---
pageClass: is-wide-page
---

# ManualControlSwitches (UORB message)

**TOPICS:** manual_control_switches

## Fields

| Name                     | Type     | Unit [Frame] | Range/Enum | Description                                                   |
| ------------------------ | -------- | ------------ | ---------- | ------------------------------------------------------------- |
| timestamp                | `uint64` |              |            | time since system start (microseconds)                        |
| timestamp_sample         | `uint64` |              |            | the timestamp of the raw data (microseconds)                  |
| mode_slot                | `uint8`  |              |            | the slot a specific model selector is in                      |
| arm_switch               | `uint8`  |              |            | arm/disarm switch: _DISARMED_, ARMED                          |
| return_switch            | `uint8`  |              |            | return to launch 2 position switch (mandatory): _NORMAL_, RTL |
| loiter_switch            | `uint8`  |              |            | loiter 2 position switch (optional): _MISSION_, LOITER        |
| offboard_switch          | `uint8`  |              |            | offboard 2 position switch (optional): _NORMAL_, OFFBOARD     |
| kill_switch              | `uint8`  |              |            | throttle kill: _NORMAL_, KILL                                 |
| termination_switch       | `uint8`  |              |            | trigger termination which cannot be undone                    |
| gear_switch              | `uint8`  |              |            | landing gear switch: _DOWN_, UP                               |
| transition_switch        | `uint8`  |              |            | VTOL transition switch: \_HOVER, FORWARD_FLIGHT               |
| photo_switch             | `uint8`  |              |            | Photo trigger switch                                          |
| video_switch             | `uint8`  |              |            | Photo trigger switch                                          |
| engage_main_motor_switch | `uint8`  |              |            | Engage the main motor (for helicopters)                       |
| payload_power_switch     | `uint8`  |              |            | Payload power switch                                          |
| switch_changes           | `uint32` |              |            | number of switch changes                                      |

## Constants

| Name                                              | Type    | Value | Description                       |
| ------------------------------------------------- | ------- | ----- | --------------------------------- |
| <a id="#SWITCH_POS_NONE"></a> SWITCH_POS_NONE     | `uint8` | 0     | switch is not mapped              |
| <a id="#SWITCH_POS_ON"></a> SWITCH_POS_ON         | `uint8` | 1     | switch activated (value = 1)      |
| <a id="#SWITCH_POS_MIDDLE"></a> SWITCH_POS_MIDDLE | `uint8` | 2     | middle position (value = 0)       |
| <a id="#SWITCH_POS_OFF"></a> SWITCH_POS_OFF       | `uint8` | 3     | switch not activated (value = -1) |
| <a id="#MODE_SLOT_NONE"></a> MODE_SLOT_NONE       | `uint8` | 0     | no mode slot assigned             |
| <a id="#MODE_SLOT_1"></a> MODE_SLOT_1             | `uint8` | 1     | mode slot 1 selected              |
| <a id="#MODE_SLOT_2"></a> MODE_SLOT_2             | `uint8` | 2     | mode slot 2 selected              |
| <a id="#MODE_SLOT_3"></a> MODE_SLOT_3             | `uint8` | 3     | mode slot 3 selected              |
| <a id="#MODE_SLOT_4"></a> MODE_SLOT_4             | `uint8` | 4     | mode slot 4 selected              |
| <a id="#MODE_SLOT_5"></a> MODE_SLOT_5             | `uint8` | 5     | mode slot 5 selected              |
| <a id="#MODE_SLOT_6"></a> MODE_SLOT_6             | `uint8` | 6     | mode slot 6 selected              |
| <a id="#MODE_SLOT_NUM"></a> MODE_SLOT_NUM         | `uint8` | 6     | number of slots                   |

## Source Message

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

::: details Click here to see original file

```c
uint64 timestamp                 # time since system start (microseconds)

uint64 timestamp_sample          # the timestamp of the raw data (microseconds)

uint8 SWITCH_POS_NONE   = 0      # switch is not mapped
uint8 SWITCH_POS_ON     = 1      # switch activated (value = 1)
uint8 SWITCH_POS_MIDDLE = 2      # middle position (value = 0)
uint8 SWITCH_POS_OFF    = 3      # switch not activated (value = -1)

uint8 MODE_SLOT_NONE    = 0      # no mode slot assigned
uint8 MODE_SLOT_1       = 1      # mode slot 1 selected
uint8 MODE_SLOT_2       = 2      # mode slot 2 selected
uint8 MODE_SLOT_3       = 3      # mode slot 3 selected
uint8 MODE_SLOT_4       = 4      # mode slot 4 selected
uint8 MODE_SLOT_5       = 5      # mode slot 5 selected
uint8 MODE_SLOT_6       = 6      # mode slot 6 selected
uint8 MODE_SLOT_NUM     = 6      # number of slots

uint8 mode_slot                  # the slot a specific model selector is in

uint8 arm_switch                 # arm/disarm switch: _DISARMED_, ARMED
uint8 return_switch              # return to launch 2 position switch (mandatory): _NORMAL_, RTL
uint8 loiter_switch              # loiter 2 position switch (optional): _MISSION_, LOITER
uint8 offboard_switch            # offboard 2 position switch (optional): _NORMAL_, OFFBOARD
uint8 kill_switch                # throttle kill: _NORMAL_, KILL
uint8 termination_switch         # trigger termination which cannot be undone
uint8 gear_switch                # landing gear switch: _DOWN_, UP
uint8 transition_switch          # VTOL transition switch: _HOVER, FORWARD_FLIGHT

uint8 photo_switch               # Photo trigger switch
uint8 video_switch               # Photo trigger switch

uint8 engage_main_motor_switch   # Engage the main motor (for helicopters)

uint8 payload_power_switch       # Payload power switch

uint32 switch_changes            # number of switch changes
```

:::