Foreword introduction

LoRa modules are known for their long-distance communication capabilities, enabling long-distance communication in vast areas such as cities and villages. However, the LoRa module itself does not have the ability to transmit data to a remote server or monitoring center. In order to achieve long-distance data transmission, the LoRa module needs to be used in combination with other communication devices, and DTU is a common choice.

Content Express here

LoRa Modem refers to the core hardware or chip of LoRa modulation and demodulation, which is responsible for the modulation and demodulation of LoRa signals. The LoRa module is a modular device that integrates LoRa Modem and other necessary circuits and interfaces, which is easier to use and integrate, and provides a higher level of abstraction and functionality. In practical applications, LoRa modules are usually used to simplify the development and deployment of LoRa communication, while LoRa Modem is more common in underlying hardware design and customized application scenarios, so it is most commonly combined with DTU communication devices.

About LoRa Modem

Definition of LoRa Modem

LoRa Modem refers to the LoRa modem, which is a key component in the LoRa communication system. It is used to process data modulation and demodulation operations to realize the communication function of LoRa modulation technology.

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The LoRa modem is responsible for converting the raw data into a signal suitable for transmission at the LoRa physical layer and demodulating the received signal into raw data. It uses LoRa modulation technology, which uses spread spectrum and low-power consumption techniques to achieve long-distance, low-power wireless communication.

LoRa Modem is usually integrated into the LoRa module or LoRa chip. It includes modem algorithms and associated signal-processing circuits for efficient LoRa communication. LoRa Modem can be connected with host devices (such as microcontrollers, computers, etc.) for data transmission and control through communication interfaces.

Main functions of the LoRa Modem include:

Data Modulation: Convert raw data to LoRa modulated signal.

Data demodulation: demodulate the received LoRa signal into the original data.

RF transceiver function: responsible for sending and receiving wireless signals with the LoRa communication frequency band.

Data processing and scheduling: process and schedule transmitted data, including operations such as assembling and parsing data packets.

LoRa Modem plays an important role in the Internet of Things, sensor networks, and other remote communication applications. It enables devices to achieve long-range, low-power communication through .

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About DTU Digital Radio

Definition of DTU digital transmission station

DTU Data Transfer Unit (Data Transfer Unit) is a kind of radio equipment specially used for data transmission, often used in wireless data communication and remote monitoring and control applications. It converts digital data into radio signals and transmits data on the radio frequency band through modulation techniques such as frequency modulation (FM) or amplitude modulation (AM).

DTU digital transmission station usually consists of a transmitter and a receiver. The transmitter converts the digital data into a modulated signal suitable for wireless transmission, which is then sent through an antenna. After the receiver receives the signal, it is demodulated and processed to restore the original digital data. In this way, the wireless transmission of data is realized.

DTU digital radio is widely used in various remote data transmission and monitoring and control scenarios, including but not limited to the following applications:

Main Application Scenario Functions

Remote monitoring: used to transmit remote monitoring data such as environmental monitoring, meteorological data, water quality data, such as remote weather stations, environmental monitoring stations, etc.

Telemetry and remote control: data used to transmit and control remote devices, such as telemetry and remote control systems in smart grids, remote control devices in industrial automation, etc.

Internet of Things application: used to connect and transmit data of Internet of Things devices to realize remote monitoring and data transmission functions in the Internet of Things.

DTU digital radio has stable signal transmission capability and long communication distance, and can adapt to different environments and application requirements. It provides a reliable solution for wireless data transmission and promotes the development and application of long-distance data communication.

3 Types of  Common wireless DTU

Wireless DTU realizes remote data transmission through wireless communication technologies (such as GPRS, 3G, 4G, NB-IoT, LoRa, etc.). It is suitable for scenarios that require data transmission over long distances, such as IoT applications, remote monitoring and control, etc. Wireless DTU is flexible and mobile, suitable for mobile devices and applications with frequent site changes.

4G DTU

4G DTU (4G Data Transfer Unit) is a data transmission device based on 4G network, which is used to realize remote data transmission and monitoring control. It is usually a modular device with the functions of data acquisition, conversion, transmission and reception, and data transmission through the 4G network.

 [Transmission Type]： 4G

[Power]：23~33dBm

[Size]：82*84*24mm

[Interface]：RS485/RS232

[Weight]：142.5±5g

[Introduction]：E840-DTU(4G-02)E is developed for serial port devices and network servers to transmit data to each other through a network.It is a LTE-FDD/WCDMA/GSM wireless communication data transmission modem with diversity receiving function, supporting LTE-FDD, DC-HSDPA, HSPA+, HSDPA, HSUPA, WCDMA, EDGE and GPRS network

Key features and benefits of 4G DTU include:

High-speed data transmission: 4G DTU utilizes the high-speed data transmission capability provided by the 4G network to achieve fast and reliable remote data transmission. Compared with low-speed 2G and 3G networks, 4G networks have higher bandwidth and data transmission rates.

Wide coverage: 4G network has a wide coverage, which can realize long-distance data transmission and communication in cities, villages and remote areas.

Low latency: 4G network has the characteristics of low latency, which can realize real-time data transmission and monitoring control. This is very important for some application scenarios that require high real-time performance, such as smart cities and industrial automation.

Multi-device connection: 4G DTU supports multi-device connection and communication, and can process data from multiple sensors, instruments and meters at the same time to realize centralized management and remote monitoring of data.

Flexible configuration: 4G DTU usually has configurable parameters, such as network settings, data transmission frequency, etc., which can be adjusted and optimized according to specific application requirements.

Security: 4G DTU adopts security mechanisms such as encryption and authentication during data transmission to ensure the security and reliability of data transmission.

4G DTU is widely used in the Internet of Things, remote monitoring and control, smart city, energy management, and other fields. It enables remote data transmission, monitoring, and control between devices, improving efficiency, reducing costs, and promoting digital transformation and the development of Internet of Things technologies.

GPRS DTU

GPRS DTU (General Packet Radio Service Data Transfer Unit) is a data transmission device based on the GPRS network, which is used to realize remote data transmission and monitoring control. GPRS is a 2G mobile communication technology that realizes data transmission through packet switching.

 [Transmission Type]：GPRS

[Power]：30~33dBm

[Size]： 84*82*25mm

[Interface]： RS485/RS232

[Weight]：136±5g

[Introduction]：E840-DTU (GPRS-03) is a product developed for serial port devices and network servers to transmit data through each other through the network. This product uses the standard AT command, which enables transparent transmission between devices and servers. The cloud platform built by Ebyte can realize the free networking mode. The E840-DTU (GPRS-03) is an industrial grade quad-band GSM/GPRS digital radio.

Key features and advantages of GPRS DTU include:

Long-distance data transmission: GPRS DTU can realize long-distance data transmission and communication by using the data transmission function provided by the GPRS network. It is suitable for application scenarios that require data transmission and monitoring in a large range.

Low cost: Compared with other communication technologies, such as 3G and 4G, the GPRS network has a lower cost and is suitable for some application scenarios that do not require a high transmission rate but require long-term stable transmission.

Wide coverage: GPRS network has a wide coverage, which can realize long-distance data transmission and communication in cities, villages, and remote areas.

Energy-saving design: GPRS DTU usually has a low-power design, which can reduce energy consumption and improve the service life of the device when it works for a long time.

Multi-device connection: GPRS DTU supports multi-device connection and communication, and can process data from multiple sensors, instruments, and meters at the same time to realize centralized management and remote monitoring of data.

Flexible configuration: GPRS DTU usually has configurable parameters, such as network settings, data transmission frequency, etc., which can be adjusted and optimized according to specific application requirements.

Security: GPRS DTU adopts security mechanisms such as encryption and authentication during data transmission to ensure the security and reliability of data transmission.

GPRS DTU is often used in remote monitoring, environmental monitoring, smart grid, and other fields. It enables remote data transmission, monitoring, and control between devices, helping to improve work efficiency, reduce costs, and promote the development of Internet of Things technology. However, it should be noted that with the advancement of communication technology, some areas may gradually stop supporting 2G networks, so the relevant network coverage and development needs to be considered when selecting GPRS DTU.

NB DTU

NB DTU (Narrowband Data Transfer Unit) is a data transmission device based on the NB-IoT (Narrowband Internet of Things) network, which is used to realize remote data transmission and monitoring control. NB-IoT is a low-power wide-area network (LPWAN) technology designed for IoT applications, featuring wide coverage, low power consumption, and large capacity.

[Antenna Interface]： SMA-K

[Size]：84*82*25mm

[Interface]：RS232/RS485

[Weight]： 133±5g

[Introduction]：E840-DTU(NB-02) can realize the communication between serial port device and network server via NB network. With simple AT command,  users can easily use this product to achieve bidirectional transparent data transmission from the serial port to the network. The transparent transmission is between UART devices（referring to PC） and net sever (replaced by TCP testing tools).

Key features and benefits of NB DTU include:

Efficient remote data transmission: NB DTU utilizes an NB-IoT network to achieve efficient remote data transmission, and can realize low-power IoT data transmission in a wide range.

Low power consumption and long battery life: NB-IoT technology adopts a low power consumption design, which can extend the battery life of the device, and is suitable for application scenarios that require long-term operation.

Wide coverage: NB-IoT network has the characteristics of wide coverage, which can realize long-distance data transmission and communication in urban, rural and remote areas.

High connection density: NB-IoT network supports simultaneous connection of a large number of devices and can handle large-scale IoT devices.

Security: NB DTU adopts security mechanisms such as encryption and authentication during data transmission to ensure the security and reliability of data transmission.

Flexible configuration: NB DTU usually has configurable parameters, such as network settings, data transmission frequency, etc., which can be adjusted and optimized according to specific application requirements.

Low cost: Compared with other communication technologies, such as 3G and 4G, the NB-IoT network has a lower cost and is suitable for some application scenarios that do not require a high transmission rate but require long-term stable transmission.

NB DTU is widely used in the Internet of Things, remote monitoring, smart city, smart agriculture, and other fields. It enables remote data transmission, monitoring, and control between devices, helping to improve work efficiency, reduce costs, and promote the development of Internet of Things technology.

How the LoRa module works with DTU

LoRa module and DTU (Data Transfer Unit) can be used in combination to realize remote wireless data transmission and monitoring control. Here's a common way:

LoRa module selection: Select the appropriate LoRa module, which should have LoRa modulation and demodulation function, and have an appropriate communication interface (such as UART, SPI, etc.) for connecting with DTU. LoRa modules usually contain radio frequency transceivers, communication interfaces, and related control circuits and software.

Connect LoRa module and DTU: connect LoRa module and DTU. According to the communication interface type of the LoRa module and DTU, select the appropriate physical connection method, such as serial port connection or GPIO pin connection. Make sure to correctly connect the data cable and control cable of the LoRa module to the corresponding interface of the DTU.

Configuration and protocol: According to the specific application requirements, configure the parameters and communication protocols of the LoRa module and DTU. This includes setting parameters such as the operating frequency, modulation mode, and transmit power of the LoRa module, and configuring the communication parameters of the DTU, such as wireless network type, data transmission rate, etc. Make sure the LoRa module and DTU use the same communication protocol and parameters to achieve correct data transmission and analysis.

Data transmission: Send the data to be transmitted to DTU through the LoRa module. In the LoRa module, the data is modulated and sent, and the LoRa module converts the data into a LoRa-modulated signal and transmits it over the air. The DTU receives the LoRa signal and demodulates it to restore the original digital data.

Remote data processing: at the DTU end, process and analyze the received data. Depending on specific application requirements, data decryption, verification, and data formatting may be required. Data processing can be done inside the DTU, or the data can be transmitted to a remote server or monitoring center for further processing and analysis.

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