* **Decimation**: Setting `decimation = 1` sends every physics frame. Higher values skip frames.

## Troubleshooting

### No telemetry data

1. Verify both `[KEY = motiondevice]` and `[KEY = telemetrydevice]` sections are present in `data/startup.cfg`.
2. Ensure `enable = true` is set in both sections.
3. Check that the port matches DR Sim Manager's listen port (default `20888`).
4. Make sure you are in a mission flying an aircraft.


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