Chapter 1 Product Introduction; Product Introduction; Function Features - Ebyte E90-DTU User Manual

Chapter 1 Product Introduction

1.1

Product Introduction

E90-DTU (400SL42) is a real high-quality industrial-grade wireless data transmission
unit (the unit has won the national appearance design patent ZL202030009845.3),it adopts
LORA spread spectrum technology,with strong anti-interference ability, it allows wireless
communication more stable and reliable.
It has a variety of transmission methods, works in the frequency band 410.125 ～
493.125MHz (default 433.125MHz), and the radio provides a transparent RS232/RS485
interface. LoRa direct-sequence spread spectrum technology brings a longer
communication distance and has the advantage of strong anti-interference ability. The
module has a software FEC forward error correction algorithm, which has high coding efficiency and strong error correction ability. In
the case of sudden interference, it can actively correct the interfered data packet, greatly improving reliability and transmission
distance. In the absence of FEC, such packets can only be dropped. It has the function of data encryption. The data transmitted by the
radio in the air is random through the strict encryption and decryption algorithm,which makes the data interception meaninglessly; It
supports the setting of sub-packet length, and supports different real-time and data packets.
As a communication medium, wireless data transmission radio has a certain scope of application like optical fiber, microwave,
and wire: it provides monitoring real-time and reliable data transmission of signals in private networks under certain special conditions,
with the advantages of low cost, easy installation and maintenance, strong diffraction ability, flexible network structure, and long
coverage. It is suitable for occasions with multiple points but scattered locations, and complex geographical environments. It can be
connected with data terminals such as PLC, RTU, rain gauge, and liquid level gauge.
1.2

Function Features

Environmental field strength dynamic indication, data packet RSSI dynamic indication;

Software and hardware dual watchdog;
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Dustproof and moistureproof;
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The product is simple and easy to use, with host computer configuration software;
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Using the latest LoRa technology, the distance is farther than the traditional LoRa data transmitter, and

more powerful;
Military-grade LoRa modulation technology is adopted, with data encryption and adjustable subpacket length;

Super large single package, up to 240 bytes;
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Simple and high-efficiency power supply design, using crimp wire, supporting 12V power supply;

Transmitting power up to 15W;
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Support LBT function, the radio automatically waits for transmission according to the current environmental noise intensity.

Greatly improve the communication success rate of the module in harsh environments;
Support communication key function to effectively prevent data from being intercepted;

Multi-level relay networking can be realized, the communication distance can be effectively extended, and ultra-long-distance

communication can be realized;
Using temperature compensation circuit, the frequency stability is better than ±1PPM;
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All aluminum alloy shell, compact size, easy installation, good heat dissipation; perfect shielding design, good electromagnetic

compatibility, strong anti-interference ability;
the performance is