Detailed explanation of Modbus RTU protocol 2020-08-05 17:31: 44Zongheng Intelligent Control 5 MODBUS_RTU communication protocol MODBUS_RTU communication protocol (this agreement adopts master-slave question and answer method) PDM series meters/transmitters: PDM series meters/transmitters adopt a brand-new design, which revolutionizes the concept of traditional electricity meters; it

Introduction to LoRa LoRa communication technology is one of the short-distance communications in the Internet of Things communication technology. The same short-distance communication technologies include Bluetooth, WIFI, Zigbee, etc. LoRa is the abbreviation of Long Range in English. It is a type of Low PowerWide

The development history of communications 2020-08-06 18:10:10Zongheng Intelligent Control 3 The development history of communications (1) The earliest communication: beacon tower, beacon; letter: electronic communication (telegraph, telephone, network signal) (2) The two most important aspects of communication are information representation and analysis methods and information

Exhibition: The 22nd China International Industrial Fair (CIIF2020) Time: September 15-19, 2020 Location: Shanghai National Convention and Exhibition Center (No. 333 Songze Avenue) Booth number: 2.1H-C031 Exhibition details China International Industry Fair (hereinafter referred to as “China Industry Fair”) is organized by the Ministry of

What is serial port parallel, serial port connection 2020-08-10 18:19: 13Zongheng Intelligent Control 4 Parallel and serial interfaces (1) Serial and parallel mainly consider the number of communication lines, which is the amount of information that the sender and receiver can transmit at the same

LoRa features and introduction LoRa is a type of short-distance communication in the Internet of Things. Not all scenarios are suitable for LoRa. So before understanding the applications of LoRa, let’s first talk about some characteristics of LoRa. ◆Transmission distance: up to 2-5 Km in

What is a serial port communication protocol? There are several common ones. 2020-08-11 17:55:30 Zongheng Intelligent Control 5 What is a serial communication protocol? In layman’s terms: it is the protocol transmission method used in serial communication. The explanation in professional terms is: the data

Introduction: ZHC4921 is an industrial-grade 4G RTU that provides 4 channels of DI, 4 channels of DO, 4 channels of AI and 1 channel of RS485 interfaces. It supports local logic processing operations, automatic collection and active reporting, Modbus RTU/TCP adaptation, and automatic calibration thresholds.

What is GPRS? The full name of GPRS DTU is GPRS data transmission unit. Currently, there is no specific name in China, and there is no clear agreement. Some people also call it data transmission terminal, data collection terminal, etc. The function of GPRS DTU

The difference between serial port and parallel port 2020-08-13 14:12: 14Zongheng Intelligent Control 6 serial port The serial port is also called a serial port. Compared with the transmission speed of the parallel port, the transmission speed of the serial port is relatively low. Commonly

What is simplex and full-duplex communication? 2020-08-14 10:30:48 Zongheng Intelligent Control 3 What is simplex and full-duplex communication? Simplex means one direction, and duplex means both parties send and receive at the same time. They can only send and receive in one direction at the

What is DB9 interface 2020-08-14 10:57:29 Zongheng Intelligent Control 1 DB9 interface introduction (1) The DB9 interface is a standardized interface commonly used in the early days of serial communication. (2) Serial communication was the main means for computers to communicate with the outside world