The Ultimate Guide to Industrial IoT Protocols

Most stakeholders in Internet of Things projects are mainly concerned with getting data from their devices to their dashboards. They rarely consider the data’s end-to-end journey.

To find possible areas for optimization and raise the performance of your deployment, it is crucial to understand how your data is acquired and moving into system. By doing this, you can make sure that the technical solution you use for the business issue that IoT is meant to address is the best one possible.

The communication between device-to-device and device-to-cloud is done using set of protocols. Most protocols have their own advantages and disadvantages, and while some are suitable for IoT, others are not. In this blog, we will know what are IoT Protocols and discuss some of the main IoT protocols that are adopted in the industry for IoT.

Introduction to IIoT Protocols

Protocols are a collection of guidelines for sending and receiving data between electronic devices in accordance with a predetermined understanding of the information structure.

IoT protocols are standards that allow data to be exchanged and transmitted between the Internet and edge devices. This is so that all of those different devices can share data or send instructions to one another, which is made possible via the Internet of Things (IoT) protocols.

Additionally, end users are able to extract helpful information, communicate with, and operate gadgets using these conveyed bits of data and commands.

Various IIoT Protocols for Industrial Applications


Wi-Fi is a widely used protocol that is present in practically every setting, including homes, businesses, and even local eateries. Large amounts of data can be sent over short distances using this commonly used technology. Wi-high Fi’s power consumption rate, however, makes it doubtful that many low-power or battery-powered IoT devices will adopt it.


Bluetooth is mostly used for point-to-point, close-quarters data transmission. Bluetooth is frequently used in the Internet of Things (IoT) to link tiny battery-operated sensors to IoT gateways or to enable communication with a smartphone, eBike, or other smart devices.


Given that Hypertext Transfer Protocol serves as the backbone of data transfer for the World Wide Web, you may be able to recognize this abbreviation as it appears at the start of every URL address you write. As this protocol needed all the devices to be online at once, it is also frequently used in IoT networks that function within a system that is continually connected to the internet.


The communication protocol known as LoRaWAN uses LoRa (Long Range) to link devices to a network. This particular LPWAN standard was developed for IoT applications. It operates effectively inside and consumes very little power. You must set up and manage your own infrastructure, though, unless you can locate a LoRaWAN vendor who offers coverage in the region where you’re deploying. When you are on several deployments, this can be particularly difficult.


NFC stands for Near Field communication. It permits close-range communication between compatible devices. The signal must be transmitted using at least two transmitting and receiving devices.


In a mesh IoT network, devices are directly connected to one another in a non-hierarchical method to transmit data across the network. A mesh network’s components interact using a predetermined protocol that enables each device to take part in the network’s data transmission.


ZigBee stands out as a dependable, affordable, and low-power wireless network technology. The standard is flexible and supports a variety of network topologies, including point-to-point, point-to-multipoint, and mesh networks. The most typical scenarios for ZigBee applications are in a home or building automation.


HART is a two-way communication protocol that enables data access between host systems and smart field equipment. Any software program, including those on a technician’s laptop or handheld device, a plant’s process control, asset management, safety, or other system using any control platform, are all examples of hosts. A wireless communications technology for applications involving process automation is called WirelessHART. While keeping existing HART tools, commands, and devices compatible, it gives HART technology wireless capabilities.

Message Queue Telemetry Transport (MQTT)

One of the most popular protocols for IoT devices, MQTT provides remote device monitoring and collects data from a variety of electronic devices. It facilitates event-driven message exchange across wireless networks because it is a subscribe/publish protocol that runs over Transmission Control Protocol (TCP). MQTT is mostly utilized in low-cost, power- and memory-intensive devices. Examples include text-based chat apps, smart watches, auto sensors, and fire detectors.

Constrained Application Protocol (CoAP)

CoAP is a restricted device internet utility protocol. The client can use this protocol to communicate requests to the server, and the server can use HTTP to communicate responses to the client. It uses less space and uses UDP (User Datagram Protocol) for implementation which is lightweight. The protocol uses the EXL binary data format (Efficient XML Interchanges). The CoAP protocol is mostly utilized in microcontrollers, mobile devices, and automation. The protocol requests services and resources from the application’s endpoints, such as home appliances, and then returns a response.

Advanced Message Queuing Protocol (AMQP)

AMQP is a routing and queuing software layer protocol for message-oriented middleware environments. It provides seamless and secure data sharing between connected devices and the cloud and is utilized for dependable point-to-point connections. The three components of AMQP are Exchange, Message Queue, and Binding. These three elements work together to guarantee a safe and effective message exchange and storage. Additionally, it aids in demonstrating how one message relates to another.

Machine-to-Machine (M2M) Communication Protocol

It is an open industry protocol designed to offer IoT device remote application management. M2M communication protocols employ open networks and are economical. It establishes a setting in which two machines can converse and exchange information. This protocol promotes machine self-monitoring and enables systems to change in response to their surroundings. Smart homes, automatic vehicle authentication, vending machines, and ATMs all use M2M communication protocols.

Extensible Messaging and Presence Protocol (XMPP)

The XMPP has a distinctive design. It exchanges messages in real-time using a push method. XMPP is adaptable and can effortlessly incorporate changes. Extensible Markup Language (XML) was used in the development of XMPP, which functions as a presence indicator by displaying the availability state of the servers or devices sending or receiving messages. XMPP is used in online gaming, news websites, and Voice over Internet Protocol in addition to instant messaging apps like Google Talk and WhatsApp (VoIP).

Data Distribution Service (DDS)

It is an IoT Data Protocol and API standard for middleware that is often used for data transmission in real-time systems that are operating in a dispersed context. Architecturally, DDS is built on the publish-subscribe design pattern and operates on a UDP-based protocol. The top industries where DDS IoT Data Protocols are best applied to assure quick, effective, and reliable data exchange are defense, aerospace, industrial internet of things, healthcare, and automotive. Low-latency data communication, utmost dependability, and a scalable architecture are the main advantages of adopting a data distribution service.


It is a new wireless IoT protocol created for devices used in home automation. Z-Wave is a low-power RF communications technology that can control up to 232 devices at once and builds a wireless mesh network by delivering signals in the sub-1GHz frequency. The main areas of use for Z-wave technology are home automation products like sensors and lamp controls. Minimal interference, reliable connectivity, high security through encryption, and fewer disconnections will be the main advantages of using this IoT Data Protocol.


There is a vast ecosystem of protocols for IIoT that is still emerging, and many businesses are using a hybrid deployment strategy. Major changes in the industry’s utilization of certain protocols and technologies as an addition to the current IoT infrastructure have occurred over the last four years. Each protocol has its own advantages, factors to take into account, and certain IIoT applications it could be best suited for.

Author: Sanket Pathak
Business professional in the Industrial Internet of Things (IIoT). Consultative solutions professional with over 13 years of rich experience in B2B solution sales, global business engagements, new business strategies, territory management and channel development.

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