> For the complete documentation index, see [llms.txt](https://px4.gitbook.io/px4-user-guide/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://px4.gitbook.io/px4-user-guide/development/middleware/msg_docs/powerbuttonstate.md).

# PowerButtonState

power button state notification message

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

```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_*

```