# Vicki LoRaWAN Device communication protocol

## Foreword

In the current section, we explain in detail what are the specific commands that the device supports. 

If you want to make yourself familiar with the details of how this device operates, please read through all articles.

## Communication concepts related to LoRaWAN standard

* Supported LoRaWAN MAC protocol version: 1.0.3;
* Supported LoRaWAN device class: A;
* LoRaWAN MAC Port: 
  * Uplinks: 2. 
  * **Downlinks: 1, 2, 4-223;**
* Maximum application payload size: Maximum allowed by document “LoRaWAN regional parameters” for DataRate 0 for the given region. In most of the cases this is 51 bytes;
* Consult the document “LoRaWAN regional parameters” for additional technical information (Especially for RX2 window timings);

## Document versions history

<table data-header-hidden><thead><tr><th width="186.73211781206172">Date</th><th width="150">Version</th><th width="163">Author</th><th>Comment</th></tr></thead><tbody><tr><td><strong>Date</strong></td><td><strong>Version</strong></td><td><strong>Author</strong></td><td><strong>Comment</strong></td></tr><tr><td>7 May 2020</td><td>V1.0</td><td>Martin Peevski</td><td>Initial draft</td></tr><tr><td>8 May 2020</td><td>V1.1</td><td>Milan Stefanov &#x26; Lyubomir Yanchev</td><td><p>Document review;</p><p>Message examples inclusion.</p></td></tr><tr><td>20 May 2020</td><td>V1.2</td><td>Martin Peevski</td><td>Added general information and more supported commands.</td></tr><tr><td>20 May 2020</td><td>V1.3</td><td>Milan Stefanov &#x26; Lyubomir Yanchev</td><td>Document review and visual edits.</td></tr><tr><td>27 May 2020</td><td>V1.4</td><td>Lyubomir Yanchev</td><td>Document general formatting.</td></tr><tr><td>15 June 2020</td><td>V1.5</td><td>Martin Peevski</td><td>All chapters updated; Added support to read all commands parameters (GET commands).</td></tr><tr><td>11 August 2020</td><td>V1.6</td><td>Martin Peevski</td><td><p>Chapters updated:</p><ul><li><a href="communication-concepts#communication-concepts-related-to-lorawan-standard">Communication concepts related to LoRaWAN standard</a></li><li><a href="keep-alive#set-keep-alive-period-command-explanation">Keep-alive period set command explanation</a></li><li><a href="uplink-types#set-uplink-messages-type-command-explanation">Set uplink messages type command explanation</a></li></ul><p>Added new commands </p><ul><li><a href="network-related-settings#set-device-radio-communication-watch-dog-parameters-command-explanation">Set WDP parameters</a></li><li><a href="network-related-settings#get-device-radio-communication-watch-dog-parameters-command-explanation">Get WDP parameters</a></li></ul></td></tr><tr><td>28 September 2020</td><td>V1.7</td><td>Martin Peevski</td><td><p>Updated chapters </p><ul><li><a href="operational-modes-and-temperature-control-algorithm#set-internal-temperature-control-algorithm-parameters">Set internal temperature control algorithm parameters</a></li><li><a href="operational-modes-and-temperature-control-algorithm#set-internal-temperature-control-algorithm-parameters-tdiff-only">Set internal temperature control algorithm parameters – Tdiff only</a></li><li><a href="operational-modes-and-temperature-control-algorithm#get-internal-temperature-control-algorithm-parameters">Get internal temperature control algorithm parameters</a></li><li><a href="operational-modes-and-temperature-control-algorithm#get-internal-temperature-control-algorithm-parameters-tdiff-only">Get internal temperature control algorithm parameters – Tdiff only</a></li></ul><p>Added new commands </p><ul><li><a href="operational-modes-and-temperature-control-algorithm#set-device-primary-operational-mode">Set device primary operational mode</a></li><li><a href="operational-modes-and-temperature-control-algorithm#get-device-primary-operational-mode">Get device primary operational mode</a></li></ul></td></tr><tr><td>15 December 2021</td><td>Version notes deprecated</td><td>Lyubomir Yanchev</td><td>We've decided to switch to a cleaner view of the release notes and separate them in a special page. <a href="release-notes">See the Release notes here.</a></td></tr></tbody></table>