Subset of Common Set

These messages are reproduced from the original documentation at mavlink.io – MAVLink Common Message Set. This is only a subset of the full list, including only messages used in the MARSH project, to make the protocol less overwhelming.

Before designing a new message, first check the original documentation linked above. If you find a useful message in the common set, consider editing the list of identifiers used for generating this page.

Conventions

Field z in the MANUAL_CONTROL message should contain 0 for lowest achievable blade tilt and 1 for highest. As a result, the trim position for collective is probably not 0, and is determined by the flight model. This also means that the input inceptor for collective is between 0 and 1 unlike cyclic and pedals. Do not send negative z values, unless flying acrobatic rotorcraft upside-down or fixed wing with reverse thrust.

Message MANUAL_SETPOINT is used for desired control positions (as displayed in Lidia), so the values for all fields should be treated as normalized controls positions between -1 and 1 instead of rad/s. It is not supported by ArduPilot at all, and only used for Rover in PX4, so no collisions are expected. Different meaning (target, trim) can be assigned to the values in the mode_switch field as defined in MARSH_MANUAL_SETPOINT_MODE

Message RAW_RPM for helicopters should send rotor with index 0, and then engines in order.

The message SIM_STATE and other messages with accelerations, report them as would be measured by an on-board accelerometer. The values correspond to accelerations in the body reference frame axes: X forward, Y right, Z down. The gravity should also be included, so for a stationary and horizontal vehicle the acceleration vector in meters per second squared is [0, 0, -9.80665], with X component becoming positive as it accelerates forward (tested with ArduPilot SITL).

Specifically message SIM_STATE should be sent with attitude encoded both as quaternion and Euler angles if possible. If a sender is outputting only Euler angles, the quaternion should be sent as [0, 0, 0, 0] (instead of [1, 0, 0, 0] for identity rotation). The receivers can detect if the quaternion contains valid data by comparing the vector magnitude (all components squared) to 1 with some tolerance for numeric error.

Definition list

Generated on 2025-05-28T08:57:59 from commit dd6420b

• Enums
  • MAV_FRAME
  • MAV_PARAM_TYPE
  • MAV_RESULT
  • MAV_SEVERITY
  • POSITION_TARGET_TYPEMASK
• Mav Commands
  • MAV_CMD_SET_MESSAGE_INTERVAL
  • MAV_CMD_REQUEST_MESSAGE
• Messages
  • PARAM_REQUEST_READ
  • PARAM_REQUEST_LIST
  • PARAM_VALUE
  • PARAM_SET
  • ATTITUDE
  • LOCAL_POSITION_NED
  • MANUAL_CONTROL
  • COMMAND_LONG
  • COMMAND_ACK
  • MANUAL_SETPOINT
  • SET_POSITION_TARGET_LOCAL_NED
  • POSITION_TARGET_LOCAL_NED
  • SIM_STATE
  • STATUSTEXT
  • RAW_RPM
  • COMPONENT_INFORMATION_BASIC

MAVLink Include Files: standard.xml

MAVLink Protocol Version

The current MAVLink version is 2.3. The minor version numbers (after the dot) range from 1-255.

This file has protocol dialect: 0.

MAVLink Type Enumerations

MAV_FRAME

[Enum] Coordinate frames used by MAVLink. Not all frames are supported by all commands, messages, or vehicles. Global frames use the following naming conventions: - "GLOBAL": Global coordinate frame with WGS84 latitude/longitude and altitude positive over mean sea level (MSL) by default. The following modifiers may be used with "GLOBAL": - "RELATIVE_ALT": Altitude is relative to the vehicle home position rather than MSL. - "TERRAIN_ALT": Altitude is relative to ground level rather than MSL. - "INT": Latitude/longitude (in degrees) are scaled by multiplying by 1E7. Local frames use the following naming conventions: - "LOCAL": Origin of local frame is fixed relative to earth. Unless otherwise specified this origin is the origin of the vehicle position-estimator ("EKF"). - "BODY": Origin of local frame travels with the vehicle. NOTE, "BODY" does NOT indicate alignment of frame axis with vehicle attitude. - "OFFSET": Deprecated synonym for "BODY" (origin travels with the vehicle). Not to be used for new frames. Some deprecated frames do not follow these conventions (e.g. MAV_FRAME_BODY_NED and MAV_FRAME_BODY_OFFSET_NED).

Value	Field Name	Description
0	MAV_FRAME_GLOBAL	Global (WGS84) coordinate frame + altitude relative to mean sea level (MSL).
1	MAV_FRAME_LOCAL_NED	NED local tangent frame (x: North, y: East, z: Down) with origin fixed relative to earth.
2	MAV_FRAME_MISSION	NOT a coordinate frame, indicates a mission command.
3	MAV_FRAME_GLOBAL_RELATIVE_ALT	Global (WGS84) coordinate frame + altitude relative to the home position.
4	MAV_FRAME_LOCAL_ENU	ENU local tangent frame (x: East, y: North, z: Up) with origin fixed relative to earth.
5	MAV_FRAME_GLOBAL_INT DEPRECATED: Replaced by MAV_FRAME_GLOBAL (2024-03). Use MAV_FRAME_GLOBAL in COMMAND_INT (and elsewhere) as a synonymous replacement.	Global (WGS84) coordinate frame (scaled) + altitude relative to mean sea level (MSL).
6	MAV_FRAME_GLOBAL_RELATIVE_ALT_INT DEPRECATED: Replaced by MAV_FRAME_GLOBAL_RELATIVE_ALT (2024-03). Use MAV_FRAME_GLOBAL_RELATIVE_ALT in COMMAND_INT (and elsewhere) as a synonymous replacement.	Global (WGS84) coordinate frame (scaled) + altitude relative to the home position.
7	MAV_FRAME_LOCAL_OFFSET_NED	NED local tangent frame (x: North, y: East, z: Down) with origin that travels with the vehicle.
8	MAV_FRAME_BODY_NED DEPRECATED: Replaced by MAV_FRAME_BODY_FRD (2019-08).	Same as MAV_FRAME_LOCAL_NED when used to represent position values. Same as MAV_FRAME_BODY_FRD when used with velocity/acceleration values.
9	MAV_FRAME_BODY_OFFSET_NED DEPRECATED: Replaced by MAV_FRAME_BODY_FRD (2019-08).	This is the same as MAV_FRAME_BODY_FRD.
10	MAV_FRAME_GLOBAL_TERRAIN_ALT	Global (WGS84) coordinate frame with AGL altitude (altitude at ground level).
11	MAV_FRAME_GLOBAL_TERRAIN_ALT_INT DEPRECATED: Replaced by MAV_FRAME_GLOBAL_TERRAIN_ALT (2024-03). Use MAV_FRAME_GLOBAL_TERRAIN_ALT in COMMAND_INT (and elsewhere) as a synonymous replacement.	Global (WGS84) coordinate frame (scaled) with AGL altitude (altitude at ground level).
12	MAV_FRAME_BODY_FRD	FRD local frame aligned to the vehicle's attitude (x: Forward, y: Right, z: Down) with an origin that travels with vehicle.
13	MAV_FRAME_RESERVED_13 DEPRECATED: Replaced by (2019-04).	MAV_FRAME_BODY_FLU - Body fixed frame of reference, Z-up (x: Forward, y: Left, z: Up).
14	MAV_FRAME_RESERVED_14 DEPRECATED: Replaced by MAV_FRAME_LOCAL_FRD (2019-04).	MAV_FRAME_MOCAP_NED - Odometry local coordinate frame of data given by a motion capture system, Z-down (x: North, y: East, z: Down).
15	MAV_FRAME_RESERVED_15 DEPRECATED: Replaced by MAV_FRAME_LOCAL_FLU (2019-04).	MAV_FRAME_MOCAP_ENU - Odometry local coordinate frame of data given by a motion capture system, Z-up (x: East, y: North, z: Up).
16	MAV_FRAME_RESERVED_16 DEPRECATED: Replaced by MAV_FRAME_LOCAL_FRD (2019-04).	MAV_FRAME_VISION_NED - Odometry local coordinate frame of data given by a vision estimation system, Z-down (x: North, y: East, z: Down).
17	MAV_FRAME_RESERVED_17 DEPRECATED: Replaced by MAV_FRAME_LOCAL_FLU (2019-04).	MAV_FRAME_VISION_ENU - Odometry local coordinate frame of data given by a vision estimation system, Z-up (x: East, y: North, z: Up).
18	MAV_FRAME_RESERVED_18 DEPRECATED: Replaced by MAV_FRAME_LOCAL_FRD (2019-04).	MAV_FRAME_ESTIM_NED - Odometry local coordinate frame of data given by an estimator running onboard the vehicle, Z-down (x: North, y: East, z: Down).
19	MAV_FRAME_RESERVED_19 DEPRECATED: Replaced by MAV_FRAME_LOCAL_FLU (2019-04).	MAV_FRAME_ESTIM_ENU - Odometry local coordinate frame of data given by an estimator running onboard the vehicle, Z-up (x: East, y: North, z: Up).
20	MAV_FRAME_LOCAL_FRD	FRD local tangent frame (x: Forward, y: Right, z: Down) with origin fixed relative to earth. The forward axis is aligned to the front of the vehicle in the horizontal plane.
21	MAV_FRAME_LOCAL_FLU	FLU local tangent frame (x: Forward, y: Left, z: Up) with origin fixed relative to earth. The forward axis is aligned to the front of the vehicle in the horizontal plane.

MAV_PARAM_TYPE

[Enum] Specifies the datatype of a MAVLink parameter.

Value	Field Name	Description
1	MAV_PARAM_TYPE_UINT8	8-bit unsigned integer
2	MAV_PARAM_TYPE_INT8	8-bit signed integer
3	MAV_PARAM_TYPE_UINT16	16-bit unsigned integer
4	MAV_PARAM_TYPE_INT16	16-bit signed integer
5	MAV_PARAM_TYPE_UINT32	32-bit unsigned integer
6	MAV_PARAM_TYPE_INT32	32-bit signed integer
7	MAV_PARAM_TYPE_UINT64	64-bit unsigned integer
8	MAV_PARAM_TYPE_INT64	64-bit signed integer
9	MAV_PARAM_TYPE_REAL32	32-bit floating-point
10	MAV_PARAM_TYPE_REAL64	64-bit floating-point

MAV_RESULT

[Enum] Result from a MAVLink command (MAV_CMD)

Value	Field Name	Description
0	MAV_RESULT_ACCEPTED	Command is valid (is supported and has valid parameters), and was executed.
1	MAV_RESULT_TEMPORARILY_REJECTED	Command is valid, but cannot be executed at this time. This is used to indicate a problem that should be fixed just by waiting (e.g. a state machine is busy, can't arm because have not got GPS lock, etc.). Retrying later should work.
2	MAV_RESULT_DENIED	Command is invalid (is supported but has invalid parameters). Retrying same command and parameters will not work.
3	MAV_RESULT_UNSUPPORTED	Command is not supported (unknown).
4	MAV_RESULT_FAILED	Command is valid, but execution has failed. This is used to indicate any non-temporary or unexpected problem, i.e. any problem that must be fixed before the command can succeed/be retried. For example, attempting to write a file when out of memory, attempting to arm when sensors are not calibrated, etc.
5	MAV_RESULT_IN_PROGRESS	Command is valid and is being executed. This will be followed by further progress updates, i.e. the component may send further COMMAND_ACK messages with result MAV_RESULT_IN_PROGRESS (at a rate decided by the implementation), and must terminate by sending a COMMAND_ACK message with final result of the operation. The COMMAND_ACK.progress field can be used to indicate the progress of the operation.
6	MAV_RESULT_CANCELLED	Command has been cancelled (as a result of receiving a COMMAND_CANCEL message).
7	MAV_RESULT_COMMAND_LONG_ONLY	Command is only accepted when sent as a COMMAND_LONG.
8	MAV_RESULT_COMMAND_INT_ONLY	Command is only accepted when sent as a COMMAND_INT.
9	MAV_RESULT_COMMAND_UNSUPPORTED_MAV_FRAME	Command is invalid because a frame is required and the specified frame is not supported.

MAV_SEVERITY

[Enum] Indicates the severity level, generally used for status messages to indicate their relative urgency. Based on RFC-5424 using expanded definitions at: http://www.kiwisyslog.com/kb/info:-syslog-message-levels/.

Value	Field Name	Description
0	MAV_SEVERITY_EMERGENCY	System is unusable. This is a "panic" condition.
1	MAV_SEVERITY_ALERT	Action should be taken immediately. Indicates error in non-critical systems.
2	MAV_SEVERITY_CRITICAL	Action must be taken immediately. Indicates failure in a primary system.
3	MAV_SEVERITY_ERROR	Indicates an error in secondary/redundant systems.
4	MAV_SEVERITY_WARNING	Indicates about a possible future error if this is not resolved within a given timeframe. Example would be a low battery warning.
5	MAV_SEVERITY_NOTICE	An unusual event has occurred, though not an error condition. This should be investigated for the root cause.
6	MAV_SEVERITY_INFO	Normal operational messages. Useful for logging. No action is required for these messages.
7	MAV_SEVERITY_DEBUG	Useful non-operational messages that can assist in debugging. These should not occur during normal operation.

POSITION_TARGET_TYPEMASK

[Enum] Bitmap to indicate which dimensions should be ignored by the vehicle: a value of 0b0000000000000000 or 0b0000001000000000 indicates that none of the setpoint dimensions should be ignored. If bit 9 is set the floats afx afy afz should be interpreted as force instead of acceleration.

Value	Field Name	Description
1	POSITION_TARGET_TYPEMASK_X_IGNORE	Ignore position x
2	POSITION_TARGET_TYPEMASK_Y_IGNORE	Ignore position y
4	POSITION_TARGET_TYPEMASK_Z_IGNORE	Ignore position z
8	POSITION_TARGET_TYPEMASK_VX_IGNORE	Ignore velocity x
16	POSITION_TARGET_TYPEMASK_VY_IGNORE	Ignore velocity y
32	POSITION_TARGET_TYPEMASK_VZ_IGNORE	Ignore velocity z
64	POSITION_TARGET_TYPEMASK_AX_IGNORE	Ignore acceleration x
128	POSITION_TARGET_TYPEMASK_AY_IGNORE	Ignore acceleration y
256	POSITION_TARGET_TYPEMASK_AZ_IGNORE	Ignore acceleration z
512	POSITION_TARGET_TYPEMASK_FORCE_SET	Use force instead of acceleration
1024	POSITION_TARGET_TYPEMASK_YAW_IGNORE	Ignore yaw
2048	POSITION_TARGET_TYPEMASK_YAW_RATE_IGNORE	Ignore yaw rate

MAVLink Commands (MAV_CMD)

MAVLink commands (MAV_CMD) and messages are different! These commands define the values of up to 7 parameters that are packaged INSIDE specific messages used in the Mission Protocol and Command Protocol. Use commands for actions in missions or if you need acknowledgment and/or retry logic from a request. Otherwise use messages.

Commands to be executed by the MAV. They can be executed on user request, or as part of a mission script. If the action is used in a mission, the parameter mapping to the waypoint/mission message is as follows: Param 1, Param 2, Param 3, Param 4, X: Param 5, Y:Param 6, Z:Param 7. This command list is similar what ARINC 424 is for commercial aircraft: A data format how to interpret waypoint/mission data. NaN and INT32_MAX may be used in float/integer params (respectively) to indicate optional/default values (e.g. to use the component's current yaw or latitude rather than a specific value). See https://mavlink.io/en/guide/xml_schema.html#MAV_CMD for information about the structure of the MAV_CMD entries

MAV_CMD_SET_MESSAGE_INTERVAL (511 )

[Command] Set the interval between messages for a particular MAVLink message ID. This interface replaces REQUEST_DATA_STREAM.

Param (:Label)	Description	Values	Units
1: Message ID	The MAVLink message ID	min:0 max:16777215 increment:1
2: Interval	The interval between two messages. -1: disable. 0: request default rate (which may be zero).	min: -1 increment:1	us
3: Req Param 3	Use for index ID, if required. Otherwise, the use of this parameter (if any) must be defined in the requested message. By default assumed not used (0). When used as an index ID, 0 means "all instances", "1" means the first instance in the sequence (the emitted message will have an id of 0 if message ids are 0-indexed, or 1 if index numbers start from one).
4: Req Param 4	The use of this parameter (if any), must be defined in the requested message. By default assumed not used (0).
5: Req Param 5	The use of this parameter (if any), must be defined in the requested message. By default assumed not used (0/NaN).
6: Req Param 6	The use of this parameter (if any), must be defined in the requested message. By default assumed not used (0/NaN).
7: Response Target	Target address of message stream (if message has target address fields). 0: Flight-stack default (recommended), 1: address of requestor, 2: broadcast.	min:0 max:2 increment:1

MAV_CMD_REQUEST_MESSAGE (512 )

[Command] Request the target system(s) emit a single instance of a specified message (i.e. a "one-shot" version of MAV_CMD_SET_MESSAGE_INTERVAL).

Param (:Label)	Description	Values
1: Message ID	The MAVLink message ID of the requested message.	min:0 max:16777215 increment:1
2: Req Param 1	Use for index ID, if required. Otherwise, the use of this parameter (if any) must be defined in the requested message. By default assumed not used (0).
3: Req Param 2	The use of this parameter (if any), must be defined in the requested message. By default assumed not used (0).
4: Req Param 3	The use of this parameter (if any), must be defined in the requested message. By default assumed not used (0).
5: Req Param 4	The use of this parameter (if any), must be defined in the requested message. By default assumed not used (0).
6: Req Param 5	The use of this parameter (if any), must be defined in the requested message. By default assumed not used (0).
7: Response Target	Target address for requested message (if message has target address fields). 0: Flight-stack default, 1: address of requestor, 2: broadcast.	min:0 max:2 increment:1

MAVLink Messages

PARAM_REQUEST_READ ( #20 )

[Message] Request to read the onboard parameter with the param_id string id. Onboard parameters are stored as key[const char*] -> value[float]. This allows to send a parameter to any other component (such as the GCS) without the need of previous knowledge of possible parameter names. Thus the same GCS can store different parameters for different autopilots. See also https://mavlink.io/en/services/parameter.html for a full documentation of QGroundControl and IMU code.

Field Name	Type	Description
target_system	uint8_t	System ID
target_component	uint8_t	Component ID
param_id	char[16]	Onboard parameter id, terminated by NULL if the length is less than 16 human-readable chars and WITHOUT null termination (NULL) byte if the length is exactly 16 chars - applications have to provide 16+1 bytes storage if the ID is stored as string
param_index	int16_t	Parameter index. Send -1 to use the param ID field as identifier (else the param id will be ignored)

PARAM_REQUEST_LIST ( #21 )

[Message] Request all parameters of this component. After this request, all parameters are emitted. The parameter microservice is documented at https://mavlink.io/en/services/parameter.html

Field Name	Type	Description
target_system	uint8_t	System ID
target_component	uint8_t	Component ID

PARAM_VALUE ( #22 )

[Message] Emit the value of a onboard parameter. The inclusion of param_count and param_index in the message allows the recipient to keep track of received parameters and allows him to re-request missing parameters after a loss or timeout. The parameter microservice is documented at https://mavlink.io/en/services/parameter.html

Field Name	Type	Values	Description
param_id	char[16]		Onboard parameter id, terminated by NULL if the length is less than 16 human-readable chars and WITHOUT null termination (NULL) byte if the length is exactly 16 chars - applications have to provide 16+1 bytes storage if the ID is stored as string
param_value	float		Onboard parameter value
param_type	uint8_t	MAV_PARAM_TYPE	Onboard parameter type.
param_count	uint16_t		Total number of onboard parameters
param_index	uint16_t		Index of this onboard parameter

PARAM_SET ( #23 )

[Message] Set a parameter value (write new value to permanent storage). The receiving component should acknowledge the new parameter value by broadcasting a PARAM_VALUE message (broadcasting ensures that multiple GCS all have an up-to-date list of all parameters). If the sending GCS did not receive a PARAM_VALUE within its timeout time, it should re-send the PARAM_SET message. The parameter microservice is documented at https://mavlink.io/en/services/parameter.html.

Field Name	Type	Values	Description
target_system	uint8_t		System ID
target_component	uint8_t		Component ID
param_id	char[16]		Onboard parameter id, terminated by NULL if the length is less than 16 human-readable chars and WITHOUT null termination (NULL) byte if the length is exactly 16 chars - applications have to provide 16+1 bytes storage if the ID is stored as string
param_value	float		Onboard parameter value
param_type	uint8_t	MAV_PARAM_TYPE	Onboard parameter type.

ATTITUDE ( #30 )

[Message] The attitude in the aeronautical frame (right-handed, Z-down, Y-right, X-front, ZYX, intrinsic).

Field Name	Type	Units	Description
time_boot_ms	uint32_t	ms	Timestamp (time since system boot).
roll	float	rad	Roll angle (-pi..+pi)
pitch	float	rad	Pitch angle (-pi..+pi)
yaw	float	rad	Yaw angle (-pi..+pi)
rollspeed	float	rad/s	Roll angular speed
pitchspeed	float	rad/s	Pitch angular speed
yawspeed	float	rad/s	Yaw angular speed

LOCAL_POSITION_NED ( #32 )

[Message] The filtered local position (e.g. fused computer vision and accelerometers). Coordinate frame is right-handed, Z-axis down (aeronautical frame, NED / north-east-down convention)

Field Name	Type	Units	Description
time_boot_ms	uint32_t	ms	Timestamp (time since system boot).
x	float	m	X Position
y	float	m	Y Position
z	float	m	Z Position
vx	float	m/s	X Speed
vy	float	m/s	Y Speed
vz	float	m/s	Z Speed

MANUAL_CONTROL ( #69 )

[Message] This message provides an API for manually controlling the vehicle using standard joystick axes nomenclature, along with a joystick-like input device. Unused axes can be disabled and buttons states are transmitted as individual on/off bits of a bitmask

Field Name	Type	Description
target	uint8_t	The system to be controlled.
x	int16_t	X-axis, normalized to the range [-1000,1000]. A value of INT16_MAX indicates that this axis is invalid. Generally corresponds to forward(1000)-backward(-1000) movement on a joystick and the pitch of a vehicle.
y	int16_t	Y-axis, normalized to the range [-1000,1000]. A value of INT16_MAX indicates that this axis is invalid. Generally corresponds to left(-1000)-right(1000) movement on a joystick and the roll of a vehicle.
z	int16_t	Z-axis, normalized to the range [-1000,1000]. A value of INT16_MAX indicates that this axis is invalid. Generally corresponds to a separate slider movement with maximum being 1000 and minimum being -1000 on a joystick and the thrust of a vehicle. Positive values are positive thrust, negative values are negative thrust.
r	int16_t	R-axis, normalized to the range [-1000,1000]. A value of INT16_MAX indicates that this axis is invalid. Generally corresponds to a twisting of the joystick, with counter-clockwise being 1000 and clockwise being -1000, and the yaw of a vehicle.
buttons	uint16_t	A bitfield corresponding to the joystick buttons' 0-15 current state, 1 for pressed, 0 for released. The lowest bit corresponds to Button 1.
buttons2 **	uint16_t	A bitfield corresponding to the joystick buttons' 16-31 current state, 1 for pressed, 0 for released. The lowest bit corresponds to Button 16.
enabled_extensions **	uint8_t	Set bits to 1 to indicate which of the following extension fields contain valid data: bit 0: pitch, bit 1: roll, bit 2: aux1, bit 3: aux2, bit 4: aux3, bit 5: aux4, bit 6: aux5, bit 7: aux6
s **	int16_t	Pitch-only-axis, normalized to the range [-1000,1000]. Generally corresponds to pitch on vehicles with additional degrees of freedom. Valid if bit 0 of enabled_extensions field is set. Set to 0 if invalid.
t **	int16_t	Roll-only-axis, normalized to the range [-1000,1000]. Generally corresponds to roll on vehicles with additional degrees of freedom. Valid if bit 1 of enabled_extensions field is set. Set to 0 if invalid.
aux1 **	int16_t	Aux continuous input field 1. Normalized in the range [-1000,1000]. Purpose defined by recipient. Valid data if bit 2 of enabled_extensions field is set. 0 if bit 2 is unset.
aux2 **	int16_t	Aux continuous input field 2. Normalized in the range [-1000,1000]. Purpose defined by recipient. Valid data if bit 3 of enabled_extensions field is set. 0 if bit 3 is unset.
aux3 **	int16_t	Aux continuous input field 3. Normalized in the range [-1000,1000]. Purpose defined by recipient. Valid data if bit 4 of enabled_extensions field is set. 0 if bit 4 is unset.
aux4 **	int16_t	Aux continuous input field 4. Normalized in the range [-1000,1000]. Purpose defined by recipient. Valid data if bit 5 of enabled_extensions field is set. 0 if bit 5 is unset.
aux5 **	int16_t	Aux continuous input field 5. Normalized in the range [-1000,1000]. Purpose defined by recipient. Valid data if bit 6 of enabled_extensions field is set. 0 if bit 6 is unset.
aux6 **	int16_t	Aux continuous input field 6. Normalized in the range [-1000,1000]. Purpose defined by recipient. Valid data if bit 7 of enabled_extensions field is set. 0 if bit 7 is unset.

COMMAND_LONG ( #76 )

[Message] Send a command with up to seven parameters to the MAV. COMMAND_INT is generally preferred when sending MAV_CMD commands that include positional information; it offers higher precision and allows the MAV_FRAME to be specified (which may otherwise be ambiguous, particularly for altitude). The command microservice is documented at https://mavlink.io/en/services/command.html

Field Name	Type	Values	Description
target_system	uint8_t		System which should execute the command
target_component	uint8_t		Component which should execute the command, 0 for all components
command	uint16_t	MAV_CMD	Command ID (of command to send).
confirmation	uint8_t		0: First transmission of this command. 1-255: Confirmation transmissions (e.g. for kill command)
param1	float		Parameter 1 (for the specific command).
param2	float		Parameter 2 (for the specific command).
param3	float		Parameter 3 (for the specific command).
param4	float		Parameter 4 (for the specific command).
param5	float		Parameter 5 (for the specific command).
param6	float		Parameter 6 (for the specific command).
param7	float		Parameter 7 (for the specific command).

COMMAND_ACK ( #77 )

[Message] Report status of a command. Includes feedback whether the command was executed. The command microservice is documented at https://mavlink.io/en/services/command.html

Field Name	Type	Units	Values	Description
command	uint16_t		MAV_CMD	Command ID (of acknowledged command).
result	uint8_t		MAV_RESULT	Result of command.
progress **	uint8_t	%		The progress percentage when result is MAV_RESULT_IN_PROGRESS. Values: [0-100], or UINT8_MAX if the progress is unknown.
result_param2 **	int32_t			Additional result information. Can be set with a command-specific enum containing command-specific error reasons for why the command might be denied. If used, the associated enum must be documented in the corresponding MAV_CMD (this enum should have a 0 value to indicate "unused" or "unknown").
target_system **	uint8_t			System ID of the target recipient. This is the ID of the system that sent the command for which this COMMAND_ACK is an acknowledgement.
target_component **	uint8_t			Component ID of the target recipient. This is the ID of the system that sent the command for which this COMMAND_ACK is an acknowledgement.

MANUAL_SETPOINT ( #81 )

[Message] Setpoint in roll, pitch, yaw and thrust from the operator

Field Name	Type	Units	Description
time_boot_ms	uint32_t	ms	Timestamp (time since system boot).
roll	float	rad/s	Desired roll rate
pitch	float	rad/s	Desired pitch rate
yaw	float	rad/s	Desired yaw rate
thrust	float		Collective thrust, normalized to 0 .. 1
mode_switch	uint8_t		Flight mode switch position, 0.. 255
manual_override_switch	uint8_t		Override mode switch position, 0.. 255

SET_POSITION_TARGET_LOCAL_NED ( #84 )

[Message] Sets a desired vehicle position in a local north-east-down coordinate frame. Used by an external controller to command the vehicle (manual controller or other system).

Field Name	Type	Units	Values	Description
time_boot_ms	uint32_t	ms		Timestamp (time since system boot).
target_system	uint8_t			System ID
target_component	uint8_t			Component ID
coordinate_frame	uint8_t		MAV_FRAME	Valid options are: MAV_FRAME_LOCAL_NED = 1, MAV_FRAME_LOCAL_OFFSET_NED = 7, MAV_FRAME_BODY_NED = 8, MAV_FRAME_BODY_OFFSET_NED = 9
type_mask	uint16_t		POSITION_TARGET_TYPEMASK	Bitmap to indicate which dimensions should be ignored by the vehicle.
x	float	m		X Position in NED frame
y	float	m		Y Position in NED frame
z	float	m		Z Position in NED frame (note, altitude is negative in NED)
vx	float	m/s		X velocity in NED frame
vy	float	m/s		Y velocity in NED frame
vz	float	m/s		Z velocity in NED frame
afx	float	m/s/s		X acceleration or force (if bit 10 of type_mask is set) in NED frame in meter / s^2 or N
afy	float	m/s/s		Y acceleration or force (if bit 10 of type_mask is set) in NED frame in meter / s^2 or N
afz	float	m/s/s		Z acceleration or force (if bit 10 of type_mask is set) in NED frame in meter / s^2 or N
yaw	float	rad		yaw setpoint
yaw_rate	float	rad/s		yaw rate setpoint

POSITION_TARGET_LOCAL_NED ( #85 )

[Message] Reports the current commanded vehicle position, velocity, and acceleration as specified by the autopilot. This should match the commands sent in SET_POSITION_TARGET_LOCAL_NED if the vehicle is being controlled this way.

Field Name	Type	Units	Values	Description
time_boot_ms	uint32_t	ms		Timestamp (time since system boot).
coordinate_frame	uint8_t		MAV_FRAME	Valid options are: MAV_FRAME_LOCAL_NED = 1, MAV_FRAME_LOCAL_OFFSET_NED = 7, MAV_FRAME_BODY_NED = 8, MAV_FRAME_BODY_OFFSET_NED = 9
type_mask	uint16_t		POSITION_TARGET_TYPEMASK	Bitmap to indicate which dimensions should be ignored by the vehicle.
x	float	m		X Position in NED frame
y	float	m		Y Position in NED frame
z	float	m		Z Position in NED frame (note, altitude is negative in NED)
vx	float	m/s		X velocity in NED frame
vy	float	m/s		Y velocity in NED frame
vz	float	m/s		Z velocity in NED frame
afx	float	m/s/s		X acceleration or force (if bit 10 of type_mask is set) in NED frame in meter / s^2 or N
afy	float	m/s/s		Y acceleration or force (if bit 10 of type_mask is set) in NED frame in meter / s^2 or N
afz	float	m/s/s		Z acceleration or force (if bit 10 of type_mask is set) in NED frame in meter / s^2 or N
yaw	float	rad		yaw setpoint
yaw_rate	float	rad/s		yaw rate setpoint

SIM_STATE ( #108 )

[Message] Status of simulation environment, if used

Field Name	Type	Units	Description
q1	float		True attitude quaternion component 1, w (1 in null-rotation)
q2	float		True attitude quaternion component 2, x (0 in null-rotation)
q3	float		True attitude quaternion component 3, y (0 in null-rotation)
q4	float		True attitude quaternion component 4, z (0 in null-rotation)
roll	float	rad	Attitude roll expressed as Euler angles, not recommended except for human-readable outputs
pitch	float	rad	Attitude pitch expressed as Euler angles, not recommended except for human-readable outputs
yaw	float	rad	Attitude yaw expressed as Euler angles, not recommended except for human-readable outputs
xacc	float	m/s/s	X acceleration
yacc	float	m/s/s	Y acceleration
zacc	float	m/s/s	Z acceleration
xgyro	float	rad/s	Angular speed around X axis
ygyro	float	rad/s	Angular speed around Y axis
zgyro	float	rad/s	Angular speed around Z axis
lat	float	deg	Latitude (lower precision). Both this and the lat_int field should be set.
lon	float	deg	Longitude (lower precision). Both this and the lon_int field should be set.
alt	float	m	Altitude
std_dev_horz	float		Horizontal position standard deviation
std_dev_vert	float		Vertical position standard deviation
vn	float	m/s	True velocity in north direction in earth-fixed NED frame
ve	float	m/s	True velocity in east direction in earth-fixed NED frame
vd	float	m/s	True velocity in down direction in earth-fixed NED frame
lat_int **	int32_t	degE7	Latitude (higher precision). If 0, recipients should use the lat field value (otherwise this field is preferred).
lon_int **	int32_t	degE7	Longitude (higher precision). If 0, recipients should use the lon field value (otherwise this field is preferred).

STATUSTEXT ( #253 )

[Message] Status text message. These messages are printed in yellow in the COMM console of QGroundControl. WARNING: They consume quite some bandwidth, so use only for important status and error messages. If implemented wisely, these messages are buffered on the MCU and sent only at a limited rate (e.g. 10 Hz).

Field Name	Type	Values	Description
severity	uint8_t	MAV_SEVERITY	Severity of status. Relies on the definitions within RFC-5424.
text	char[50]		Status text message, without null termination character
id **	uint16_t		Unique (opaque) identifier for this statustext message. May be used to reassemble a logical long-statustext message from a sequence of chunks. A value of zero indicates this is the only chunk in the sequence and the message can be emitted immediately.
chunk_seq **	uint8_t		This chunk's sequence number; indexing is from zero. Any null character in the text field is taken to mean this was the last chunk.

RAW_RPM ( #339 )

[Message] (MAVLink 2) RPM sensor data message.

Field Name	Type	Units	Description
index	uint8_t		Index of this RPM sensor (0-indexed)
frequency	float	rpm	Indicated rate

COMPONENT_INFORMATION_BASIC ( #396 )

[Message] (MAVLink 2) Basic component information data. Should be requested using MAV_CMD_REQUEST_MESSAGE on startup, or when required.

Field Name	Type	Units	Values	Description
time_boot_ms	uint32_t	ms		Timestamp (time since system boot).
capabilities	uint64_t		MAV_PROTOCOL_CAPABILITY	Component capability flags
time_manufacture_s	uint32_t	s		Date of manufacture as a UNIX Epoch time (since 1.1.1970) in seconds.
vendor_name	char[32]			Name of the component vendor. Needs to be zero terminated. The field is optional and can be empty/all zeros.
model_name	char[32]			Name of the component model. Needs to be zero terminated. The field is optional and can be empty/all zeros.
software_version	char[24]			Software version. The recommended format is SEMVER: 'major.minor.patch' (any format may be used). The field must be zero terminated if it has a value. The field is optional and can be empty/all zeros.
hardware_version	char[24]			Hardware version. The recommended format is SEMVER: 'major.minor.patch' (any format may be used). The field must be zero terminated if it has a value. The field is optional and can be empty/all zeros.
serial_number	char[32]			Hardware serial number. The field must be zero terminated if it has a value. The field is optional and can be empty/all zeros.