How to Test Your IoT Platform with EMQX and JMeter: A Step‑by‑Step Guide

Introduction

The IoT and edge‑computing industry is growing rapidly, increasing the scale of nodes and the complexity of business logic, which makes validating platform availability and reliability essential.

What Is EMQX?

EMQX is a scalable, open‑source MQTT broker that connects IoT devices. It requires a working node to manage message traffic; users can obtain a Business Source License for up to 10 licenses or use the official EMQX Cloud, or deploy it on their own servers.

JMeter Overview

JMeter, an Apache Foundation open‑source project, simulates concurrent load for performance testing and supports many protocols (TCP, HTTP, HTTPS, etc.) through built‑in features and extensible plugins.

Installing JMeter

JMeter runs on Java. After installing Java (via Adoptium.net or SDKMan on Linux), download and extract JMeter, then run the jmeter (or jmeter.bat on Windows) executable from the bin directory.

$ wget https://dlcdn.apache.org//jmeter/binaries/apache-jmeter-X.Y.tgz
$ tar xvf apache-jmeter*tgz
$ cd apache-jmeter-X.Y/bin
$ ./jmeter

First JMeter Test

Create a simple HTTP test case: add a Thread Group (virtual user group) to the Test Plan, configure the number of threads and loop count, then add an HTTP Request sampler. Use the View Result Tree listener to inspect responses.

Images illustrate the JMeter UI for adding Thread Groups, configuring thread properties, and adding HTTP Request samplers.

Running the Test

Save the test script and click the Start button. When testing public websites, keep the thread count low (under 10) to avoid excessive load.

Testing Your IoT Platform

After completing the basic HTTP test, you can extend the approach to other IoT protocols supported by EMQX. Future articles will cover additional JMeter components for building more complex test scenarios.