01 The Yocto file system supports QT by default. So how do we run our QT programs on the Yocto file system? In this chapter, we will learn how to develop QT programs in a Yocto file system + Ubuntu environment. Note that the development environment is based on “qtcreator-3.5.1” (Ubuntu 16.04.6), and the library … Read more
Follow,Star Public Account to not miss exciting content Source: Embedded Miscellaneous Although my practical development experience with Linux is still limited, I am aware that there are several methods for inter-process communication: pipes, message queues, shared memory, sockets, etc. In a certain project, MQTT was used as the method for inter-process communication, which felt quite … Read more
Recently, I have been revising the control architecture for the company’s IoT devices (vending machines). The reason for this is that the new partner equipment manufacturer has adopted a completely different communication protocol (MQTT). To ensure compatibility between the old and new devices while minimizing the impact on existing operations, I decided to restructure the … Read more
In the previous article, we discussed reading data from water quality sensors based on Arduino. For details, you can read the historical articles. However, due to the limitations of Arduino, it cannot upload data to the network. Therefore, this article presents a method for configuring a water quality sensor based on ESP8266 for data reporting. … Read more
Author: Zibo Zhou Original: https://www.emqx.com/en/blog/mqtt-session Table of Contents MQTT Persistent Sessions What Data Needs to be Stored for Persistent Sessions? Usage of MQTT Clean Session Session Improvements in MQTT 5.0 Q&A about MQTT Sessions Conclusion MQTT Persistent Sessions Unstable networks and limited hardware resources are two major challenges faced by IoT applications. The connection between … Read more
Author: Free and Open Lake AI What is MQTT Used For? MQTT is a lightweight messaging protocol commonly used for Internet of Things (IoT) devices, designed to be energy-efficient and consume minimal bandwidth. The MQTT protocol operates over TCP/IP and is based on a lossless communication bi-directional publish-subscribe model, ensuring that MQTT messages are delivered … Read more
Description: Last year, the Qt performance on the F469 and F769 was quite laggy. This newly released video is impressive. It showcases the Qt performance on ST’s F7, Renesas’ RH850, and NXP’s i.MX RT1050. The cool video demonstrates the effects, where the RH850 is used for a car dashboard display: Frame: The Renesas RH850 can … Read more
01 IntroductionLearning Linux is not difficult; the challenge lies in not finding the right tutorials and having no one to guide you quickly.After buying the development board, it just sits there collecting dust. Watching videos is hard to continue, and the documentation is hard to understand; it’s too difficult!This article aims to explain the basic … Read more
Abstract: Learning Linux is not difficult; the challenge lies in finding the right tutorials and having someone to guide you quickly. After purchasing a development board, it often ends up gathering dust. Watching videos becomes tedious, and understanding the documentation is too hard, making it quite frustrating! Therefore, today I will explain the basic steps … Read more
unsetunsetIntroductionunsetunset Last week, I encountered a real project failure where Old Zhang’s robotic arm suddenly started dancing, and the PLC data could not be transmitted to the cloud. Today, let’s discuss how to use a $20 ESP32 module to handle both PLC’s RS485 communication and cloud data integration. No need for high-end gateways; follow me … Read more