> ## Documentation Index
> Fetch the complete documentation index at: https://darkgrade.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Nikon Operations

## ISOAutoControl (`0xd054`)

ISO sensitivity settings – Auto ISO sensitivity control

**Datatype:** UINT8

**Access:** GetSet

**Codec Type:** Enum Codec

### Valid Values

| Value | Name | Description               |
| ----- | ---- | ------------------------- |
| `0x0` | OFF  | Auto ISO control disabled |
| `0x1` | ON   | Auto ISO control enabled  |

***

## GetPartialObjectEx (`0x9431`)

Get partial object with 64-bit offset support (extension of GetPartialObject)

**Data Direction:** out

### Operation Parameters

| Parameter        | Required | Description                             |
| ---------------- | -------- | --------------------------------------- |
| **ObjectHandle** | ✓        | Object handle                           |
| **OffsetLower**  | ✓        | Offset in bytes (lower 32 bits)         |
| **OffsetUpper**  | ✓        | Offset in bytes (upper 32 bits)         |
| **MaxSizeLower** | ✓        | Maximum bytes to return (lower 32 bits) |
| **MaxSizeUpper** | ✓        | Maximum bytes to return (upper 32 bits) |

### Response Parameters

| Parameter                | Required | Description                       |
| ------------------------ | -------- | --------------------------------- |
| **ActualBytesSentLower** | ✓        | Actual bytes sent (lower 32 bits) |
| **ActualBytesSentUpper** | ✓        | Actual bytes sent (upper 32 bits) |

***

## GetDevicePropDescEx (`0x943a`)

Get device property descriptor (4-byte extension)

**Data Direction:** out

**Codec Type:** Custom Codec

### Operation Parameters

| Parameter          | Required | Description                                            |
| ------------------ | -------- | ------------------------------------------------------ |
| **DevicePropCode** | ✓        | Property code to get descriptor for (4-byte extension) |

### Response Parameters

None

***

## GetDevicePropValueEx (`0x943b`)

Get device property value (4-byte extension)

**Data Direction:** out

### Operation Parameters

| Parameter          | Required | Description                             |
| ------------------ | -------- | --------------------------------------- |
| **DevicePropCode** | ✓        | Property code to get (4-byte extension) |

### Response Parameters

None

***

## SetDevicePropValueEx (`0x943c`)

Set device property value (4-byte extension)

**Data Direction:** in

### Operation Parameters

| Parameter          | Required | Description                             |
| ------------------ | -------- | --------------------------------------- |
| **DevicePropCode** | ✓        | Property code to set (4-byte extension) |

### Response Parameters

None

***

## DeviceReady (`0x90c8`)

Check status of activation-type command (e.g. StartLiveView, AfDrive)

**Data Direction:** none

### Operation Parameters

None

### Response Parameters

None

***

## StartLiveView (`0x9201`)

Start remote live view mode (activation-type command)

**Data Direction:** none

### Operation Parameters

None

### Response Parameters

None

***

## EndLiveView (`0x9202`)

End remote live view mode

**Data Direction:** none

### Operation Parameters

None

### Response Parameters

None

***

## GetLiveViewImageEx (`0x9428`)

Get live view image with metadata (LiveViewObject with version)

**Data Direction:** out

**Codec Type:** Custom Codec

### Operation Parameters

None

### Response Parameters

None

***

## StartMovieRecord (`0x920a`)

Start video recording (only accepted during live view)

**Data Direction:** none

### Operation Parameters

None

### Response Parameters

None

***

## EndMovieRecord (`0x920b`)

End video recording

**Data Direction:** none

### Operation Parameters

None

### Response Parameters

None

***

## ChangeCameraMode (`0x90c2`)

Switch between PC camera mode and remote mode

**Data Direction:** none

### Operation Parameters

| Parameter | Required | Description |
| --------- | -------- | ----------- |
| **Mode**  | ✓        | Camera mode |

**Mode values:**

| Value | Name       | Description                                                               |
| ----- | ---------- | ------------------------------------------------------------------------- |
| `0x0` | PC\_CAMERA | PC Camera Mode: host commands ignored and uses settings from dial/buttons |
| `0x1` | REMOTE     | Remote Mode: all dials/buttons ignored and uses commands from host        |

### Response Parameters

None

***

## ChangeApplicationMode (`0x9435`)

Switch application mode on/off

**Data Direction:** none

### Operation Parameters

| Parameter | Required | Description      |
| --------- | -------- | ---------------- |
| **Mode**  | ✓        | Application Mode |

**Mode values:**

| Value | Name | Description                                                       |
| ----- | ---- | ----------------------------------------------------------------- |
| `0x0` | OFF  | disallows image playback, deletion, video recording on the camera |
| `0x1` | ON   | allows image playback, deletion, video recording on the camera    |

### Response Parameters

None

***