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50 lines
2.0 KiB
Markdown
50 lines
2.0 KiB
Markdown
---
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pageClass: is-wide-page
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---
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# Event (UORB message)
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Events interface.
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**TOPICS:** event
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## Fields
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| Name | Type | Unit [Frame] | Range/Enum | Description |
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| --------------------------------------------- | ----------- | ------------ | ---------- | ------------------------------------------------------ |
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| <a id="fld_timestamp"></a>timestamp | `uint64` | | | time since system start (microseconds) |
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| <a id="fld_id"></a>id | `uint32` | | | Event ID |
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| <a id="fld_event_sequence"></a>event_sequence | `uint16` | | | Event sequence number |
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| <a id="fld_arguments"></a>arguments | `uint8[25]` | | | (optional) arguments, depend on event id |
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| <a id="fld_log_levels"></a>log_levels | `uint8` | | | Log levels: 4 bits MSB: internal, 4 bits LSB: external |
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## Constants
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| Name | Type | Value | Description |
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| ----------------------------------------------- | -------- | ----- | ----------- |
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| <a id="#MESSAGE_VERSION"></a> MESSAGE_VERSION | `uint32` | 1 |
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| <a id="#ORB_QUEUE_LENGTH"></a> ORB_QUEUE_LENGTH | `uint8` | 16 |
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## Source Message
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[Source file (GitHub)](https://github.com/PX4/PX4-Autopilot/blob/main/msg/versioned/Event.msg)
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::: details Click here to see original file
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```c
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# Events interface
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uint32 MESSAGE_VERSION = 1
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uint64 timestamp # time since system start (microseconds)
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uint32 id # Event ID
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uint16 event_sequence # Event sequence number
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uint8[25] arguments # (optional) arguments, depend on event id
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uint8 log_levels # Log levels: 4 bits MSB: internal, 4 bits LSB: external
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uint8 ORB_QUEUE_LENGTH = 16
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```
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:::
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