.. _headlabel-refx-data-181:

Data 181 (Scanned WID3xx Beacon Data)
=====================================

The Beacons information collected by terminal. Each Beacon occupies 10 bytes, including Type, MAC, RSSI, Voltage.

**Note**: WID3xx Beacon refers to WID310.

The frame format of the Data **181** unit is as follows:

.. code-block:: none

   For example (Total 14 bytes):
   80 B2 0B 01 0C 12 34 56 78 90 AB BB 0C 80

.. tabularcolumns:: |p{3.2em}|p{7.4em}|p{4.8em}|p{5.8em}|p{12em}|p{5.8em}|

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

   +---------+-------------------------+---------------------+---------------+------------------------------------------+--------------+
   | Parts   | Fields                                        | Length (Byte) | Range/Format                             | Default      |
   +=========+=========================+=====================+===============+==========================================+==============+
   | ID      | Data ID                                       | 2             | 80B5H (181)                              | 80B5H (181)  |
   +---------+-------------------------+---------------------+---------------+------------------------------------------+--------------+
   | Length  | Data Length                                   | 1 or 2        | 00H-7FH or 8080H-80FFH                   |              |
   +---------+-------------------------+---------------------+---------------+------------------------------------------+--------------+
   | Content | `Number`                                      | 1             | 00H-FFH                                  |              |
   +         +-------------------------+---------------------+---------------+------------------------------------------+--------------+
   |         | The first Beacon        | `Type`              | 1             |                                          |              |
   +         +                         +---------------------+---------------+------------------------------------------+--------------+
   |         |                         | `MAC`               | 6             |                                          |              |
   +         +                         +---------------------+---------------+------------------------------------------+--------------+
   |         |                         | `RSSI`              | 1             | 80H-FFH (dBm)                            |              |
   +         +                         +---------------------+---------------+------------------------------------------+--------------+
   |         |                         | `Voltage`           | 2             | 0000H-FFFFH (mV)                         |              |
   +         +-------------------------+---------------------+---------------+------------------------------------------+--------------+
   |         | ...                                           |               |                                          |              |
   +---------+-------------------------+---------------------+---------------+------------------------------------------+--------------+

- `Number`

  Indicates how many Beacons the following data comes from.

  If the value of this field is 00H, no other fields are included.

- `Type`

  Indicates the type of the Beacon. It is refer to the parameter 'Type' in :ref:`AT@BTBCN <headlabel-refx-cmd-btbcn>` command.

  For example, 0DH (i.e, 13) means the type is WID310.

- `MAC`

  The MAC address of a Beacon.

  For example, 1234567890ABH means the MAC address 12:34:56:78:90:AB.

- `RSSI`

  The received signal strength.

  Expressed as an 8-bit signed integer and the unit is dBm.
  When the RSSI value is less than -128 (80H), it is also filled in as 80H, and when the RSSI value is greater than -1 (FFH),
  it is also filled in as FFH. In particular, 63H means the signal strength is not known or not detectable.

  Typical values are as follows:

  +-------------+-------------------------------+---------+
  | Value       | Signal Strength (dBm)         | Level   |
  +=============+===============================+=========+
  | A7H to 80H  | -89 or less                   | 0       |
  +-------------+-------------------------------+---------+
  | A8H to ADH  | -88 to -83                    | 1       |
  +-------------+-------------------------------+---------+
  | AEH to B4H  | -82 to -76                    | 2       |
  +-------------+-------------------------------+---------+
  | B5H to BEH  | -75 to -66                    | 3       |
  +-------------+-------------------------------+---------+
  | BFH to FFH  | -65 or greater                | 4       |
  +-------------+-------------------------------+---------+
  | 63H         | Not known or not detectable   | /       |
  +-------------+-------------------------------+---------+

- `Voltage`

  The current battery voltage of the Beacon.

  Expressed as a 16-bit unsigned integer and the unit is mV. In particular, 7FFFH means that the terminal cannot obtain this data currently.

  For example, 0C80H means 3200mV.