mqtt.org VS MQTTX

MQTT (optional): If you're aiming for advanced customization, familiarity with MQTT (a lightweight messaging protocol) will be beneficial for communicating between the toy and the server.

The MQTT protocol is widely used in IoT applications because of its simplicity and ability to connect different data sources to applications using a publish/subscribe model. While many MQTT brokers support persistent sessions and can store message history as long as an MQTT client is not available, there may be cases where data needs to be stored for a longer period. In such cases, it is recommended to use a time series database. There are many options available, but if you need to store unstructured data such as images, sensor data, or Protobuf messages, consider using ReductStore. It is a time series database specifically designed for storing large amounts of blob data and optimized for IoT and edge computing.

https://mqtt.org is more popular, but its more complex. You will unlikely write your own mqtt while you can easily write own stomp broker.

I wanted to share my latest package (published on NuGet) implementing the MQTT v5 protocol.

I jumped onto https://mqtt.org/ to try to answer my usual use-case question about non-Kafka messaging, which is: "Do the messages get saved anywhere so you can come back and read them later?" Still not entirely sure about it.

But I did see:

    This is why MQTT has 3 defined quality of service levels: 0 - at most once, 1- at least once, 2 - exactly once

rumqttd is a high performance, embeddable MQTT broker that we wrote in Rust. MQTT is extremely lightweight publish/subscribe messaging transport for the Internet of Things (IoT).

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.