Any field device, such as a client terminal or a touch panel, can be turned into an MQTT-enabled, lightweight edge gateway. That is done with Ignition Edge MQTT by Cirrus Link, and the gateway works seamlessly with ignition and other common IIoT platforms.
MQTT (Message Queuing Telemetry Transport) is an ISO standards publish-subscribe-based messaging protocol. It is designed for connections where the network bandwidth is limited or a “small code footprint” is required (connections with remote locations.) Even though HTTP is the most popular protocol, MQTT has gained traction over the last few years. Nevertheless, when it comes to IoT development, HTTP lacks the abilities that MQTT has.
MQTT and Data Transmission
MQTT uses the MQTT protocol to support the Sparkplug data-encoding specification and transmit data to other MQTT broker. MQTT is becoming the leading messaging protocol for the IIoT because, unlike HTTP which is document-centric, while MQTT is data-centric. It is also lightweight and publish-subscribe model, which helps to save battery and is perfect for devices constrained by resources. The ‘publish-subscribe’ model enhance the reliability of the whole system and makes clients’ existence independent from one another.
Access Data from OPC-UA Servers & PLCs
Ignition Edge products come with OPC-UA and up to 500 tags for easy PLC connection. They’re also equipped with Siemens, Modbus, Modbus, and the Allen-Bradley driver suite. There are other drivers too and can install into your solution for an additional cost.
Complexity and Message Size
Unlike HTTP specifications which are much longer, MQTT specification is quite short. There are only a few types relevant for developers – connect, publish, subscribe, unsubscribe, and disconnect. Also, MQTT has the smallest packet message size (2 bytes) and a short message header.
Part of an End-to-End IIoT Solution
Ignition Edge MQTT becomes an integral part of an end-to-end IIoT solution. It can capture data from the field, distribute it via MQTT methodology, and build industrial applications all on one platform.
Speed and Delivery
MQTT throughput is 93 times quicker than HTTP’s, and it ensures high delivery as well. Messages via MQTT can be delivered at most once, at least once, and exactly once. It also provides users with options of Testament and Retained messages and Last Will messages. The retained message means that newly subscribed clients get an immediate status update, while the Last Will and Testament message are used to notify subscribers of an unexpected shutdown of the publisher. The Last Will message means that a client will get a will from the broker about the broken connection.
Designed by the MQTT Experts
Cirrus Link Solutions are the ones who made and support Edge MQTT. CLS is a partner of Inductive Automation with lots of experience in developing top-notch MQTT solutions. With their help, Cirrus Link designed MQTT to be the best choice for transmitting data from the edge of the network.
MQTT is essential when bandwidth usage, low battery, intermittent connectivity, throughput, and response time are on place for future solutions. It is very easy-to-use, extendable, and worthy as well as the best choice when it comes to IIoT Development.