Dynamic DNS (DDNS) is a service that allows users to automatically update DNS records when their IP address changes. Typically, Internet Service Providers assign dynamic IP addresses to home or small office networks, meaning the IP address changes periodically. If you run a service that needs to be accessed externally (such as a home server … Read more
Introduction Hello everyone! Today, I want to discuss a topic that excites and troubles many factory automation engineers — PLC multi-protocol compatibility technology.Don’t worry, I will explain this seemingly complex function in the simplest terms.Trust me, once you master this technology, your new and old devices can coexist harmoniously like “three generations of old, middle-aged, … Read more
1. Application Layer The application layer is the first layer of the TCP/IP protocol, directly providing services to application processes. (Data unit: message) It supports the World Wide Web with HTTP, email with SMTP, and file transfer with the FTP protocol. 2. Transport Layer Responsible for providing general data transmission services for communication between processes … Read more
1. Star Topology with Switches We know that the most basic function and application of a switch is to centrally connect network devices. All network devices (such as servers, workstations, PCs, laptops, routers, firewalls, network printers, etc.) can be directly connected to the switch’s ports as long as the switch’s ports support the corresponding device … Read more
Some friends have commented on how to distribute and network community switches?This topic has also been discussed in our weak current VIP technical group.In this issue, let’s understand about how to network community networks? Distribution of switches? Analysis of the community switch networking structure 1. The access layer switches use a hundred megabit to the … Read more
HuaweiS300, S500, S2700, S5700, S6700 series switches—Ethernet Link Aggregation Configuration Routers, switches, firewallsDetailed configuration documentation knowledge base has been established and can be queried in thedialog box! ConfigurationLACP mode link aggregation ● (Optional) Configure systemLACP priority ● (Optional) Configure interfaceLACP priority ● (Optional) ConfigureLACP preemption ● (Optional) Configure the timeout for receivingLACP messages ● (Optional) … Read more
Transforming Electricians into Smart Home Experts: A Journey of Success To be honest, when I first heard the term “smart home,” I was completely bewildered. As an electrician with fifteen years of experience, my mind was filled with switches, sockets, and conduits, thinking that such high-tech gadgets were only for the wealthy. It wasn’t until … Read more
HTTP is the cornerstone of the internet, the most important and widely used protocol in browsers, and the communication language between browsers and servers. HTTP/0.9 HTTP/0.9 was proposed in 1991, primarily for academic communication, to transmit HTML hypertext content between networks, hence it is called the Hypertext Transfer Protocol. HTTP/0.9 Request Process The request line … Read more
1. Basic Usage of MQTT 1. Add Dependencies // build.gradle (app) implementation 'org.eclipse.paho:org.eclipse.paho.client.mqttv3:1.2.5' implementation 'org.eclipse.paho:org.eclipse.paho.android.service:1.1.1' 2. Configure Permissions <!– AndroidManifest.xml –> <uses-permission android:name="android.permission.INTERNET" /> <uses-permission android:name="android.permission.WAKE_LOCK" /> <uses-permission android:name="android.permission.FOREGROUND_SERVICE" /> <service android:name="org.eclipse.paho.android.service.MqttService" /> 3. Core Code Example class MqttManager(context: Context) { private val serverUri = "tcp://mqtt.eclipse.org:1883" private val clientId = "android-client-[0m${System.currentTimeMillis()}" private val qos = … Read more
Click on the above “Programmer Interview Circle“, select “Pin or Star“ Grow Together with You～ Next, I want to systematically review the TCP/IP protocol suite. Of course, most of this was learned in college, but as the saying goes, it’s essential to revisit the basics from time to time. The upcoming blogs will all be … Read more