Connection

General connection parameters like host and port number. Depending on the configuration a redundant connection can also be configured.

Publisher Connection

Type
Allows to define the connection type.
  • Unsecure
  • TLS
  • WebSocket
  • TLS-PSK
Host:Port
The IP address (and port) for the MQTT broker.

MQTT Broker Connections

MQTT Broker - Host:Port
  • Unsecure: 127.0.0.1:1883
  • TLS: secureBroker.com:8883
  • WebSocket: ws://www.example.com/mqtt
Protocol
The MQTT protocol used for the communication. Supported protocols are:
  • Default
  • v3.1
  • v3.1.1
  • v5.0
Username
User name to access the broker, if necessary.
Password
Password to access the broker, if necessary.
Certificate
If connection type TLS is defined, the certificate of the broker that the client shall trust must be entered here.
In case of connection type WebSocket no certificate must be defined. However, the broker's root certificate must be installed on the client computer as trusted certificate.
PSK Identity
The identity that should be used for the pre-shared key defined within the PSK textfield.
Remember: The option is only used if the connection type TLS-PSK is used.
PSK
The pre-shared key that is used for the connection and stored as encrypted string.
Remember: The option is only used if the connection type TLS-PSK is used.
TLS Version
The TLS version that should be used for the connection.
Remember: The option is only used if the connection type TLS-PSK is used.
Restriction: Due to restrictions of the Qt-Framework the TLS version 1.3 cannot be used for PSK based communication.