Category: News (page 149)

Industrial IoT Gateway ZHL4921 is a multi-interface wireless gateway developed by Chengdu Zongheng Intelligent Control Technology Co., Ltd. based on QuecOpen. It is also called an industrial IoT gateway. It is developed using an embedded Linux system and has 256MB…

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…

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…

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…

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…

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 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…

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…

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…

what is interrupt 2020-08-17 14:24: 44Zongheng Intelligent Control 3 what is interrupt (1) The invention of interrupts was used to solve macro-parallel needs. Macro means looking at it as a whole, and parallel means that multiple things are completed. (2)…