Click the blue text to follow us Hello everyone, I am Hello Alpha. Recently, I introduced a small smart home project I completed, which gained a lot of attention from friends. As a blogger who loves to share technology, of course, I have to open source it! Project Overview The project originated from the ElfBoard … Read more
There is no need to worry anymore if an elderly person falls at home or if there is a gas or water leak. On September 16, the digital think tank and leading financial media outlet “21st Century Business Herald” initiated and hosted the “2020 China Listed Companies Value Discovery Tour,” inviting professional institutions and industry … Read more
At this hopeful yet challenging juncture, companies aiming to navigate the technological transformation cycle and remain competitive must adopt a grounded approach, taking one step at a time. By | Shi Ran In a factory in Shangyu, Shaoxing, Zhejiang, workers are assembling LED lights. This is the factory of Meike Lighting, a lighting company where … Read more
In scenarios such as industrial automation, building control, and energy monitoring, RS-485 serial communication is widely used for data transmission between devices due to itslong-distance transmission capability, strong anti-interference ability, and support for multi-node communication. Especially in a master-slave structure, RS-485 is an ideal choice for achieving centralized control and distributed sensing. However, during actual … Read more
★★★EOS-8—IO★★★ Author: Timothy Proofreader: Timothy Introduction: For various conventional interfaces, we have a good awareness of ESD protection. However, for some discrete or DIY circuits, cross-board usage often also requires ESD protection, such as GOIO, acquisition ports, or cross-board SPI, I2C, etc. This section introduces ESD protection for some IO and cross-board communication interfaces. €1.Digital … Read more
RS232 and RS485 have always been common interfaces in low-voltage applications. Many people mention the differences between them, so today let’s explore them together. 1. Physical Structure of the Interfaces 1. RS232 Interface: One of the computer communication interfaces, the RS-232 interface typically appears in the form of 9 pins (DB-9) or 25 pins (DB-25). … Read more
The connection method for the barcode scanner and Mitsubishi Q series PLC using RS-232C communication (without protocol) will be illustrated as an example. 1 Devices Used 2 Connection Method 3 Configuration of Keyence Barcode Reader 4 Configuration of Mitsubishi Electric PLC Q Series 5 Creating and Transmitting Ladder Diagram Program 6 Execution of Ladder Diagram Program and Monitoring of … Read more
At three o’clock that morning, I was dealing with an unexpected online failure with my colleagues, where dozens of service nodes needed urgent configuration updates. Manual operation? Not realistic. Writing a temporary script? Too slow. At that moment, I remembered the Ansible + Python automation framework I had configured earlier. Within three minutes, all node … Read more
Introduction to Ansible Playbook A Playbook is a component of Ansible used for configuration management. While Ansible’s AD-Hoc command functionality is powerful and can accomplish some basic configuration management tasks, AD-Hoc commands cannot support the configuration management of complex environments. In our practical use of Ansible, most of the time is spent writing Playbooks. In … Read more
Copy files from a remote server to a local computer. This can be accomplished using the Ansible fetch module. This is useful when you want to copy certain log files from a remote server to your local machine. By default, a directory named after each host you are connecting to will be created in the … Read more