.. _headlabel-refx-data-12:

Data 12 (Speed)
===============

The frame format of the Data **12** unit is as follows:

.. code-block:: none

   For example (Total 4 bytes):
   0C 02 01 7D

.. tabularcolumns:: |p{3.2em}|p{11.2em}|p{5.8em}|p{14em}|p{4.8em}|

.. table::
   :width: 100%
   :widths: auto

   +---------+--------------------------------------------+---------------+---------------------------------------------+--------------+
   | Parts   | Fields                                     | Length (Byte) | Range/Format                                | Default      |
   +=========+============================================+===============+=============================================+==============+
   | ID      | Data ID                                    | 1             | 0CH (12)                                    | 0CH (12)     |
   +---------+--------------------------------------------+---------------+---------------------------------------------+--------------+
   | Length  | Data Length                                | 1             | 00H or 02H                                  |              |
   +---------+--------------------------------------------+---------------+---------------------------------------------+--------------+
   | Content | `Speed`                                    | 2             | 0000H-FFFFH (\*0.1 km/h)                    |              |
   +---------+--------------------------------------------+---------------+---------------------------------------------+--------------+

- `Speed`

  The speed is obtained from the GNSS.

  Speed over ground, expressed as a 16-bit unsigned integer and the unit is 0.1 km/h.

  For example, 017DH (i.e., 381) means speed 38.1 km/h.

.. note:: This data ID may have different meanings in different reports or records. Please refer to the corresponding record ID for the specific meaning. If there is no clear description, it indicates the speed when the report or record was generated.