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# DeviceInformation (UORB message)

Device information.

Can be used to uniquely associate a device_id from a sensor topic with a physical device using serial number.
as well as tracking of the used firmware versions on the devices.

**TOPICS:** device_information

## Fields

| Name             | Type       | Unit [Frame] | Range/Enum                                                                                           | Description                                                                  |
| ---------------- | ---------- | ------------ | ---------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------- |
| timestamp        | `uint64`   |              |                                                                                                      | time since system start (microseconds)                                       |
| device_type      | `uint8`    |              | [DEVICE_TYPE](#DEVICE_TYPE)                                                                          | Type of the device. Matches MAVLink DEVICE_TYPE enum                         |
| name             | `char[80]` |              |                                                                                                      | Name of device e.g. DroneCAN node name                                       |
| `uint32`         |            |              | Unique device ID for the sensor. Does not change between power cycles. (Invalid: 0 if not available) |
| firmware_version | `char[24]` |              |                                                                                                      | Firmware version. (Invalid: empty if not available)                          |
| hardware_version | `char[24]` |              |                                                                                                      | Hardware version. (Invalid: empty if not available)                          |
| serial_number    | `char[33]` |              |                                                                                                      | Device serial number or unique identifier. (Invalid: empty if not available) |

## Enums

### DEVICE_TYPE {#DEVICE_TYPE}

| Name                                                                              | Type    | Value | Description            |
| --------------------------------------------------------------------------------- | ------- | ----- | ---------------------- |
| <a id="#DEVICE_TYPE_GENERIC"></a> DEVICE_TYPE_GENERIC                             | `uint8` | 0     | Generic/unknown sensor |
| <a id="#DEVICE_TYPE_AIRSPEED"></a> DEVICE_TYPE_AIRSPEED                           | `uint8` | 1     | Airspeed sensor        |
| <a id="#DEVICE_TYPE_ESC"></a> DEVICE_TYPE_ESC                                     | `uint8` | 2     | ESC                    |
| <a id="#DEVICE_TYPE_SERVO"></a> DEVICE_TYPE_SERVO                                 | `uint8` | 3     | Servo                  |
| <a id="#DEVICE_TYPE_GPS"></a> DEVICE_TYPE_GPS                                     | `uint8` | 4     | GPS                    |
| <a id="#DEVICE_TYPE_MAGNETOMETER"></a> DEVICE_TYPE_MAGNETOMETER                   | `uint8` | 5     | Magnetometer           |
| <a id="#DEVICE_TYPE_PARACHUTE"></a> DEVICE_TYPE_PARACHUTE                         | `uint8` | 6     | Parachute              |
| <a id="#DEVICE_TYPE_RANGEFINDER"></a> DEVICE_TYPE_RANGEFINDER                     | `uint8` | 7     | Rangefinder            |
| <a id="#DEVICE_TYPE_WINCH"></a> DEVICE_TYPE_WINCH                                 | `uint8` | 8     | Winch                  |
| <a id="#DEVICE_TYPE_BAROMETER"></a> DEVICE_TYPE_BAROMETER                         | `uint8` | 9     | Barometer              |
| <a id="#DEVICE_TYPE_OPTICAL_FLOW"></a> DEVICE_TYPE_OPTICAL_FLOW                   | `uint8` | 10    | Optical flow           |
| <a id="#DEVICE_TYPE_ACCELEROMETER"></a> DEVICE_TYPE_ACCELEROMETER                 | `uint8` | 11    | Accelerometer          |
| <a id="#DEVICE_TYPE_GYROSCOPE"></a> DEVICE_TYPE_GYROSCOPE                         | `uint8` | 12    | Gyroscope              |
| <a id="#DEVICE_TYPE_DIFFERENTIAL_PRESSURE"></a> DEVICE_TYPE_DIFFERENTIAL_PRESSURE | `uint8` | 13    | Differential pressure  |
| <a id="#DEVICE_TYPE_BATTERY"></a> DEVICE_TYPE_BATTERY                             | `uint8` | 14    | Battery                |
| <a id="#DEVICE_TYPE_HYGROMETER"></a> DEVICE_TYPE_HYGROMETER                       | `uint8` | 15    | Hygrometer             |

## Source Message

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

::: details Click here to see original file

```c
# Device information
#
# Can be used to uniquely associate a device_id from a sensor topic with a physical device using serial number.
# as well as tracking of the used firmware versions on the devices.

uint64 timestamp  # time since system start (microseconds)

uint8 device_type  # [@enum DEVICE_TYPE] Type of the device. Matches MAVLink DEVICE_TYPE enum
uint8 DEVICE_TYPE_GENERIC = 0                 # Generic/unknown sensor
uint8 DEVICE_TYPE_AIRSPEED = 1                # Airspeed sensor
uint8 DEVICE_TYPE_ESC = 2                     # ESC
uint8 DEVICE_TYPE_SERVO = 3                   # Servo
uint8 DEVICE_TYPE_GPS = 4                     # GPS
uint8 DEVICE_TYPE_MAGNETOMETER = 5            # Magnetometer
uint8 DEVICE_TYPE_PARACHUTE = 6               # Parachute
uint8 DEVICE_TYPE_RANGEFINDER = 7             # Rangefinder
uint8 DEVICE_TYPE_WINCH = 8                   # Winch
uint8 DEVICE_TYPE_BAROMETER = 9               # Barometer
uint8 DEVICE_TYPE_OPTICAL_FLOW = 10           # Optical flow
uint8 DEVICE_TYPE_ACCELEROMETER = 11          # Accelerometer
uint8 DEVICE_TYPE_GYROSCOPE = 12              # Gyroscope
uint8 DEVICE_TYPE_DIFFERENTIAL_PRESSURE = 13  # Differential pressure
uint8 DEVICE_TYPE_BATTERY = 14                # Battery
uint8 DEVICE_TYPE_HYGROMETER = 15             # Hygrometer

char[80] name # Name of device e.g. DroneCAN node name

uint32   device_id         # [-] [@invalid 0 if not available] Unique device ID for the sensor. Does not change between power cycles.
char[24] firmware_version  # [-] [@invalid empty if not available] Firmware version.
char[24] hardware_version  # [-] [@invalid empty if not available] Hardware version.
char[33] serial_number     # [-] [@invalid empty if not available] Device serial number or unique identifier.
```

:::