Abstract of this article
●What is 4G LTE modem
●The role of 4g lte modem
●Characteristics of 4G LTE Modem
●Application of 4G LTE Modem
●Selection and purchase of 4G LTE modem
●PUSR 4G lte modem selection
●Configuration Considerations for 4G LTE Modem
●How to use 4G LTE modem
1、What is 4G LTE modem
4G LTE modem is an IoT device based on 4G cellular network technology. It is mainly used to transmit data collected by sensors, devices or other Internet of Things (IoT) terminal equipment through 4G cellular networks to cloud platforms or other data centers.
A 4G LTE modem usually includes a SIM card slot for inserting a SIM card for 4G/5G networks to establish a connection with the Internet. It also has data transmission interfaces (such as RS232, RS485 and other serial ports) for connecting various data acquisition devices such as temperature sensors, humidity sensors, pressure sensors, etc. Through these interfaces, the 4G LTE modem can read data from devices and transmit it to remote servers using a 4G network.
4G LTE modem can be widely used in the field of Internet of Things, such as intelligent agriculture, intelligent transportation, intelligent warehousing and smart city. It has the characteristics of high-speed data transmission, stable and reliable network connection and low power consumption. It provides an effective solution for remote monitoring, remote control and data acquisition of IoT devices.
2、The role of 4g lte modem
The main function of 4G LTE modem is to realize data transmission and remote monitoring for IoT devices. As a data terminal unit, 4G LTE modem plays an important role in IoT applications such as data transmission, remote monitoring, data collection and remote control, which promotes the development and application of IoT technology.
The following are its specific functions:
●Data transmission:4G LTE modem transmits the data collected by IoT devices to remote servers or cloud platforms through 4G network. In this way, users can obtain device data in real time and perform data analysis, processing and storage.
●Remote monitoring:4G LTE modem can realize remote monitoring and management of IoT devices. Through remote connection, users can monitor the status of equipment at any time, obtain real-time data, adjust setting parameters and so on. This real-time remote monitoring greatly improves the efficiency of equipment operation and the convenience of troubleshooting.
●Data collection:4G LTE modem can connect with various sensors and devices, and obtain the data collected by them. For example, temperature sensors, humidity sensors, pressure sensors and the like. Transmitting these data through 4G network can realize the collection and monitoring of information such as environment and equipment status.
●Remote control:In addition to data transmission and monitoring, some 4G LTE modems can also implement remote control functions. Users can operate and control IoT devices through remote commands, such as switch control and parameter adjustment. This remote control function makes the management of devices more flexible and convenient.
3、Characteristics of 4G LTE Modem
4G LTE modem has become an important data terminal unit in the application of Internet of Things, with its high-speed and stable operation, complete data protection, strong interface compatibility, wide signal coverage and other characteristics. It promotes the development and application of IoT technology. The 4G LTE modem has the following main features:
3.1High-speed and stable operation
From the perspective of hardware, 4G LTE modem has a durable metal shell that is resistant to high and low temperatures (-35°C to 75°C) and wide voltage (5V-35V); Superior moisture-proof, lightning protection and electromagnetic interference resistance capabilities ensure stable operation of equipment in harsh environments.
From the software perspective, the automatic reset function of 4G LTE modem can ensure that the device automatically returns to normal operation in case of failure; Watchdog protection and multiple detection mechanisms can ensure stable operation during work, prevent downtime, and achieve offline reconnection, data retransmission, stable and reliable transmission without packet loss.
The 4G LTE modem has protective measures in place to ensure stable operation from multiple aspects, ensuring that the device is permanently online and suitable for unattended environments.
3.2Data security guarantee
The 4G LTE modem employs a multi-center transmission mechanism, allowing data to be simultaneously sent to up to five centers; Multi-level data is visually displayed, facilitating synchronous access to data; Encrypting transmission on the basis of private network can fully ensure the security and accuracy of various data. Ensure that data is not stolen or tampered with during transmission. The HTTPS protocol can be used to encrypt data transmission.
3.3Wide signal coverage
The 4G LTE modem supports networks from global operators. Whether you are in a city or remote area, as long as there is cellular network coverage, you can use the 4G LTE modem for remote monitoring and control. It also supports multiple communication protocols and methods (such as TCP/IP, MQTT, etc.).
With an impedance matching circuit design, it has high-gain quality antennas with stronger and more sensitive signal search and reception capabilities; The signal coverage is wide, and the super-strong wall penetration performance ensures data transmission in weak environments for remote network monitoring applications.
3.4High compatibility of interfaces
4G LTE modem supports multiple interface options such as RS232/RS485 (customizable TTL level serial port), compatible with all serial port slave devices; Supporting the serial port AT protocol, it can switch to the AT state during operation for parameter configuration and restart control. And it embeds multiple protocols such as PPP, TCP/IP, UDP/IP, MODBUS-TCP, and MODBUS-RTU, which are compatible with the manufacturer's proprietary protocol. It is suitable for networking applications in most industrial scenarios.
4、Application of 4G LTE Modem
Industrial automation: 4G LTE modem can be used as a remote monitoring and data acquisition terminal for industrial equipment. By connecting sensors and equipment, real-time data is transmitted to the cloud platform or monitoring system for remote monitoring and management of equipment status and production process.
Intelligent Transportation:4G LTE modem can be used for the monitoring and management of traffic facilities such as traffic lights, intelligent parking lots, buses etc. It can transmit traffic data in real time, support traffic flow monitoring, intelligent scheduling and remote control.
Environmental monitoring:4G LTE modem can be used for data acquisition and transmission in meteorological stations, water quality monitoring stations, environmental monitoring equipment, etc. By using 4G LTE modem, real-time monitoring of environmental parameters and remote data analysis can be achieved to support environmental protection and resource management.
Smart Agriculture: 4G LTE modem is widely used in the agricultural sector, including farmland irrigation, greenhouse monitoring and farm management. By connecting soil moisture sensors, temperature sensors and other devices, real-time monitoring and remote control of the growth environment of crops can be achieved.
Logistics management:4G LTE modem can be used for remote monitoring and data management of freight vehicles, warehouses, etc. By transmitting data such as vehicle location, temperature and humidity through 4G LTE modem, real-time tracking and monitoring of the logistics process can be achieved, improving logistics efficiency and safety.
Smart home:4G LTE modem can be used as a data collection and control terminal for smart home systems. By connecting home appliances, security equipment and so on, remote control and monitoring of household devices can be achieved to improve family safety and convenience.
4G LTE modem can also be applied to energy management, health care, smart city and other fields, providing data transmission, remote monitoring and intelligent management functions, promoting the development and application of Internet of Things technology.
5、Selection and purchase of 4G LTE modem
5.1 Function selection
With the guarantee of product quality, it is necessary to see whether the function of 4G LTE modem meets the project application environment. Is the 4G LTE modem used for data transmission or SMS transmission, or is it possible to use both. Some manufacturers'4G LTE modems are unable to transmit SMS messages, and even the packet size for SMS transmission fails to meet most project requirements.
In addition, some projects want to use the network access function in addition to the transparent transmission function. In this environment, you can choose a 4G LTE modem with network port or a wireless transmission terminal device that combines the functions of both a 4G LTE modem and an Industrial Router. You can consider USR-781, a 4G LTE modem with network port. It not only enables transparent data transmission and collection through serial ports but also facilitates networking and data forwarding via routing.
5.2 Selection of Communication Data Volume
The equipment with large and fast communication data is bound to have an advantage. The 4G LTE modem of PUSR can achieve a maximum downlink speed of 100Mbps and an uplink speed of 50Mbps, providing customers with high-speed Internet access and wireless data connectivity. It is suitable for applications that require large data volume transmission, such as serial camera image transmission.
The 4G LTE modem has a lower ping value than the 2G/3G module, and the time for the module to send data packets to receive server responses is shorter. It is suitable for applications that require high response speed, such as remote alarming.
The 4G LTE modem of PUSR has strong compatibility. In addition to supporting FDD LTE/TD-LTE, it is also compatible with 2G/3G and supports TD-SCDMA/WCDMA/ EDGE/GPRS/GSM/CDMA1X/EVDO modes.
5.3 Operator selection
According to the project usage environment, it is also very important to choose a network operator supported by 4G LTE modem. You can't use a mobile version of 4G LTE modem in an environment with only Unicom signals. It would be like trying to embroider with great strength but not being able to make it happen. If you ignore the choice of network standard when purchasing, and find that the signal is not correct in your usage environment, it will waste unnecessary time costs to make another purchase.
5.4 Interface selection
The choice of interface mainly depends on the terminal form, such as whether it is a full-duplex RS232 interface or a half-duplex RS485 interface. The corresponding interface should be easy to access and relatively robust, reducing the risk of poor contact. Of course, the more interfaces there are, the better.
5.5 Brand and quality selection
Brand is a symbol of quality and workmanship, which can also be inferred. Design and workmanship also show the strength of a brand. Seeing the welding placement and products without any design, it is hard to believe that they are qualified products with quality assurance. The failure rate can be imagined.
Some manufacturers offer 4G LTE modems at a very low price, but they merely encapsulate the communication module into the 4G LTE modem without encapsulating the underlying protocol. Customers still need to use the underlying AT instruction set when using them, which is quite inconvenient.
USR-G786（调用产品G786）
USR-G786 is an LTE Cat 4 Modem with low latency, high reliability and high real-time characteristics. The product has a fast transmission rate, with an uplink peak rate of 50Mbps and a downlink peak rate of 150Mbps. USR-G786-G supports the frequency bands of major operators all over the world, USR-G786-EUX in European, and USR-G786-AUX in Australia and Latin America. The product supports TCP/UDP transparent transmission, SMS transparent transmission, HTTP transparent transmission, and mutual conversion between modbus TCP and RTU. The product has rich functions, simple to use, and supports customization. It can realize functions such as MQTT to meet more functional needs of customers.
USR-DR504（调用产品DR504）
USR-DR504-G is a DIN-Rail type LTE Cat 4 Modem, with low latency, high reliability and high real-time characteristics.The product has a fast transmission rate, with an uplink peak rate of 50Mbps and a downlink peak rate of 150Mbps. USR-DR504-G supports the frequency bands of major operators all over the world, USR-DR504-EUX in European, and USR-DR504-AUX in Australia and Latin America. The product supports TCP/UDP transparent transmission, SMS transparent transmission, HTTP transparent transmission, and mutual conversion between modbus TCP and RTU. The product has rich functions, simple to use, and supports customization. It can realize functions such as MQTT to meet more functional needs of customers.
7、Configuration Considerations for 4G LTE Modem
When configuring a 4G LTE modem, it is important to note the following points:
SIM card selection: Ensure that you choose the right operator and package to meet your data communication needs. You can consult the operator to obtain a SIM card that supports 4G LTE modem, and learn about its tariff, traffic volume, network coverage, and other related information.
Network parameter configuration:When configuring the 4G LTE modem, it is necessary to correctly set parameters such as APN (Access Point Name), username and password provided by the operator to ensure that the 4G LTE modem can connect to the network properly. These parameters can be obtained from the operator and set according to the configuration interface or manual of the 4G LTE modem.
IP address and port configuration:According to actual needs, assign a static IP address or configure dynamic IP address acquisition method for the 4G LTE modem. At the same time, if you need to communicate with other devices, you also need to configure corresponding port forwarding or mapping rules.
Configuration of serial port or Ethernet parameters: If you are using a serial port to connect devices, you need to configure the serial port parameters such as baud rate, data bits, stop bits, parity check, and so on. If you use Ethernet to connect devices, you need to configure the Ethernet parameters such as IP address, subnet mask and gateway.
Security settings:To protect the security of data transmission, consider enabling encryption protocols (such as TLS/SSL), setting access permissions and passwords, and restricting illegal access.
Heartbeat setting:By configuring the heartbeat mechanism, it is possible to monitor the connection status between 4G LTE modem and server or platform. You can set the frequency and timeout of heartbeat packets to ensure connection stability.
Logging and remote management: Enabling the logging function can help troubleshoot problems and faults, as well as perform timely maintenance and debugging. If remote management is required, consider configuring the remote access and control functions to facilitate remote configuration and monitoring.
It is necessary to operate according to the specific 4G LTE modem model and configuration interface or tool provided by the manufacturer. During the configuration process, read relevant documentation and user manuals, follow guidelines and best practices provided by vendors. If necessary, you can also consult the manufacturer's technical support or seek professional assistance.
8、How to use 4G LTE modem
The steps to use a 4G LTE modem are usually as follows:
【配视频（暂无） PUSR的modem使用的视频】
8.1Preparatory work:
a. Ensure that the SIM card suitable for 4G LTE modem has been purchased and inserted.
b. Insert the power adapter of 4g lte modem and connect it to the power supply.
8.2Connecting devices:
a. Select the appropriate interface connection method as needed, which can be a serial port (such as RS232, RS485) or an Ethernet port (Ethernet).
b. Connect the 4G LTE modem to the target device using the correct cables and wires, ensuring a reliable physical connection.
8.3Configuration parameters:
a. Open the configuration interface or tool of 4G LTE modem, and access it through Web interface, serial port debugging assistant, etc.
b. Set the network parameters such as APN, user name and password of operator according to the guide provided by manufacturer.
Configure serial port parameters (such as baud rate, data bits, etc.) or Ethernet parameters (such as IP address, subnet mask, etc.), ensuring that the communication parameters match those of the connected device.
8.4Network connection:
After the configuration is completed, start the 4G LTE modem and it will automatically connect to the operator's 4G network.
b. The 4G LTE modem will establish a connection with the remote server or platform to ensure smooth network access.
8.5Data transmission:
a. According to the requirements, 4g lte modem can acquire device data periodically or based on event triggering.
b. 4G LTE modem transmits data to remote servers or platforms through network transmission.
8.6Monitoring and Management:
a. The connection status and working conditions of the 4G LTE modem can be monitored through its log records, status indicator lights, etc.
b. When necessary, the 4G LTE modem can be remotely configured and monitored through the configuration interface or remote management tool.
The specific operation steps may vary depending on the model, and need to be operated according to the specific model.
