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Using MQTT for IIOT Apps

A publish-subscribe network protocol is MQTT. It is the best protocol for M2M since it sends messages (which can be commands or data) between devices (machine to machine). The Industrial Internet of Things (IIoT), the Internet of Things (IoT), Facebook Messenger, and other systems frequently use MQTT. Using port 8883 and MQTT 3.1.1, devices can communicate with the Azure IoT Hub device endpoints.

Azure IoT Hub does not comply with all of the MQTT v3.1.1 standard’s behaviors and is not a fully working MQTT broker. To increase the efficiency of the Azure IoT Hub, supported MQTT behavior is used.

IoT technology attempts to gather all sensor data in real-time, and the collected information is delivered to a central cloud-based service, which is combined with other data and then helpfully shared with end users. And the IIoT, also known as Industry 4.0, is the application of the IoT to the manufacturing sector.

How do MQTT works?

When a device publishes a message with a particular subject, the news is hosted by the message broker MQTT Broker, and another device can then subscribe to the topic to receive the message. Each device can send and receive notifications simultaneously, but they cannot be realized without a broker.

In this scenario, the clients are a temperature sensor, a computer, and a mobile device. It can be classified as an MQTT Broker and an MQTT Client.

Using MQTT for IIOT Apps

Manufacturers can access data from the machinery and base decisions on it, thanks to IIoT hardware and software. A distributed control system (DCS) that uses cloud computing to improve and optimize process controls has evolved into the IIoT, allowing for a higher level of automation.

MQTT might offer a reliable, secure means to gather valuable data from production equipment.

The Industrial Internet of Things (IIoT) solution known as Ignition IIoT by Inductive Automation combines the limitless data collecting and development capabilities of the Ignition industrial application platform with the incredible efficiency of the MQTT data-transfer protocol.

With Ignition, you can quickly connect to plant-floor and field devices at the network’s edge and send data from thousands of devices across several sites to industrial and business applications.

MQTT has been recognized as an open, scalable, and simple way for IIoT developers to strike the appropriate balance as IIoT applications impact industries on a large scale.

It offers a wide range of functionality to fulfill the needs of IIoT users because of its publisher/subscriber architecture, which only has three functions (publisher, broker, and subscriber). It is a simple and adaptable protocol that ensures effective device interaction no matter how many there are.

Unlike other IIoT protocols, MQTT achieves this efficiency by employing a fundamentally different communication paradigm.

MQTT creates a shared server, or broker, as the endpoint for all applications and field devices, instead of making several one-to-one connections between master programs and agent devices and then polling those devices continuously for information.

MQTT is the kind of protocol that plant engineers are seeking since its publish-subscribe communication paradigm enables many-to-many, dependable connectivity with less total network traffic.

Additionally, it is safer than other methods. Data access rights for the entire network may be managed in one place since the MQTT broker is the lone node in charge of routing all traffic. Additionally, it supports SSL/TLS encryption, allowing for the secure routing of its communications across public networks. All of the significant cloud IoT platforms use MQTT as their standard.

Simply put, MQTT works well with the idea of an IIoT system, where devices talk to one another. These could be field devices that only publish data or more sophisticated devices like PLCs that must publish and subscribe to data.


Since it transmits messages (which can be commands or data) between devices, MQTT is the best M2M protocol (machine to machine). The application of the IoT to the manufacturing industry is known as the Industrial Internet of Things (IIoT). MQTT may provide a dependable, secure way to get all these valuable data from production machinery. You may deliver data from thousands of devices from numerous sites to industrial and business applications by connecting to plant-floor and field devices at the network’s edge using Ignition. For IIoT developers, MQTT has been acknowledged as an open, scalable, and straightforward method of striking the right balance. No matter how many devices there are, successful device interaction is ensured by this specific and adaptive protocol.

Additionally, you can use, a self-service IoT platform that enables you to create valuable Azure IoT Hub goods and services. By drastically decreasing the burden and complexity, is confident in its capacity to assist businesses in developing IoT solutions.

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