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# ArmingCheckReplyV0 (UORB message)

**TOPICS:** arming_check_reply_v0

## Fields

| Name                            | Type         | Unit [Frame] | Range/Enum | Description                                                              |
| ------------------------------- | ------------ | ------------ | ---------- | ------------------------------------------------------------------------ |
| timestamp                       | `uint64`     |              |            | time since system start (microseconds)                                   |
| request_id                      | `uint8`      |              |            |
| registration_id                 | `uint8`      |              |            |
| health_component_index          | `uint8`      |              |            | HEALTH*COMPONENT_INDEX*\*                                                |
| health_component_is_present     | `bool`       |              |            |
| health_component_warning        | `bool`       |              |            |
| health_component_error          | `bool`       |              |            |
| can_arm_and_run                 | `bool`       |              |            | whether arming is possible, and if it's a navigation mode, if it can run |
| num_events                      | `uint8`      |              |            |
| events                          | `EventV0[5]` |              |            |
| mode_req_angular_velocity       | `bool`       |              |            |
| mode_req_attitude               | `bool`       |              |            |
| mode_req_local_alt              | `bool`       |              |            |
| mode_req_local_position         | `bool`       |              |            |
| mode_req_local_position_relaxed | `bool`       |              |            |
| mode_req_global_position        | `bool`       |              |            |
| mode_req_mission                | `bool`       |              |            |
| mode_req_home_position          | `bool`       |              |            |
| mode_req_prevent_arming         | `bool`       |              |            |
| mode_req_manual_control         | `bool`       |              |            |

## Constants

| Name                                                                  | Type     | Value | Description |
| --------------------------------------------------------------------- | -------- | ----- | ----------- |
| <a id="#MESSAGE_VERSION"></a> MESSAGE_VERSION                         | `uint32` | 0     |
| <a id="#HEALTH_COMPONENT_INDEX_NONE"></a> HEALTH_COMPONENT_INDEX_NONE | `uint8`  | 0     |
| <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/px4_msgs_old/msg/ArmingCheckReplyV0.msg)

::: details Click here to see original file

```c
uint32 MESSAGE_VERSION = 0

uint64 timestamp # time since system start (microseconds)

uint8 request_id
uint8 registration_id

uint8 HEALTH_COMPONENT_INDEX_NONE = 0

uint8 health_component_index      # HEALTH_COMPONENT_INDEX_*
bool health_component_is_present
bool health_component_warning
bool health_component_error

bool can_arm_and_run              # whether arming is possible, and if it's a navigation mode, if it can run

uint8 num_events

EventV0[5] events

# Mode requirements
bool mode_req_angular_velocity
bool mode_req_attitude
bool mode_req_local_alt
bool mode_req_local_position
bool mode_req_local_position_relaxed
bool mode_req_global_position
bool mode_req_mission
bool mode_req_home_position
bool mode_req_prevent_arming
bool mode_req_manual_control


uint8 ORB_QUEUE_LENGTH = 4
```

:::