MQTT Client¶

The MQTT protocol is intended primarily for the exchange of data between Internet of Things devices and servers and client devices, eg smartphones.

Its main advantage is maintaining a connection in both directions, thanks to which it is possible to easily control the Lan Controller in the local network from the telephone in the operator's local network.

Elements of page¶

1. Connection status with the MQTT broker.
2. A part of MAC address of the device that the client uses as a clientID when connecting to the broker.
3. Connection configuration form.
   • Enabling the MQTT client.
   • Enable user/password authentication.
   • Use TLS.
   • Use LWT (to publish connection state on prefix/connected topic, 1 - connected, 0 - disconnected).
   • Send by GSM modem (instead of Ethernet connection).
   • The server address can be given as the IP address or the host name.
   • The communication port, used by default for connections without encryption, is 1883.
   • Login/username used for authentication.
   • Password used for authentication.
   • Prefix is ​​a base part of the topics used by LK. All sending topics and subscription topic begin with the prefix.
   • It defines period of time between consequent send of data selected in section 4.
   • Specifies the keep-alive parameter for the connection.
4. Reading fields that can be sent by LK periodically (mark the desired readings).
5. Readings that will be sent on change.
6. Buttons for saving settings and a link to mqtt.ats.pl, which allows you to use the MQTT client on LK.