RS-485 Communication Protocol Overview The typical serial communication standards are RS-232 and RS-485, which define voltage, impedance, etc., but do not specify software protocols. The RS-485 bus standard defines the electrical characteristics of the bus interface, specifically the definitions for two logic states: a positive level between +2V and +6V represents one logic state, while … Read more
The history of medicine is a process of “Shennong tasting hundreds of herbs”. Aside from daily experiments, many groundbreaking advances and discoveries are often accidental. As spring arrives, more friends around me are sneezing and coughing. Most people will buy antibiotics like cephalosporins at the slightest cough or runny nose, but are antibiotics really effective … Read more
[Abstract] The 485 bus is often used in the wiring of common access control systems, but most people do not understand it. Below, the editor will discuss the 485 bus protocol and the related knowledge of the 485 bus transmission distance. 485 Bus Protocol 485 Bus Protocol When the communication distance is required to be… … Read more
Introduction: Vitamin C, also known as ascorbic acid, is a compound similar to glucose. Due to the presence of certain acidic substances in the molecular structure of vitamin C, it is also referred to as an antioxidant component. Vitamin C exhibits strong reducing properties. On one hand, it is easily oxidized to dehydroascorbic acid, which … Read more