As a C#.NET developer, I have witnessed memory leaks, performance degradation, and even security vulnerabilities caused by improper use of HttpClient. I have made these typical mistakes early in my development career, and after years of practice, I have summarized the following ten common issues and their solutions. 🚨 1. Not Reusing HttpClient Instances (Leading … Read more
1. Connecting ESP32 to the Network Before performing MQTT communication, the ESP32 needs to connect to a WiFi network. Below is the code to connect to WiFi: import network import time def connect_wifi(ssid, password): # Create WiFi client interface wlan = network.WLAN(network.STA_IF) wlan.active(True) # Check if already connected if not wlan.isconnected(): print('Connecting to network…') wlan.connect(ssid, … Read more
1.1What is MQTT MQTT (Message Queuing Telemetry Transport) is a lightweight messaging protocol based on the publish/subscribe model. It is built on top of the TCP/IP protocol and was released by IBM in 1999, with the latest version being v3.1.1. The greatest advantage of MQTT is its ability to provide real-time and reliable messaging services … Read more
Detailed Explanation of MQTT Message Structure and Python Reading Methods Introduction In the field of the Internet of Things (IoT), the MQTT (Message Queuing Telemetry Transport) protocol is favored for its lightweight and efficient nature. This article will provide a detailed analysis of the composition of MQTT messages and introduce how to read MQTT message … Read more
[Image] This concludes the technical sharing regarding MQTT. Future updates on the latest developments related to MQTT will be provided periodically. If there are any aspects of MQTT that have not been thoroughly covered or if you have better suggestions, please feel free to leave a comment. We will normally supplement the content based on … Read more
Scan to FollowLearn Embedded Together, learn and grow together Overview 1.1 What is MQTT MQTT (Message Queuing Telemetry Transport) is a lightweight publish/subscribe messaging protocol, developed by Andy Stanford-Clark of IBM and Arlen Nipper of Arcom in 1999, specifically designed for low bandwidth, high latency, or unstable network environments. 1.2 Features Lightweight: The protocol header … Read more
Software Name: MQTT Explorer & MQTTX Software Language: Simplified Chinese Software Size: 71M System Requirements: Windows 10 or higher, 64-bit operating system. Hardware Requirements: CPU @2+GHz, RAM @4G or higher Download Link: Follow the public account and send the keyword “MQTT” in the chat box In the rapidly evolving era of the Internet of Things … Read more
Click the blue text to follow me â–˛ Learning must seek insights, and industry must value specialization [Image] “Common Protocols in TCP/IP” [Image] 1. Application Layer: Data is generated based on network services —— (Common protocols: HTTP, FTP, SFTP, SMTP, DNS) 2. Transport Layer: Encapsulating PDU into data segments —— (Common protocols: TCP/UDP) Identified by … Read more
Click on the “Positive Motion Assistant” above to stay updated with the latest news! ZMC406 Hardware Introduction The ZMC406 is a high-performance multi-axis EtherCAT bus motion controller launched by Positive Motion. It features communication interfaces such as EtherCAT, Ethernet, RS232, CAN, and USB. The ZMC series motion controllers can be applied in various scenarios requiring … Read more
Previously, we introduced the tactile sensors of humanoid robots. In fact, in addition to tactile sensors, robots require a total of four types of sensors: force sensors, tactile sensors, inertial measurement units, and visual sensors. Today, we will elaborate on these. Force Sensors Force sensors convert mechanical signals into electrical signals and are core to … Read more