Optional ReadonlyauthenticationAuthentication data
Optional ReadonlyauthenticationAuthentication method
Optional ReadonlymaximumMaximum packet size client will accept
Optional ReadonlyreceiveReceive maximum (inflight QoS > 0 messages)
Optional ReadonlyrequestRequest problem information
Optional ReadonlyrequestRequest response information
Optional ReadonlysessionSession expiry interval (seconds)
Optional ReadonlytopicTopic alias maximum
Optional ReadonlyuserUser properties
CONNECT properties (MQTT 5.0).