基于MQTT的OPCUA快速开发

OPC Day International 2024June 17th–21st, 2024Randy ArmstrongChair of OPC UA Security Working Grouprandy.armstrong@opcfoundation.orgOPC Day International 2024June 17th – 21st, 2024Client-Server => tightly coupled applications.◦Browsing address space to discover;◦Client specific subscriptions.◦Subscriptions change frequently.◦Need to call Methods.PubSub => loosely coupled applications.◦No need to browse;◦Many Clients can use same subscription;◦Subscriptions change rarely;◦Limited need for Methods.ClientServerPublisherSubscriberSubscriberSubscriberMQTTBrokerOPC Day International 2024June 17th – 21st, 20243PubSub may be an add-on to a Server.A Publisher is a Client subscribing for data which is it re-publishes.A Client is used to configure the Publisher.Same data and information models can be published with PubSubClientServerPublisherSubscriberPubSubConfigurationSubscriberSaved In StorageIndustrial ProcessMQTTBrokerOPC Day International 2024June 17th – 21st, 20244PubSub stands on i