MQTT-Client-Examples VS MQTTX

At this point, we have finished writing all the code, and the full code can be found at GitHub.

require('vendor/autoload.php'); use \PhpMqtt\Client\MqttClient; use \PhpMqtt\Client\ConnectionSettings; $server = 'broker.emqx.io'; $port = 1883; $clientId = rand(5, 15); $username = 'emqx_user'; $password = null; $clean_session = false; $connectionSettings = new ConnectionSettings(); $connectionSettings ->setUsername($username) ->setPassword(null) ->setKeepAliveInterval(60) ->setLastWillTopic('emqx/test/last-will') ->setLastWillMessage('client disconnect') ->setLastWillQualityOfService(1); $mqtt = new MqttClient($server, $port, $clientId); $mqtt->connect($connectionSettings, $clean_session); printf("client connected\n"); $mqtt->subscribe('emqx/test', function ($topic, $message) { printf("Received message on topic [%s]: %s\n", $topic, $message); }, 0); for ($i = 0; $i< 10; $i++) { $payload = array( 'protocol' => 'tcp', 'date' => date('Y-m-d H:i:s'), 'url' => 'https://github.com/emqx/MQTT-Client-Examples' ); $mqtt->publish( // topic 'emqx/test', // payload json_encode($payload), // qos 0, // retain true ); printf("msg $i send\n"); sleep(1); } $mqtt->loop(true);

For the complete code of the project, please see: https://github.com/emqx/MQTT-Client-Examples/tree/master/mqtt-client-Node.js

This section will introduce how to use Neuron to collect data from FINS TCP devices, upload the collected data to EMQX, and view it using MQTTX.

Next, we open MQTTX, create a new connection, copy the JWT output when JWKS Endpoint starts to the Password field, and click Connect in the upper right corner to connect.

Again, we can use MQTTX or any other MQTT client to publish MQTT data to the demo/sensor topic. Those data will be processed by the rule. For example, we publish the following data to the topic with a 30 seconds interval, and the two minutes data is like this:

Among these, the MQTTX open-source project stands out as a fast-growing client tool that offers a modern chat-style interface, full MQTT 5.0 support, and a rich set of features that provides a great user experience. With three versions available - Desktop, Command Line, and Browser - MQTTX can fulfill your MQTT testing requirements in diverse scenarios. Undoubtedly, MQTTX is among the top MQTT client tools of 2023.

Here are a few alternatives: http://mqtt-explorer.com/ https://mqttx.app/

Next, we will demonstrate the use of Clean Session with the open-source cross-platform MQTT 5.0 desktop client tool - MQTT X.

MQTT connections are initiated from the client to the broker. Any application or device running the MQTT client library is an MQTT client. The MQTT Broker handles client connection, disconnection, subscribe (or unsubscribe) requests, and routes messages up on receiving publish requests.

MQTT X is an open-source cross-platform desktop client. It is easy to use and provides comprehensive MQTT 5.0 functionality, feature testing, and runs on macOS, Linux and Windows. It also provides command line and browser versions to meet MQTT testing needs in different scenarios.

In this post, we are not going to dig into the programming SDKs. We will try to demonstrate MQTT retained messages using the open-source cross-platform MQTT 5.0 desktop client - MQTT X.

Use MQTT 5.0 client tool - MQTT X as another client to test message sending & receiving.