Hi, Can you help me understand more about the "secure" part? It is indeed outbound (device to broker) during publish, but in order for subscribers to receive from the broker, wouldn't that be "inbound"? I am asking as someone not familiar with the underlying mechanism of mqtt, just a general idea of how pub sub works and the broker. Thanks!
4 months ago | 0
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𝗪𝗵𝗮𝘁 𝗶𝘀 𝗠𝗤𝗧𝗧? 𝗧𝗵𝗲 𝗙𝗼𝘂𝗻𝗱𝗮𝘁𝗶𝗼𝗻 🚀
Understanding MQTT (Message Queuing Telemetry Transport) is essential for anyone involved in industrial automation and digital transformation. Let's break it down:
🔍 𝗪𝗵𝗮𝘁 𝗶𝘀 𝗠𝗤𝗧𝗧?
MQTT is a lightweight, publish-subscribe network protocol that transports messages between devices. Invented in the late 1990s by Arlen Nipper and Andy Stanford-Clark, it was designed to address challenges in the oil and gas industry, especially for monitoring remote assets over unreliable networks.
⚙️ 𝗞𝗲𝘆 𝗘𝗹𝗲𝗺𝗲𝗻𝘁𝘀:
• MQTT Broker: The central hub where all messages pass, organizing data in a topic namespace and ensuring efficient distribution.
• MQTT Client: Devices that send (publish) or receive (subscribe) messages. Each client can publish data to the broker and subscribe to receive updates.
🔗 𝗛𝗼𝘄 𝗗𝗼𝗲𝘀 𝗠𝗤𝗧𝗧 𝗪𝗼𝗿𝗸?
• Topic and Payload: Data is organized into topics, each with an associated payload (e.g., topic: site1/temp, payload: 71°F).
• Publish-Subscribe Model: Devices publish data to the broker, which distributes it to subscribed clients, reducing network traffic.
• Report by Exception: Clients publish updates only when data changes, optimizing bandwidth usage.
✨ 𝗪𝗵𝗮𝘁 𝗶𝘀 𝗠𝗤𝗧𝗧? 𝗧𝗵𝗲 𝗙𝗼𝘂𝗻𝗱𝗮𝘁𝗶𝗼𝗻
• Lightweight and Efficient: Ideal for low-bandwidth, high-latency networks.
• Scalable: Supports massive deployments with millions of devices.
• Secure: Uses outbound-only connections from clients to the broker, minimizing exposed ports and enhancing security.
📈 𝗨𝘀𝗲 𝗖𝗮𝘀𝗲 𝗘𝘅𝗮𝗺𝗽𝗹𝗲:
In a plant, MQTT clients on devices (e.g., temperature sensors, flow meters) publish data to an MQTT broker. A central system subscribes to this data to monitor and analyze operations in real-time. New clients can be added easily, and the system scales seamlessly.
8 months ago | [YT] | 39