MQTT.js is a client library for the MQTT protocol protocol, written in JavaScript for node.js and the browser. It is currently the most widely used MQTT client library in the JavaScript ecosystem.
MQTT is a lightweight IoT messaging protocol based on the publish/subscribe model. It can provide real-time and reliable…
In this blog post, we will introduce some of the improvements of the MQTT broker cluster scalability. We will mostly focus on the database engine that EMQ X uses internally and how we improved it in EMQ X 5.0.
In the actual business applications of enterprises, permission management is often a major focus. Whether permission management is sufficiently detailed and flexible is not only related to the information security of enterprises, but also closely related to the refinement degree and efficiency of enterprise management.
Node.js is a JavaScript runtime built on Chrome’s V8 JavaScript engine. Before the emergence of Node.js, JavaScript was usually used as a client-side programming language, and the programs are written in JavaScript often ran on the user’s browser. The appearance of node.js enables JavaScript to be used for server-side programming.
This article will take MQTTBox as MQTT client test tool to connect to MQTT Cloud Service-EMQ X Cloud. Through this article, you will be able to quickly understand the basic usage of MQTTBox and the basic concepts and usage of the MQTT protocol.
MQTTBox is an MQTT client tool developed…
This article will take MQTT Explorer as MQTT client test tool to connect to MQTT Cloud Service — EMQ X Cloud. Through this article, you will be able to quickly understand the basic usage of MQTT Explorer and the basic concepts and usage of the MQTT protocol.
MQTT Explorer is…
In the last post: Load balancing — MQTT broker clustering part 1, we have introduced MQTT load balancing in general: load balancing can be applied either on transport layer, or application layer. Now it’s time to dive into application layer load balancing, the most interesting part: sticky-session.
This post gives a quick introduction for MQTT message broking, the challenges of clustering, and then load balancing.
Maybe you are not that familiar with MQTT protocol, you probably know HTTP protocol very well. …
An EMQ X troubleshooting case study.
Key words: emqx, shutdown crash, shutdown order, race condition
EMQ X is an open-source MQTT broker built on Erlang/OTP which can serve massive amount of TCP/TLS connections. The underlying library for listening and accepting MQTT connections is called esockd.
Often (especially under heavy load)…
MQTT is a lightweight and flexible IoT message exchange and data transmission protocol, which is dedicated to achieving the balance between flexibility and hardware/network resources for IoT developers.
ESP32 is an upgraded version of ESP8266. In addition to the Wi-Fi module, this module also includes a Bluetooth 4.0 module. The…
