In the smart home project application, the bus system has always been praised by smart home integrators for its stability, reliability and scalability. Faced with the growing and changing smart home market , manufacturers and integrators are transforming to find new breakthroughs. In the ever-changing external environment, it is worth noting that there will be new market opportunities for bus smart home products . Smart home bus system basics After more than a decade of development in the domestic market, smart homes have gradually matured through the continuous exploration and research in technology. The main feature of bus technology is that all devices communication and control are based on a bus. It is a fully distributed intelligent control network technology. Its product modules have two-way communication capability, interoperability and interchangeability, and its control components can be programmed. . The more influential bus technologies on the market include RS-485, KNX, CAN, C-Bus, SCS-BUS, LonWorks, Modbus and so on. Bus technology products are more suitable for large-area control such as building intelligence and community intelligence. The advantages are mature technology, stable system, high reliability and wide application. Overview of mainstream bus system features RS-485 bus RS-485 is a very common bus. The RS-485 serial bus standard is widely used when the communication distance is several tens of meters to several kilometers. It uses balanced transmit and differential acceptance and therefore has the ability to reject common mode interference. In addition to the high sensitivity of the bus transceiver, it can detect voltages as low as 200mV, so the transmitted signal can be recovered beyond the kilometer. In general, RS-485 adopts half-duplex working mode in the market, and only one point can be sent at any time. Therefore, the transmitting circuit must be controlled by an enable signal. RS-485 is very convenient for multi-point interconnection and can save many signal lines. Applications RS-485 can be networked to form a distributed system that allows up to 32 drives and 32 receivers to be connected in parallel. System features: From the trajectory of intelligent lighting development, the earliest products generally use the RS485 technology, which is a serial communication standard, because only the physical connection specification of the physical layer is specified, each company defines the communication protocol of the product itself, so RS485 has many products, but they cannot communicate with each other directly. RS485 generally needs a main contact, the communication method adopts the polling mode, and the modules adopt the “hand-in-hand†connection mode. Therefore, there are problems such as low communication speed (generally 9.6Kbps) and limited number of modules. Aluminum Alloy Notebook Stand,Adjustable Aluminium Alloy Notebook Stand,Aluminum Alloy Notebook Stand Universal,Aluminum Laptop Computer Stand Shenzhen ChengRong Technology Co.,Ltd. , https://www.dglaptopstandsupplier.com
