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The SmartServer runs (versions may be newer):
Ubuntu Linux version 2420.04 LTS (with SmartServer 4.6 and higher)
MQTT protocol version 3.1.1
...
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The SmartServer runs (versions may be newer):
Ubuntu Linux version 2420.04 LTS (with SmartServer 4.6 and higher)
MQTT protocol version 3.1.1
...