install_22_4_mqtt [RADIUSdesk]

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====== MQTT real-time support for MESHdesk and APdesk ======

===== Install Mosquitto =====
  *  Install the Mosquitto MQTT broker according to these detailed instructions:
        * https://www.vultr.com/docs/install-mosquitto-mqtt-broker-on-ubuntu-20-04-server/
  *  Make sure you perform **step 3** to secure the application with username and password.
  *  In this document we use the username and password of **openwrt**, please change them according to your needs.

<alert type="info">
  * Please use a secure password for the MQTT user in a production environment.
</alert>


===== Install Rdcore-API-Gateway =====
  * The Rdcore API Gateway is a Node.js application. We start with the installation of Node.js and npm.
<code bash>
sudo apt install nodejs
sudo apt install npm
</code>
  * Change to the /opt directory
<code bash>
cd /opt
</code>
  * Clone Rdcore API Gateway from Github
<code bash>
sudo git clone https://github.com/RADIUSdesk/Rdcore-API-Gateway.git
</code>
  * Change to the newly cloned directory
<code bash>
cd /opt/Rdcore-API-Gateway
</code>
  * Install NPM dependencies
<code bash>
sudo npm install
</code>
  * Rename **.env.sample** to **.env** and edit
<code bash>
sudo mv .env.sample .env
sudo vi .env

PORT=8001
#FQDN of your installed server
MESH_CONTROLLER="http://cloud.mesh-manager.com"
MQTT_BROKER="127.0.0.1"
MQTT_PORT=1883
MQTT_USER=openwrt
MQTT_PASS=openwrt

</code>
  * The Rdcore API gateway systemd startup file
<code bash>
sudo cp /opt/Rdcore-API-Gateway/rdcore-api-gateway.service /lib/systemd/system/
</code>
  * Activate the Rdcore API Gateway
<code bash>
sudo systemctl enable rdcore-api-gateway.service
</code>
  * Start the Rdcore API gateway
<code bash>
sudo systemctl start rdcore-api-gateway.service
sudo systemctl status rdcore-api-gateway.service
</code>
  * Confirm that the service is running by calling the FQDN:8001
  * e.g http://cloud.radiusdesk.com:8001/

===== MQTT settings in RADIUSdesk =====
  *  To activate MQTT on RADIUSdesk, you must configure it in two places.
  * For the devices managed by MESHdesk and APdesk there is this GUI under **Settings** -> **MQTT**

{{:getting_started:mqtt_settings.png|}}
  * Command topic is always **/RD/NODE/COMMAND/RESPONSE**
  * To enable the server to use MQTT instead of the heartbeat system, you must edit the following configuration file.
  * Edit **/var/www/html/cake4/rd_cake/config/MESHdesk.php**
  * Search for these sections and adapt them to the values of your server.
<code php>
$config['mqtt_settings']['enable_realtime']	= true;
$config['mqtt_settings']['api_gateway_url']	= 'http://164.160.89.129:8001';
</code>