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# GpsInjectData (UORB message)

**TOPICS:** gps_inject_data

## Fields

| Name      | Type         | Unit [Frame] | Range/Enum | Description                                                               |
| --------- | ------------ | ------------ | ---------- | ------------------------------------------------------------------------- |
| timestamp | `uint64`     |              |            | time since system start (microseconds)                                    |
| device_id | `uint32`     |              |            | unique device ID for the sensor that does not change between power cycles |
| len       | `uint16`     |              |            | length of data                                                            |
| flags     | `uint8`      |              |            | LSB: 1=fragmented                                                         |
| data      | `uint8[300]` |              |            | data to write to GPS device (RTCM message)                                |

## Constants

| Name                                              | Type    | Value | Description |
| ------------------------------------------------- | ------- | ----- | ----------- |
| <a href="#ORB_QUEUE_LENGTH"></a> ORB_QUEUE_LENGTH | `uint8` | 8     |
| <a href="#MAX_INSTANCES"></a> MAX_INSTANCES       | `uint8` | 2     |

## Source Message

[Source file (GitHub)](https://github.com/PX4/PX4-Autopilot/blob/main/msg/GpsInjectData.msg)

::: details Click here to see original file

```c
uint64 timestamp		# time since system start (microseconds)

uint32 device_id                # unique device ID for the sensor that does not change between power cycles

uint16 len                       # length of data
uint8 flags                     # LSB: 1=fragmented
uint8[300] data                 # data to write to GPS device (RTCM message)

uint8 ORB_QUEUE_LENGTH = 8

uint8 MAX_INSTANCES = 2
```

:::