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# PowerButtonState (UORB message)

power button state notification message.

**TOPICS:** power_button_state

## Fields

| Name      | Type     | Unit [Frame] | Range/Enum | Description                            |
| --------- | -------- | ------------ | ---------- | -------------------------------------- |
| timestamp | `uint64` |              |            | time since system start (microseconds) |
| event     | `uint8`  |              |            | one of PWR*BUTTON_STATE*\*             |

## Constants

| Name                                                                              | Type    | Value | Description                                                             |
| --------------------------------------------------------------------------------- | ------- | ----- | ----------------------------------------------------------------------- |
| <a id="#PWR_BUTTON_STATE_IDEL"></a> PWR_BUTTON_STATE_IDEL                         | `uint8` | 0     | Button went up without meeting shutdown button down time (delete event) |
| <a id="#PWR_BUTTON_STATE_DOWN"></a> PWR_BUTTON_STATE_DOWN                         | `uint8` | 1     | Button went Down                                                        |
| <a id="#PWR_BUTTON_STATE_UP"></a> PWR_BUTTON_STATE_UP                             | `uint8` | 2     | Button went Up                                                          |
| <a id="#PWR_BUTTON_STATE_REQUEST_SHUTDOWN"></a> PWR_BUTTON_STATE_REQUEST_SHUTDOWN | `uint8` | 3     | Button went Up after meeting shutdown button down time                  |

## Source Message

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

::: details Click here to see original file

```c
# power button state notification message

uint64 timestamp			    # time since system start (microseconds)

uint8 PWR_BUTTON_STATE_IDEL = 0             # Button went up without meeting shutdown button down time (delete event)
uint8 PWR_BUTTON_STATE_DOWN = 1             # Button went Down
uint8 PWR_BUTTON_STATE_UP = 2               # Button went Up
uint8 PWR_BUTTON_STATE_REQUEST_SHUTDOWN = 3 # Button went Up after meeting shutdown button down time

uint8 event                                 # one of PWR_BUTTON_STATE_*
```

:::