了解MQTT的可能性以及如何使用它来解锁OPC系统提供的所有价值。
Why MQTT?
经过now, you’ve probably heard about MQTT. Since its creation in the late ’90s, it’s become the most popular protocol for IoT applications, repeatedly touted by organizations like the Eclipse Foundation, big players in cloud services like Microsoft and Amazon Web Services, and influential automation vendors like Inductive Automation.
MQTT最初是为SCADA设计的，继续在早期的智能基础架构和消费者IoT消息传递应用程序中建立立足点，然后在自动化世界中重新出现，以推动OT和IT系统之间的更大连接。
MQTT是免费和开源的，因此可以轻松实验其轻巧，可扩展的体系结构，以共享跨域的数据。对于许多IT工程师来说，这也很容易保护和熟悉，这意味着您将少批准项目的麻烦。
But what about OPC UA?
However, for most automation engineers, MQTT is an unknown quantity. Besides the perception that MQTT is relatively new, it’s not one of the standard specifications promoted by popular automation vendors or industry collaborations, like the OPC Foundation. This fuels the debate around whether MQTT or a protocol like OPC UA should get preference in these connected industrial applications.
Here’s the first thing you should know about that debate:Don’t worry about it.
OPC UA and MQTT actually work together beautifully. With the right tools, you can gain all the benefits of MQTT’s open, secure architecture and easily integrate all the data from your existing OPC UA hardware and software.
So is this a rip-and-replace deal or what?
您应该知道的第二件事是这不是替换所有现有系统的建议。尽管始终弹出更多可MQTT的传感器和设备，但它完全合适，甚至建议，以使您现有的OPC基础架构保持在适当的位置。
MQTT制作出出色的数据共享骨干，但是将现有的自动化系统完全转换为MQTT是不可行或建议的。取而代之的是，您可以遵循一个简单的模式，以与现有的OPC UA系统并行扩展新的MQTT基础架构。
To see this pattern in detail,下载我们的白皮书，“工业强度MQTT/SparkPlug B：通过边缘计算进行大规模构建工业MQTT网络。”
这在生产中是什么样的？
Opto 22’s recommended approach to building industrial MQTT infrastructure relies on a related concept to IIoT called industrial edge computing, which facilitates connectivity and data processing by distributing those functions at the edge of the network.
该体系结构使您可以在使用点连接现有的OPC UA系统（甚至是专有协议）不修改现有的控制系统或基础架构。
Below, you can see a high-level illustration of what the pattern looks like when all the components are brought together.
在我们的白皮书中，您将学习如何使用MQTT和Edge计算来在现场的数据生产者和整个组织的数据消费者之间有效共享数据，无论他们是否本地化MQTT。
The paper also explains:
- MQTT协议的基本面
- How the Sparkplug B specification adapts MQTT to industrial applications
- MQTT和SparkPlug B内置的安全性和容忍度措施
我如何保持技术曲线的领先地位？
MQTT是物联网最受欢迎的协议，并正在迅速进入工业应用程序。
As founding members of the OPC Foundation和Opto 22拥有使用MQTT协议的广泛产品体验，专门为工程师，开发人员和数字转换引线设计了此白皮书，他们需要开发其系统以进行可扩展，安全的数据分发。
It includes all our expertise from 48 years of automation experience and close partnerships with influential MQTT contributors like Inductive Automation, HiveMQ, and MQTT’s co-inventor, Arlen Nipper.
We’ve watched the progress towards increasingly more connected automation systems and want to help you get all the information you need to get started on your own MQTT journey.
无论年龄如何，您都不需要替换OPC系统即可这样做。
In fact, using our approach, you can seamlessly convert OPC tags into MQTT topics and back, wherever your application requires it.
Is MQTT worth the investment?
对于行业伟大的约翰·里纳尔迪（John Rinaldi）来说，答案曾经是一个相当响亮的“不”但是即使他最近（并尊重）改变了方面：
“[The] market has spoken, and it hasn’t chosen what I proposed. In fact, the market has run from my advice. In fact, it has galloped, dashed, raced and hurried to do the opposite: implement MQTT by the boatload. So, today I capitulate and become an MQTT supporter.”
这是我们的一些客户在MQTT上构建数据基础架构的话：
“We disconnected a controller and within a millisecond the system reported the failure. It really is that easy: change a variable and it shows up in the broker, then on your mobile phone.透明
- 沃特福德镇DPW工程总监弗兰克·费舍尔（Frank Fisher）。
“MQTT的工作较少，因此在工程时间上花费的钱减少了……这是自动化的透明
— Kevin Finkler, Software Engineer, Perceptive Controls
Is MQTT a magic bullet, though? Definitely not. It still takes plenty of engineering talent to understand and implement an MQTT-based data network in a way that is secure and scalable.
Get started today by downloading our white paper or checking out our otherresources on industrial MQTT。
MQTT RESOURCESFiled Under:Opto 22
