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Servers and Sets can be configured for MQTT Transmission and MQTT Engine

Note

MQTT Engine Server Sets were added in module release v4.0.22

Servers

The Servers tab allows you to configure a list of the MQTT Servers that the MQTT module should connect to.

Multiple MQTT Servers can be configured - often times more than one will be configured to handle fail-over in redundant or geographically distributed systems. 

Sets

The Sets tab allows you to configure server sets.

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Server sets cannot have common elements meaning that a single MQTT server cannot be in more than one set.

Example

In the configuration below we have setup two server sets - one has two server configurations associated with it and one has three server configurations.

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A single connection is made to the first available server in each set. If this server becomes unavailable, MQTT Transmission will attempt to establish a connection with the next server in the set. If unsuccessful, it will continue to walk through the servers in the set until a connection can be made.

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