adolfbasil › 2022年09月
GPRS module data transmission radio E840-DTU
2022年09月28日
Application scheme of E840-DTU (GPRS-01) in environmental protection projects
Foreword: Environmental protection has always been the direction of the country's vigorous rectification. Relevant departments are also continuously promoting the construction of environmental quality monitoring system. The construction and maintenance costs of traditional monitoring methods are high, and it is difficult to popularize in a large area. The HJ212-2017 protocol is a data transmission standard for online pollutant monitoring systems issued by the Science and Technology Standards Department of the Ministry of Ecology and Environment. From the regulatory level, the data transmission standards for the environmental monitoring process are unified. With the continuous development of Internet of Things technology and environmental monitoring business, automatic, intelligent and networked automatic monitoring of environmental quality has become the focus of work for a period of time in the future.
Introduction of HJ212-2017 protocol standard
The HJ212-2017 standard communication protocol adopts the response mode, and the complete command is composed of the requester's initiation and the responder's response. The requester sends a request to the responder, and after the response is received, it sends a request response to the requester, and the handshake is completed. If the requester does not receive a response to the request, it will be processed according to the response timeout.
The data structure of the communication protocol is shown in Figure 1. All communication packets are composed of ASCII code characters (except Chinese characters, which use UTf-8 code)
Figure 1 Communication protocol data structure
product description
E840-DTU (GPRS-03) is a digital radio product launched by Ebyte that supports transparent transmission of cellular network data. This product has complete software functions and covers most conventional application scenarios. Users only need to set a simple Realize two-way data transparent transmission from serial port to network server. It is an industrial-grade four-band GSM/GPRS data transmission radio.
application solution
Program implementation steps:
1. The project operator uses Ebyte E840-DTU (GPRS-03) as the data acquisition instrument, uses the RS485 serial cable to connect with the monitoring instrument, and collects data through the modbus RTU protocol;
2. E840-DTU (GPRS-03) uploads data to cloud service platform through GPRS cellular network;
3. The cloud platform service communicates with the host computer software through the HJ212-2017 protocol standard to realize data monitoring.
Figure 2 System topology diagram
Solution Advantages
E840-DTU (GPRS-03) uses the modbus standard protocol as the physical layer communication link, and connects to the transport layer network. It conforms to the HJ212-2017 protocol standard and supports the application layer protocol standard for business interaction. The unified data transmission and interface standards can realize fast docking detection platform. The system solution can be customized and developed according to the user's project requirements to control the project cost. The wireless transmission solution is directly connected to the base station of telecom operators to quickly upload communication data, saving wiring costs.
Foreword: Environmental protection has always been the direction of the country's vigorous rectification. Relevant departments are also continuously promoting the construction of environmental quality monitoring system. The construction and maintenance costs of traditional monitoring methods are high, and it is difficult to popularize in a large area. The HJ212-2017 protocol is a data transmission standard for online pollutant monitoring systems issued by the Science and Technology Standards Department of the Ministry of Ecology and Environment. From the regulatory level, the data transmission standards for the environmental monitoring process are unified. With the continuous development of Internet of Things technology and environmental monitoring business, automatic, intelligent and networked automatic monitoring of environmental quality has become the focus of work for a period of time in the future.
Introduction of HJ212-2017 protocol standard
The HJ212-2017 standard communication protocol adopts the response mode, and the complete command is composed of the requester's initiation and the responder's response. The requester sends a request to the responder, and after the response is received, it sends a request response to the requester, and the handshake is completed. If the requester does not receive a response to the request, it will be processed according to the response timeout.
The data structure of the communication protocol is shown in Figure 1. All communication packets are composed of ASCII code characters (except Chinese characters, which use UTf-8 code)
Figure 1 Communication protocol data structure
product description
E840-DTU (GPRS-03) is a digital radio product launched by Ebyte that supports transparent transmission of cellular network data. This product has complete software functions and covers most conventional application scenarios. Users only need to set a simple Realize two-way data transparent transmission from serial port to network server. It is an industrial-grade four-band GSM/GPRS data transmission radio.
application solution
Program implementation steps:
1. The project operator uses Ebyte E840-DTU (GPRS-03) as the data acquisition instrument, uses the RS485 serial cable to connect with the monitoring instrument, and collects data through the modbus RTU protocol;
2. E840-DTU (GPRS-03) uploads data to cloud service platform through GPRS cellular network;
3. The cloud platform service communicates with the host computer software through the HJ212-2017 protocol standard to realize data monitoring.
Figure 2 System topology diagram
Solution Advantages
E840-DTU (GPRS-03) uses the modbus standard protocol as the physical layer communication link, and connects to the transport layer network. It conforms to the HJ212-2017 protocol standard and supports the application layer protocol standard for business interaction. The unified data transmission and interface standards can realize fast docking detection platform. The system solution can be customized and developed according to the user's project requirements to control the project cost. The wireless transmission solution is directly connected to the base station of telecom operators to quickly upload communication data, saving wiring costs.
タグ ：Serial server
4G cloud data transmission radio helps industrial field
2022年09月21日
4G cloud data transmission radio helps industrial field equipment to operate normally
1. Industry background
With the current impact of the epidemic in various places, strengthen the scientific prevention and control of the epidemic, realize the joint epidemic prevention and control mechanism, and strive to promote the resumption of work and production. rs485 ethernet adapter
In view of the orderly development of the production work of the enterprise, the equipment debugging, monitoring and normal operation guarantee of many industrial sites have also presented great challenges.
How to efficiently ensure the normal operation of industrial field equipment under the policy of the joint epidemic prevention and control mechanism? Remote debugging is particularly important.
Cloud virtual serial port 1000_01
On-site debugging, there are currently many pain points. The main pain points are:
l Low efficiency
l High cost
l Difficult to maintain
. . .
2. Solutions
Remote debugging
For many pain points of on-site debugging, remote debugging is adopted. It can effectively alleviate many pain points of current on-site debugging.
In terms of cost advantage, engineering advantage, system advantage and benefit advantage, it has been greatly improved. The overall advantages of remote debugging are obvious.
Cloud virtual serial port 1000_06
3. The principle of the scheme
Using 4G cloud data transmission radio, based on 4G network to break the distance limit. The 4G cloud data transmission station is connected to the equipment on the industrial site through serial communication (RS485/RS232). The data of the equipment debugging on the industrial site is received through the 4G cloud data transmission station, and then the data is automatically transmitted by the 4G cloud data transmission station through the 4G network. to the cloud.
Cloud virtual serial port 1000_03
The remote management center debugging computer is connected to the cloud online through the cloud virtual serial port software to realize the data exchange between the management center and the 4G cloud digital radio station of the remote industrial site, so as to meet the function of remote debugging of industrial field equipment.
Fourth, the program advantages
Application advantages of cloud virtual serial port:
Scenario 1 (the computer cannot access the Internet)
If the computer cannot access the Internet, it is necessary to realize remote access to configuration software or serial port software, using more than 2 devices, and the computer connects to the local cloud data transmission radio through RS485/RS232 to communicate with the remote cloud data transmission radio.
Scenario 2 (the computer can access the Internet)
The computer can access the Internet, use the cloud virtual serial port software, and use more than one device. The computer communicates directly with the remote cloud data transmission radio through the cloud virtual serial port.
Cloud virtual serial port 1000_05
5. Related products
Cloud virtual serial port 1000_07
Product model: E95-DTU (4G01-232)
l 4G network
l Rail installation
l Full Netcom coverage
l Multiple hardware protection
l Not limited by distance
l Support broadcast communication
l Support cloud virtual serial port software
l Support concurrent communication
l Support mobile phone scan code setting
l Support point-to-point communication
l RS485/RS232 serial data transparent transmission
l Power-on and ready-to-use, two-way transparent transmission
1. Industry background
With the current impact of the epidemic in various places, strengthen the scientific prevention and control of the epidemic, realize the joint epidemic prevention and control mechanism, and strive to promote the resumption of work and production. rs485 ethernet adapter
In view of the orderly development of the production work of the enterprise, the equipment debugging, monitoring and normal operation guarantee of many industrial sites have also presented great challenges.
How to efficiently ensure the normal operation of industrial field equipment under the policy of the joint epidemic prevention and control mechanism? Remote debugging is particularly important.
Cloud virtual serial port 1000_01
On-site debugging, there are currently many pain points. The main pain points are:
l Low efficiency
l High cost
l Difficult to maintain
. . .
2. Solutions
Remote debugging
For many pain points of on-site debugging, remote debugging is adopted. It can effectively alleviate many pain points of current on-site debugging.
In terms of cost advantage, engineering advantage, system advantage and benefit advantage, it has been greatly improved. The overall advantages of remote debugging are obvious.
Cloud virtual serial port 1000_06
3. The principle of the scheme
Using 4G cloud data transmission radio, based on 4G network to break the distance limit. The 4G cloud data transmission station is connected to the equipment on the industrial site through serial communication (RS485/RS232). The data of the equipment debugging on the industrial site is received through the 4G cloud data transmission station, and then the data is automatically transmitted by the 4G cloud data transmission station through the 4G network. to the cloud.
Cloud virtual serial port 1000_03
The remote management center debugging computer is connected to the cloud online through the cloud virtual serial port software to realize the data exchange between the management center and the 4G cloud digital radio station of the remote industrial site, so as to meet the function of remote debugging of industrial field equipment.
Fourth, the program advantages
Application advantages of cloud virtual serial port:
Scenario 1 (the computer cannot access the Internet)
If the computer cannot access the Internet, it is necessary to realize remote access to configuration software or serial port software, using more than 2 devices, and the computer connects to the local cloud data transmission radio through RS485/RS232 to communicate with the remote cloud data transmission radio.
Scenario 2 (the computer can access the Internet)
The computer can access the Internet, use the cloud virtual serial port software, and use more than one device. The computer communicates directly with the remote cloud data transmission radio through the cloud virtual serial port.
Cloud virtual serial port 1000_05
5. Related products
Cloud virtual serial port 1000_07
Product model: E95-DTU (4G01-232)
l 4G network
l Rail installation
l Full Netcom coverage
l Multiple hardware protection
l Not limited by distance
l Support broadcast communication
l Support cloud virtual serial port software
l Support concurrent communication
l Support mobile phone scan code setting
l Support point-to-point communication
l RS485/RS232 serial data transparent transmission
l Power-on and ready-to-use, two-way transparent transmission
タグ ：rs485
Lights can be seen everywhere in life.
2022年09月14日
Lights can be seen everywhere in life. One of the traditional lights is that each light corresponds to a different switch, such as: chandeliers, wall lamps, floor lamps, table lamps, etc. at home, and the other is a one-button master switch, such as: on the road Street lights, Remote IO module stage lights at concerts, hotel integrated control touchpads, etc. Like this, the wiring structure and the location of the switch have been determined at the beginning of the lighting design and cannot be easily changed. al enterprises are developing towards the field of smart home, among which smart light control is one of the technologies that has attracted much attention. On this basis, smart switches and smart light bulbs have appeared. Compared with traditional lighting control, smart lighting control can save 20% to 30% or even higher. RS485/RS232 IO Common intelligent lighting control systems use Bluetooth modules and ZIGBEE modules. This lighting control system is suitable for small-scale home control, requiring a large number of routes, and due to the 2.4GHz frequency band used, interference is inevitable. Compared with the above, the use of LoRa technology to design a smart light control solution will solve a series of problems such as being susceptible to interference, short communication distance, and poor stability.
