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# LogMessage (UORB message)

A logging message, output with PX4_WARN, PX4_ERR, PX4_INFO.

**TOPICS:** log_message

## Fields

| 명칭        | 형식          | Unit [Frame] | Range/Enum | 설명                                                                          |
| --------- | ----------- | ---------------------------------------------------------------- | ---------- | --------------------------------------------------------------------------- |
| timestamp | `uint64`    |                                                                  |            | time since system start (microseconds)                   |
| severity  | `uint8`     |                                                                  |            | log level (same as in the linux kernel, starting with 0) |
| text      | `char[127]` |                                                                  |            |                                                                             |

## Constants

| 명칭                                                                                        | 형식      | Value | 설명 |
| ----------------------------------------------------------------------------------------- | ------- | ----- | -- |
| <a id="#ORB_QUEUE_LENGTH"></a> ORB_QUEUE_LENGTH | `uint8` | 4     |    |

## Source Message

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

:::details
Click here to see original file

```c
# A logging message, output with PX4_WARN, PX4_ERR, PX4_INFO

uint64 timestamp		# time since system start (microseconds)

uint8 severity # log level (same as in the linux kernel, starting with 0)
char[127] text

uint8 ORB_QUEUE_LENGTH = 4
```

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