EBYTE E90-DTU Wireless Data Transmission Gat User Manual

User Manual for EBYTE models including: E90-DTU Wireless Data Transmission Gat, E90-DTU, Wireless Data Transmission Gat, Data Transmission Gat, Transmission Gat

成都亿佰特电子科技有限公司

Chengdu Ebyte Electronic Technology Co., Ltd. E90-DTU ...

16 mag 2023 — This manual is only used as a guide. Chengdu. Ebyte Electronic Technology Co., Ltd. makes every effort to provide accurate information in this manual. However, ...

[PDF] Chengdu Ebyte Electronic Technology Co., Ltd. E90-DTU(400SL42 ...

E90-DTU can use standard DB9 interface to connect with equipment through RS232. 4.3 RS485 interface definition. E90-DTU can use A, B, G of RS485 ...

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E90-DTU(400SL42 UserManual EN V1.0 es

Chengdu Ebyte Electronic Technology Co., Ltd.

E90-DTU(400SL42) User Manual

Chengdu Ebyte Electronic Technology Co., Ltd.

E90-DTU(400SL42) User Manual

Contents
Disclaimer and Copyright Notice ...................................................................................................................................1 Chapter 1 Product Introduction ................................................................................................................................... 2
1.1 Product Introduction .........................................................................................................................................2 1.2 Function Features ............................................................................................................................................. 2 Chapter 2 Quick Start .................................................................................................................................................. 3 Chapter 3 Product Size ................................................................................................................................................ 4 3.1 interface and indication .................................................................................................................................... 5 4.1 Power Interface Description .............................................................................................................................6 4.2 RS232 interface definition ............................................................................................................................... 6 4.3 RS485 interface definition ............................................................................................................................... 6 Chapter 5 Technical Indicators ....................................................................................................................................6 5.1 Model Specifications .....................................................................................................................................6 5.2 General Specifications ...................................................................................................................................6 5.3 Frequency range and number of channels ........................................................................................................7 5.4 Transmitting power level ..................................................................................................................................7 5.5 Air Data Rate Grades ........................................................................................................................................7 Air Data Rate Grades ............................................................................................................................................. 7 5.6 Current parameter .............................................................................................................................................8 5.7 TX/RX data package length and subpackage method ..................................................................................... 8 Chapter 6 Function Description ..................................................................................................................................... 8 6.1 Fixed Transmission (Hex) ................................................................................................................................ 8 6.2 Broadcasting Transmission (Hex) .................................................................................................................... 9 6.3 Broadcasting Address ....................................................................................................................................... 9 6.4 Listening Address ............................................................................................................................................. 9 6.5 Detailed explanation of abnormal working status log printing ....................................................................... 9 Chapter 7 Working Mode .......................................................................................................................................... 10 7.1 Normal mode .................................................................................................................................................. 10 7.2 Configuration mode ........................................................................................................................................10 Chatper 8 Register read and write control .................................................................................................................11 8.1 Command format ............................................................................................................................................11 8.2 Register description ........................................................................................................................................ 11 8.3 Factory default parameter ...............................................................................................................................14 Chatper 9 Repeater networking mode .......................................................................................................................14 Chapter 10 Configuration instructions on computer .................................................................................................15 Chapter 11 IAP online firmware upgrade ................................................................................................................. 16 Chatper 12 Related Products ..................................................................................................................................... 18 Chapter 13 Practical application field ....................................................................................................................... 19 Chapter 14 Precautions for use ..................................................................................................................................19 Important statement ...................................................................................................................................................... 20 Revision history ............................................................................................................................................................20 About us ........................................................................................................................................................................20

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E90-DTU(400SL42) User Manual

Disclaimer and Copyright Notice
The information in this document, including the URL address for reference, is subject to change without notice. The document is provided "as is" without any guarantee responsibility, including any guarantee for marketability, suitability for a specific purpose, or non-infringement, and any guarantee for any proposal, specification or sample mentioned elsewhere. This document does not bear any responsibility, including the responsibility for infringement of any patent rights caused by the use of the information in this document. This document does not grant any license for the use of intellectual property rights in estoppel or other ways, whether express or implied.
The test data obtained in the article are all obtained by the Ebyte laboratory, and the actual results may vary slightly.
We hereby declared that all brand names, trademarks and registered trademarks mentioned in this document are the property of their respective owners.
The final interpretation right belongs to Chengdu Ebyte Electronic Technology Co., Ltd.

Notice : Due to product version upgrades or other reasons, the contents of this manual may be changed. Ebyte Electronic Technology Co., Ltd. reserves the right to modify the contents of this manual without any hint or noticet. This manual is only used as a guide. Chengdu Ebyte Electronic Technology Co., Ltd. makes every effort to provide accurate information in this manual. However, we does not guarantee that the contents of the manual are completely free of errors. All statements, information and suggestions in this manual do not constitute any express or implied guarantee.

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; Dustproof and moistureproof; The product is simple and easy to use, with host computer configuration software; Using the latest LoRa technology, the distance is farther than the traditional LoRa data transmitter, and the performance is
more powerful; Military-grade LoRa modulation technology is adopted, with data encryption and adjustable subpacket length; Super large single package, up to 240 bytes; Simple and high-efficiency power supply design, using crimp wire, supporting 12V power supply; Transmitting power up to 15W; 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; All aluminum alloy shell, compact size, easy installation, good heat dissipation; perfect shielding design, good electromagnetic
compatibility, strong anti-interference ability;

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E90-DTU(400SL42) User Manual

Powerful software functions, all parameters can be set by programming: such as power, frequency, air rate, address ID, etc.; Temperature monitoring, antenna abnormality monitoring;

Chapter 2 Quick Start

The equipment must be connected with an external 50 ohm impedance antenna, and the two devices and antennas must be used at least 6 meters apart, otherwise the equipment will be damaged. If the equipment is not damaged according to the above operations, the consequences of equipment damage will be borne! ! !
You need to prepare E90-DTU (400SL42) radio, antenna, 12V/4A power supply, and serial cable.
1. First install the antenna for the digital radio, and then install the power supply. Only the crimping method is supported. At this time, the power light is on, and the abnormal light has no indication;
2. Use USB to RS-232 or USB to RS-485 to connect the computer to the digital radio;
3. Start the two serial port debugging assistants, select the serial port baud rate as 9600bps, and the verification method as 8N1, then the serial port transparent transmission can be realized;

4. If the customer needs to modify the parameters, please short the MOD pin with GND to enter the configuration mode. And then open the E90-DTU SL digital radio configuration software to modify the relevant parameters. After completing the configuration, please put the MOD pin in the air state.

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Chapter 3 Product Size

E90-DTU(400SL42) User Manual

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3.1 interface and indication

E90-DTU(400SL42) User Manual

Pin no. 1
2
3
4 5 6 7 8 9 10 11
12
13

Name GND
VCC
MOD
RS485 G RS485 B RS485 A RS232
ANT UPDATE
PWR TXD
RXD
ERR

Function negative pole of crimping power input positive pole of crimping power input
Mode control
RS485 interface G
RS485 interface B RS485 interface A RS232 interface
SMA-K interface
Power indicator Serial port data sending indicator Serial port data receiving indicator
warning light

Descriptioon
power reference ground
Power input (12V/4A)
Floating: normal mode; Groundedconfiguration mode RS485 interface G is connected to the device GND interface (recommended connection) RS485 interface B is connected to device B interface RS485 interface A is connected to device A interface
Standard RS232 interface External threaded inner hole, length 10mm,
characteristic impedance 50 Hidden buttons, users do not need to care
Red, lights up when power is on
Yellow, blinking when sending data
Yellow, blinking when receiving data
The antenna is not connected or the voltage and temperature are abnormal. After solve the
abnormality of antenna not connected, it needs to be powered on again to work normally.

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E90-DTU(400SL42) User Manual

Chapter 4 Interface definition

4.1 Power Interface Description
The user uses the crimping method to supply power, 12V/4A DC power supply.
4.2 RS232 interface definition
E90-DTU can use standard DB9 interface to connect with equipment through RS232.
4.3 RS485 interface definition
E90-DTU can use A, B, G of RS485 interface to connect with RS485 A, B, G of the device respectively. Note: If the communication is not smooth when the radio is connected to multiple devices,but there is no such phenomenon
when the radio is connected to a single device. Please try to connect a 120 matching resistor in parallel between the 485_A terminal and the 485_B terminal.

Chapter 5 Technical Indicators

5.1 Model Specifications

Model Specifications

Working frequency
Hz

Transmit ting
power W

Reference distance
km

Specifications and Features

Recommended Application Scenarios

LoRa spread

suitable for long-distance and

E90-DTU(400SL42) 433.125M

spectrum

interference-prone environments

Test condition: Sunny weather, open air without obstacles, 12V/4A power supply, 5dBi sucker antenna, the height of the antenna from the ground is 2 meters, and the factory default parameters are used.

5.2 General Specifications

No.

Item

Specification

product size

124*109.1*35.2mm

product weight

425g

Description See installation dimensions for details
Weight tolerance 5g

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E90-DTU(400SL42) User Manual

operating

-40+85

temperature

antenna

impedance

Meet the needs of industrial use Standard 50 characteristic impedance

voltage range

12±1V DC

It is recommended to support instantaneous current 4A

communication 6
interface

RS232/RS485

Standard DB9 hole type/5.08 terminal block

baud rate

factory default 9600

Baud rate range 1200~115200

address code

factory default 0

A total of 65536 address codes can be set

5.3 Frequency range and number of channels

Model E90-DTU(400SL42)

Default Frequency
Hz
433.125M

Frequency Band Range Hz
410.125493.125M

Channel Interval
Hz
1M

Number of Channels 84half duplex

Note: In the same area, multiple sets of digital radios are used for one-to-one communication at the same time. It is recommended that each set of digital radios be set with a channel interval of more than 2MHz.

5.4 Transmitting power level

Model E90-DTU(400SL42)

10/15W Software adjustable, default 15W

5.5 Air Data Rate Grades

Model

Default Air Data Rate

bps

E90-DTU(400SL42)

2.4k

number of grades
8

Air Data Rate Grades
kbps 0.31.22.44.89.619.238.462.5

Note: The higher the air data rate, the faster the transmission rate and the shorter the transmission distance; therefore, if the air rate meets the requirements of use, it is recommended to set air data rate as low as possible.

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E90-DTU(400SL42) User Manual

5.6 Current parameter

Model

Supply voltageV

Emission currentA Waiting currentmA

E90-DTU(400SL42)

12±1

2.5~3.5

Note: It is recommended to reserve more than 50% of the current margin when selecting the power supply, which is conducive to the long-term stable operation of the radio. If it falls below or exceeds the power supply range of the device, it may trigger the internal protection of the device to fail to work. Please ensure the stability of the power supply voltage when using it.

5.7 TX/RX data package length and subpackage method

Model

Cache size

Subpackage method

E90-DTU(400SL42)

1000 bytes

Subpackage 32/64/128/240 bytes can be sent by command setting

Note:

1. If the data received by the radio at a time is greater than the capacity of a single packet, the excess data will be automatically allocated to the second transmission until the transmission is completed;

2. The data received by the radio at a time cannot exceed the buffer capacity.

Chapter 6 Function Description

6.1 Fixed Transmission (Hex)
During fixed-point transmission, the module will recognize the first three bytes of the received serial port data as: Address high + address low + channel, and use it as a wireless transmission target.

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6.2 Broadcasting Transmission (Hex)

E90-DTU(400SL42) User Manual

6.3 Broadcasting Address

For Example: Set the address of module A to 0xFFFF and the channel to 0x04. When module A is used as a transmitter (same mode, transparent transmission mode), all receiving modules under the 0x04
channel can receive data to achieve the purpose of broadcasting.

6.4 Listening Address

For example: Set the address of module A as 0xFFFF, and the channel as 0x04; When module A is the receiver, it can receive the data sent from all modules under channel 0x04, the purpose of listening is
realized.
6.5 Detailed explanation of abnormal working status log printing

1. The ERR indicator will flash according to the specific abnormal working status showed in the table below.

Abnormal working

Threshold for judging abnormal

ERR indicator flashing

status

Undervoltage

Supply voltage<11V

Blink once every 500ms

overvoltage

Supply voltage>13V

Blink once every 1s

overheating

Module temperature >120°C

Blink once every 2s

overvoltage and

Supply voltage >13V and module

always on

overheating

temperature >120°C

Unplugged antenna

Transmitting without Antenna

always on

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E90-DTU(400SL42) User Manual

2. The module will temporarily turn off the RF transmission function when it is in an abnormal working state, and it will restart and start the transmission after returning to the normal working state.

3. When the module is in an abnormal state, it will print a circular log every 500ms (set on/off) to inform the user of the current abnormal working state. The format of the printed log is shown in the following table:

Abnormal working status

print log format

Undervoltage

Under Voltage!!!

overvoltage

Over Voltage!!!

overheating

Over Temperature!!!

overvoltage and overheating

Over Voltage & Over Temperature!!!

Unplugged antenna

WARNING!!!: No antenna

Exception log printing enable bit (bit2 of instruction register 04H) 0: off 1: on, the default is 0 (off)

Chapter 7 Working Mode

E90-DTU has two working modes: the MOD pin is floating, it is in the normal mode, that is, the radio communicates normally; the MOD pin is grounded, it is in the configuration mode.

Modes

Description

normal mode configuration mode

Serial port open, wireless open, transparent transmission (factory default mode)
The user accesses the register through the serial port to control the working status of the radio, and the user can configure the module through the host computer configuration software.

7.1 Normal mode

Type Transmitting
Receiving

Radio works in normal modeMOD pin is floating
Users can input data through the serial port and the module will start wireless transmission. The module wireless receiving function is turned on, and after receiving the wireless data, it will be output
through the serial port.

7.2 Configuration mode

Type Transmitting
Receiving Configuring

Radio works in configuration modeMOD pin is grounded Wireless transmitting off Wireless receiving off
User can access registers to configure module operating parameters

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E90-DTU(400SL42) User Manual

Chatper 8 Register read and write control

8.1 Command format

In configuration mode, the list of supported commands are as follows (only 9600, 8N1 format is supported when setting)

No.

Command format

Description

Command: C0+starting address+length+parameters Response: C1+starting address+length+parameters

E.g 1: Configure Channel to be 0x09

command starting address length parameter

Set register

Send: C0 Return: C1

E.g 2: Meanwhile Configure module address (0x1234), network address (0x00), serial port (9600 8N1) and air data rate (1.2K). Send: C0 00 04 12 34 00 61 Return: C1 00 04 12 34 00 61

Command: C1+starting address+ length Response: C1+starting address+length+parameters

E.g 1Read channel

command starting address length parameter

Read register Send: C1

Returen: C1

E.g 2: Read module address, network address, serial port and air data rate. Send: C1 00 04 Return: C1 00 04 12 34 00 61

Wrong format

Wrong format respond: FF FF FF

8.2 Register description

Read or

No.

Name

write

Description

Remark

00H

Read/W rite

ADDH

ADDH default 0

High byte and low byte in the module address;

Note: When the module address is FFFF, it

01H

Read/W rite

ADDL

ADDL default 0

can be used as the broadcast and listening address, that is: the module will not

perform address filtering.

Network address, used to distinguish the

02H

Read/W rite

NETID

NETID default 0

network. When two or more modules need to communicate with each other, their

network address should be the same.

UART Serial port ratebps

For the two modules communicating with each other, their serial port baud rate can

03H

Read/W rite

REG0

0 0 0 Serial port baud rate 1200 0 0 1 Serial port baud rate 2400

be different, and their serial parity bit can also be different.

0 1 0 Serial port baud rate 4800

When transmitting large packets

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E90-DTU(400SL42) User Manual

Serial port baud rate 9600 continuously, users need to consider the

011

data blocking and possible data loss

default

caused by the same baud rate.

1 0 0 Serial port baud rate 19200 1 0 1 Serial port baud rate 38400 1 1 0 Serial port baud rate 57600

It is generally recommended that both communication parties have the same baud rate.

1 1 1 Serial port baud rate 115200

4 3 Serial parity bit

0 0 8N1default

0 1 8O1

1 0 8E1

1 1 8N1equal to 00

2 1 0 Wireless air data ratebps The communication parties must have the same air data rate.
0 0 0 Air data rate 0.3k

0 0 1 Air data rate 1.2k

The higher the air data rate is, the smaller the delay in response, and the shorter the

0 1 0 Air data rate 2.4kdefault transmission distance is.

0 1 1 Air data rate 4.8k

1 0 0 Air data rate 9.6k

1 0 1 Air data rate 19.2k

1 1 0 Air data rate 38.4k

1 1 1 Air data rate 62.5k 7 6 Sub packet setting 0 0 240 bytesdefault

When the data sent is smaller than the sub packet length, the serial output of the receiving end is an uninterrupted continuous output.

0 1 128 bytes 1 0 64 bytes 1 1 32 bytes

When the data sent is larger than the sub packet length, the serial port in receiving end willsub packet the data and then output them.

RSSI Ambient noise enable

0 Disabledefault

After enabling, the command C0 C1 C2 C3 can be sent in the transmission mode to read the register.

04H

Read/W rite

REG1

1 Enable

Register 0x00: current ambient noise RSSI Register 0X01: RSSI at Last Data Received (Current channel noise is: dBm = -(256 RSSI)); Command format: C0 C1 C2 C3+start address+read length; Return: C1 + address + read length + read valid value; For example: Send: C0 C1 C2 C3 00 01 Return: C1 00 01 RSSI (the address can only start from 00)

4 3 Reserve

Abnormal working status log printing Print logs in different formats according to

enable

different abnormal working statuses. For

0 Disabledefault 1 Enable

details, see Chapter 6.5,Detailed explanation of abnormal working status log printing

1 0 TX power

Power and current are nonlinear, and

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E90-DTU(400SL42) User Manual

00 01 10
11

41.5±0.5dBm default 40dBm

power efficiency is the highest at maximum power.
The current does not decrease in proportion to the decrease in power.

05H

Read/W rite

REG2

Channel controlCH 0-83 represents a total of 84 channels

7 Enable RSSI

0 Disabledefault

Actual Frequency= 410.125Mhz+ CH *1Mhz
After enabled, when the module receives the wireless data, it will follow an RSSI strength byte after output via the serial port TXD

06H
07H 08H 80H~ 86H

1 Enable

Read/W rite

REG3

6 Transmission mode

In Fixed point transmission mode, the

module will recognize the first three bytes

0 Transparent transmission modedefault of the received serial port data as:

Address high + address low + channel,

1 Fixed point transmission mode

and use it as a wireless transmission

5 Repeater function 0 Disable repeater functiondefault
1 Enable repeater function
4 LBT enable 0 Disabledefault

target.
After the repeater function is enabled, if the target address is not the module itself, the module will starting a forwarding.
In order to prevent data return-back, it is recommended to use it in conjunction with the fixed-point transmission mode. That is: the target address is different from the source address. After enabled, wireless data will be monitored before transmission, which can avoid interference to a certain extent, but may cause data delay

1 Enable

3 Reserve 2 1 0 Reserve

Write

CRYPT_ H

High byte of Keydefault 0

The maximum stay time of LBT is 2 seconds, and it will be issued forcibly when it reaches 2 seconds.
Write only, read returns 0
Used for user encryption to avoid interception of wireless data over the air by similar modules.

Write

CRYPT_ L

Low byte of Keydefault 0

Read only

PID Product information: 7bytes

The module will internally use these two bytes as a calculation factor to do a transform encryption processing for the wireless signal over the air..
Product information: 7bytes

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8.3 Factory default parameter

E90-DTU(400SL42) User Manual

Item

Factory default parameter00 00 00 62 00 17 03 00 00

Model No Frequency

Address

E90-DTU (400SL42)

433.125MH z

0x0000

Channel Air data rate Baud rate

0x17

2.4kbps

9600

Parity format
8N1

Power 41.5±0.5dBm

Chatper 9 Repeater networking mode

No.

Repeater mode description

User need to set the repeater function in configuration mode. After setting, switch module to the normal mode. Then the repeater starts working.

In the repeater mode, ADDH/ADDL is no longer used as the module address, it is used as a NETID to pair and

forwarding. If the reperater receive the data from a network, then it will forward the data to the other network.

The network ID of the repeater itself is invalid in this case. (See below examples)

The repeater module cannot transmit and receive data, and cannot perform low-power operation.

Repeater networking rules: 1. Forwarding rules: the repeater can forward data in both directions between two NETIDs. 2. In repeater mode, ADDH\ADDL is no longer used as the module address. It is used as a NETID to pair and forwarding. As shown in the figure Primary repeater "Node 1" NETID is 08. "Node 2" NETID is 33. ADDH\ADDL of Repeater 1 are 0833 respectively. So the data sent by node 1 (08) can be forwarded to node 2 (33) Meanwhile,node 1 and node 2 have the same address, so the data transmitted by node 1 can be received by node 2.

Secondary repeater
ADDH\ADDL of Repeater 2 are 3305 respectively.
Therefore, Repeater 2 can forward the data of Repeater 1 to the network NETID: 05. Thus node 3 and node 4 can receive the data from node . Node 4 outputs data normally, but no ourput from Node3 because Node 3 has a different address from Node 1.

Two-way repeater
As shown in belowThe data sent by Node 1 can be received by Node 2 and Node 4; The data sent by by Node 2 and Node 4 can also be received by Node 1.

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E90-DTU(400SL42) User Manual

Chapter 10 Configuration instructions on computer
The following figure is the display interface of E90-DTU configuration on computer. The user can switch to the configuration mode by grounding the MOD pin, and quickly configure and read parameters on the host computer.

In the configuration on computer, the module address, Channel, network ID, and key are all in decimal. The range of values of each parameter is:
Network address: 065535 Channel083

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E90-DTU(400SL42) User Manual

Network ID0255
Key065535
When user configures the repeater mode using the host computer, one point much be paid attention to: In the configuration software, each parameter is in decimal, so the module address and network ID need to be converted when set it.
For example, in the configure software, if the network ID of Transmitter A is input 02, and the network ID of Receiver B is input 10, then the module address of Repeater R should be set as 522. (The address of Repeater R is 0X020A in hex, and it need to be converted to decimal. )

Chapter 11 IAP online firmware upgrade

IAP is online application programming. This module uses this method to upgrade the firmware online through the serial port. PC instruction upgrade
1. Enter the configuration mode by grounding the MOD pin (note: the baud rate is 9600 in the configuration mode); 2. Open the official website to configure the upper computer "RF_Setting (E22-E9X (SL)) V2.7. exe", and select Serial Port > Open;

3. Click Get to view the module information in the left window of the upper computer;

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4. Click Download mode > Click Open File (select Firmware. bin file)> Click Download;

5. Click OKFirmware upgrade starts

6. Click OKFirmware upgrade completed

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The host computer command upgrade logic: the host computer sends: "AT+IAP", the module replies: "AT+IAP=OK", wait for the module to automatically reset and enter the IAP upgrade mode. The character "C" output by the serial port indicates that the module is waiting to receive the firmware bin file. After the host computer detects the character "C", it starts to automatically send the bin file in packets. After the module is received, it will automatically reset and enter the application program, and the upgrade is complete.

Chatper 12 Related Products

Model No.

Interface type

E90-DTU(230SL22)

RS232 RS485

Frequency Hz

Tx power
W

230M

0.16

E90-DTU(230SL30)
E90-DTU(400SL22) E90-DTU(400SL30) E90-DTU(900SL22) E90-DTU(900SL30) E90-DTU(170L30) E90-DTU(433L30) E90-DTU(433L37) E90-DTU(433C30) E90-DTU(433C33) E90-DTU(433C37) E90-DTU(230N27) E90-DTU(230N33) E90-DTU(230N37)

RS232 RS485
RS232 RS485 RS232 RS485 RS232 RS485 RS232 RS485 RS232 RS485 RS232 RS485 RS232 RS485 RS232 RS485 RS232 RS485 RS232 RS485 RS232 RS485 RS232 RS485 RS232 RS485

230M

433\470M

0.16

433\470M

868\915M

0.16

868\915M

170M

433M

230M

0.5

230M

Tested Distance
km 5
10
5 10 5 10

Functions and Features
LoRa spread spectrum, wireless configuration, networking transmission, suitable for complex environments LoRa spread spectrum, wireless configuration, networking transmission, suitable for complex environments LoRa spread spectrum, wireless configuration, networking transmission, long-distance anti-interference LoRa spread spectrum, wireless configuration, networking transmission, long-distance anti-interference LoRa spread spectrum, wireless configuration, networking transmission, long-distance anti-interference LoRa spread spectrum, wireless configuration, networking transmission, long-distance anti-interference

LoRa spread spectrum, super penetrating diffraction

LoRa spread spectrum,long-distance anti-interference

LoRa spread spectrum,20km extremely long-distance 20
anti-interference High-speed continuous transmission, support ModBus 3 protocol High-speed continuous transmission, support ModBus 4 protocol High-speed continuous transmission, support ModBus 10 protocol, long-distance Low frequency narrowband, suitable for complex 5 environments Low frequency narrowband, suitable for complex 8 environments Low-frequency narrow-band, suitable for complex 15 environments, super strong diffraction

Chapter 13 Practical application field
Ebyte digital radio is suitable for all kinds of point-to-point and point-to-multipoint wireless data transmission systems, such as smart home, Internet of Things transformation, power load monitoring, distribution network automation, hydrology and water regime monitoring, tap water pipe network monitoring, urban street lights Monitoring, air defense alarm control, railway signal monitoring, centralized control of railway water supply, oil and gas supply pipeline network monitoring, GPS positioning system, remote meter reading, electronic crane scale, automatic target reporting, earthquake forecasting, fire prevention and anti-theft, environmental monitoring and other industrial automation system, as shown below:
Chapter 14 Precautions for use
Please keep the warranty card of this device properly. The warranty card contains the factory number (and important technical parameters) of the device, which is of great reference value for users to maintain and add new devices in the future.
During the warranty period, if the radio is damaged due to the quality of the product itself rather than man-made damage or natural disasters such as lightning strikes,free warranty is available; please do not repair by yourself, and contact our company if there is a problem. Ebyte provides first-class after-sales service.
Do not operate this radio near some flammable places (such as coal mines) or explosive dangerous objects (such as detonators for detonation).
Appropriate DC stabilized power supply should be selected, which requires strong anti-high-frequency interference ability, small ripple, and sufficient load capacity; it is best to have over-current, over-voltage protection and lightning protection functions to ensure that the digital transmission station normal work.
Do not use it in a working environment that exceeds the environmental characteristics of the data transmission station, such as high temperature, humidity, low temperature, strong electromagnetic field or dusty environment.

Chengdu Ebyte Electronic Technology Co., Ltd.

E90-DTU(400SL42) User Manual

Don't let the radio continuously transmit at full load, otherwise the transmitter may be burned out. The ground wire of the digital radio should be well connected with the ground wire of the external equipment (such as PC, PLC,
etc.) and the ground wire of the power supply, otherwise it is easy to burn out the communication interface, etc.; do not plug or unplug the serial port while the power is on. When testing the digital radio, it must be connected with a matching antenna or 50 dummy load, otherwise the transmitter will be easily damaged; if the antenna is connected, the distance between the human body and the antenna should be more than 2 meters to avoid injury. Don't touch the antenna while transmitting. Wireless data transmission radio often have different communication distances in different environments, and the communication distance is often affected by temperature, humidity, obstacle density, obstacle volume, and electromagnetic environment; in order to ensure stable communication, it is recommended to reserve 50% of the communication distance margin. If the measured communication distance is not good, it is recommended to analyze and improve the communication distance from the quality of the antenna and the installation method of the antenna. You can also contact support@cdebyte.com for help. When choosing a power supply, in addition to keeping a 50% current margin as recommended, you should also pay attention to its ripple not exceeding 100mV. Wireless communication products need to be connected with an impedance-matched antenna to work normally. Even for a short-term test, antenna should be connected with it. If the product is damaged due to this reason, it will not be covered by the warranty.

Important statement

Ebyte reserves the right of final interpretation and modification of all contents in this manual. Due to the continuous improvement of the hardware and software of the product, this manual may be changed without prior
notice, and the latest version of the manual shall prevail.

Revision history

Version 1.0

Date 2023-05-16

Description Initial version

Issued by Bin

About us
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References

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