Ebyte E90-DTU User manual

Chengdu Ebyte Electronic Technology Co.,Ltd. E90-DTU(433C30E)-V2.0 User Manual
Copyright ©2012–2022，Chengdu Ebyte Electronic Technology Co.,Ltd.
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E90-DTU(433C30E)_V2.0

Chengdu Ebyte Electronic Technology Co.,Ltd. E90-DTU(433C30E)-V2.0 User Manual
Copyright ©2012–2022，Chengdu Ebyte Electronic Technology Co.,Ltd.
2
Content
DISCLAIMER................................................................................................................................................................ 4
1PRODUCT OVERVIEW............................................................................................................................................5
1.1. PRODUCT INTRODUCTION............................................................................................................................................. 5
1.2. FEATURES......................................................................................................................................................................5
2QUICK START...........................................................................................................................................................6
2.1. HARDWARE PREPARATION BEFORE USE.........................................................................................................................6
2.2. SOFTWARE PREPARATION..............................................................................................................................................7
2.3. HARDWARE CONNECTION............................................................................................................................................. 7
2.4. WIRELESS PARAMETER CONFIGURATION.......................................................................................................................8
2.4.1. Configure "Serial Modem".................................................................................................................................... 8
2.4.2. Configuring "Gateway Modem"............................................................................................................................ 9
2.5. TCP SERVER USAGE.................................................................................................................................................... 11
2.6. TCP CLIENT USAGE.....................................................................................................................................................12
2.7. UDP SERVER USAGE................................................................................................................................................... 13
2.8. UDP CLIENT USAGE....................................................................................................................................................14
3TECHNICAL SPECIFICATIONS........................................................................................................................... 16
3.1. GENERAL SPECIFICATIONS.......................................................................................................................................... 16
3.2. WIRELESS SPECIFICATIONS......................................................................................................................................... 16
3.3. MECHANICAL DIMENSION DRAWING...........................................................................................................................18
3.4. PIN DEFINITION.......................................................................................................................................................... 19
4BASIC FUNCTIONS OF THE PRODUCT............................................................................................................ 20
4.1. DEFAULT PARAMETERS................................................................................................................................................20
4.2. WIRELESS PART...........................................................................................................................................................20
4.2.1. Basic Wireless Parameters.................................................................................................................................. 20
4.2.2. Broadcast monitoring.......................................................................................................................................... 21
4.2.3. Communication key............................................................................................................................................. 21
4.3. ETHERNET PART.......................................................................................................................................................... 21
4.3.1. IP Acquisition...................................................................................................................................................... 21
4.3.2. Device Port..........................................................................................................................................................21
4.3.3. Subnet Mask and Gateway Configuration...........................................................................................................22
4.3.4. Domain Name Resolution (DNS).........................................................................................................................22
4.3.5. Target IP/Domain Name......................................................................................................................................22
4.4. SOCKET FUNCTION................................................................................................................................................... 22
4.4.1. TCP Server.......................................................................................................................................................... 22
4.4.2. TCP Client........................................................................................................................................................... 23
4.4.3. UDP Server..........................................................................................................................................................23
4.4.4. UDP Client.......................................................................................................................................................... 24
4.4.5. HTTP Client.........................................................................................................................................................24
4.4.6. MQTT Client........................................................................................................................................................26
4.5. WEB PAGE CONFIGURATION........................................................................................................................................ 29
4.6. HARDWARE RESET TO FACTORY..................................................................................................................................30
5ADVANCED FUNCTIONS.....................................................................................................................................31
5.1. HEARTBEAT PACKET................................................................................................................................................... 31

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5.2. REGISTRATION PACKAGE............................................................................................................................................ 31
5.3. SHORT CONNECTION................................................................................................................................................... 31
5.4. NETWORK DISCONNECTION AND RECONNECTION...................................................................................................... 32
5.5. RESTART AFTER TIMEOUT........................................................................................................................................... 32
5.6. CACHE CLEANING ..................................................................................................................................................... 32
5.7. REMOTE UPGRADE......................................................................................................................................................32
5.8. MODBUS GATEWAY.....................................................................................................................................................34
5.8.1. Protocol Conversion............................................................................................................................................34
5.8.2. Simple Protocol Conversion................................................................................................................................35
5.8.3. Multi-host mode...................................................................................................................................................35
5.8.4. Storage Gateway................................................................................................................................................. 36
5.8.5. Configurable Gateway.........................................................................................................................................36
5.8.6. Automatic upload.................................................................................................................................................38
6CONFIGURATION MODE..................................................................................................................................... 39
6.1. WEB CONFIGURATION................................................................................................................................................. 39
6.2. HOST COMPUTER CONFIGURATION..............................................................................................................................39
6.3. AT COMMAND CONFIGURATION.................................................................................................................................. 39
7REVISE HISTORY.................................................................................................................................................. 40
8ABOUT US...............................................................................................................................................................41

Chengdu Ebyte Electronic Technology Co.,Ltd. E90-DTU(433C30E)-V2.0 User Manual
Copyright ©2012–2022，Chengdu Ebyte Electronic Technology Co.,Ltd.
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Disclaimer
EBYTE reserves all rights to this document and the information contained herein.
Products, names, logos and designs described herein may in whole or in part be
subject to intellectual property rights. Reproduction, use, modification or
disclosure to third parties of this document or any part thereof without the
express permission of EBYTE is strictly prohibited.
The information contained herein is provided “as is” and EBYTE assumes no
liability for the use of the information. No warranty, either express or implied, is
given, including but not limited, with respect to the accuracy, correctness,
reliability and fitness for a particular purpose of the information. This document
may be revised by EBYTE at any time. For most recent documents, visit
www.ebyte.com.

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1Product Overview
1.1. Product introduction
E90-DTU(433C30E)_V2.0 supports adaptive network rate (up to 100M full-duplex), provides six working modes
of TCP Server, TCP Client, UDP Server, UDP Client, HTTP Client, and MQTT Client. Mode supports six-way
client connection;
It supports a variety of Modbus gateways, which can perform simple interconversion between Modbus TCP data
and Modbus RTU data, record and send the read commands, and actively upload to the server through pre-stored
commands;
Different from traditional digital radios, E90-DTU(433C30E)_V2.0 is specially developed for Modbus application
scenarios. The feature of unlimited package length can replace communication cables and is a worry-free choice for
Modbus wireless upgrades. The radio works in the 433MHz frequency band, and the communication distance can
reach 3km;
1.2. Features
Support high-speed continuous transmission and uninterrupted transmission, no data packetization,
unlimited data packet length, adapt to Modbus protocol;
The industrial-grade design can work in the environment of -40℃～+85℃, and the wide voltage input (DC
8～28V) supports reverse polarity protection;
All aluminum alloy shell, compact size, easy installation, good heat dissipation;
Perfect shielding design, good electromagnetic compatibility, strong anti-interference ability;
RJ45 adaptive 10/100M Ethernet interface;
Support hardware reset to factory settings;
Support multiple working modes (TCPS, TCPC, UDPS, UDPC, HTTPC, MQTTC);
Support three configuration methods: configuration tool, web page and AT command;
Server mode supports up to 6 socket connections;
Support DHCP function;
Support DNS (domain name resolution), and custom domain name resolution server;
Support multiple Modbus gateways (simple protocol conversion, multi-host mode, storage gateway,
configurable gateway, etc.);
Supports quick access to Alibaba Cloud, Baidu Cloud, OneNET, Huawei Cloud, and standard MQTT
servers of version 3.1;
Support HTTP protocol (GET/POST request);
Support timeout restart function and disconnection reconnection, and the number of times can be
customized;
Support short connection function, the short connection interval can be customized;
Supports sending a variety of heartbeat packets and registration packets;

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Support serial port cache cleaning function;
Support access to the external network, local area network, and virtual serial port tools;
Support online upgrade function.
2Quick Start
2.1. Hardware preparation before use
Take the transparent transmission between E90-DTU(433C30E)_V2.0 and E90-DTU(433C30) as an example.
In order to test E90-DTU(433C30E)_V2.0, the following hardware is required:
One PC with network port;
One E90-DTU(433C30E)_V2.0, hereinafter referred to as "gateway radio";
One E90-DTU (433C30) digital radio, hereinafter referred to as "serial radio" (for example, if necessary, buy it
separately);
TX433-JKD-20P 2 antennas (inner thread, inner needle);
Two DC12V-1A power adapters;
One network cable;
One USB to RS-485 serial cable;
PC
E90-DTU(433C30E)_V2.0
E90-DTU(433C30)
cable
DC12V-1A Power Supply*2
USBTo serial port +
several cables
TX433-JKD-20P*2

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2.2. Software Preparation
The product details on the Ebyte official website provide the download of the network debugging assistant
"NetAssist" and the serial port assistant "XCOM", as shown in the following figure. Official website address:
https://www.ebyte.com.
Download the configuration tool corresponding to the product details, use the "Ebyte Network Configuration Tool"
for "Gateway Radio", and use the "RF_Setting_E90.exe" configuration tool for "Serial Radio".
2.3. Hardware connection
Connect the antenna to the E90 radio and connect to the power supply (DC: 8~28V), RS485 connection, network
cable connection:
Connect the antenna
Above: "Gateway
Radio" on
Next: "Serial Radio" is
connected
Connect RS-485 for "Serial
Radio"
Connect the network
cable for the "Gateway
Radio"

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2.4. Wireless parameter configuration
2.4.1. Configure "Serial Modem"
Step 1: Turn on the power and connect the USB to RS-485 serial cable (serial cable A is connected to the radio
485_A, serial cable B is connected to the radio 485_B);
Step 2: Check whether the radio is working in configuration mode, if not in configuration mode, configure the DIP
switch to enter configuration mode according to the figure below;
Step 3: Open the configuration host computer "RF_Setting_E90.exe" and select the corresponding serial port;
Step 4: "Open Serial Port" and click "Read Parameters", then click "Restore Factory Settings";

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Step 5: Set baud rate to 9600, check to 8N1, "continuous transmission" mode, as shown in the picture below, click
"Write Parameter";
2.4.2. Configuring "Gateway Modem"
Step 1: Turn on the power and connect the PC and the "Gateway Radio" with a network cable;
Step 1: Perform factory configuration on the "Gateway Radio", press and hold the Reload button until the indicator
lights are all on;
Step 2: Modify the IPv4 configuration of the PC, use a static IP, and ensure that the "gateway radio" and the PC are
in the same network segment. The factory default IP is 192.168.4.101, so configure the static IP of the PC as
192.168.4.100 as shown in the following figure:

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Step 3: Use "Ebyte Network Configuration Tool" or web page configuration;
Step 4: Configure the wireless parameters as shown in the figure above, the host computer clicks "Save
Configuration" and then clicks "Restart Device", click Submit for the web page configuration, enter the
configuration key: 123456, and wait for the configuration to complete;
【Note】
For browsers that do not support IE kernel, you can use Firefox, GOOGLE, the latest Edge and other browsers;
If the host computer fails to search for the device, first check whether the network cable is connected normally,
and check whether the host computer is turned on for many times in the local area network. If it still cannot be used
normally, you can close the firewall and restart the host computer;
Do not enter the web page in communication mode, otherwise the device will enter the configuration mode, and
you can only exit the configuration mode by submitting data or restarting the device.

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2.5. TCP server usage
Configure the Ethernet parameters of the "gateway radio", the host computer and web page are configured as
follows:
The network assistant (NetAssist) is connected to the "gateway radio" as shown in the figure below (the LINK
indicator of the device is always on after the connection is successful, if it can be connected but the indicator is not
on, the device is in configuration mode, which can be released by restarting the device), XCOM is connected to the
"serial gateway" ":
Data sending and receiving test:

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2.6. TCP client usage
Configure the Ethernet parameters of the "Gateway Radio", the host computer and web page are configured as
follows:
The network assistant (NetAssist) is connected to the "gateway radio" as shown in the figure below (the LINK
indicator of the device is always on after the connection is successful), and the XCOM is connected to the "serial
gateway":
Data sending and receiving test:

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2.7. UDP server usage
Configure the Ethernet parameters of the "Gateway Radio", the host computer and web page are configured as
follows:
After the configuration is completed, the LINK indicator of the device is always on, and the NetAssist is connected
to the "gateway radio" as shown in the figure below:
Data sending and receiving test (in UDP server mode, data must be sent by PC first, then UDP can dynamically
adjust the destination address, and the data sent by serial port can only be received by the UDP of the last
communication):

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2.8. UDP client usage
Configure the Ethernet parameters of the "Gateway Radio", the host computer and web page are configured as
follows:
After the configuration is completed, the LINK indicator of the device is always on, and the NetAssist is connected
to the "gateway radio" as shown in the figure below:

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Data sending and receiving test The data sent by the serial port will only be received by UDP
(192.168.4.100:8887):

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3Technical Specifications
3.1. General Specifications
No.
Program
Specification
1
voltage
8V~28V DC
2
Network port
specifications
Standard RJ45, support 10/100Mbps
3
Network protocol
ARP、ICMP、IPv4、TCP/UDP、MQTT、HTTP
4
Socket model
TCP Server、TCP Client、
UDP Server、UDP Client、
HTTP Client、MQTT Client
5
TCP Server connect
Supports up to 6 TCP connections
6
IP method of
obtaining
Static IP, DHCP
7
DNS
support
8
domain name server
Customizable, default 114.114.114.114
9
User configuration
Web configuration, host computer, AT commands
10
Antenna interface
SMA (external thread inner hole)
11
Size
84mm*82mm*25mm
12
Average weight
123 ± 5g
13
Operating
temperature
-40 ~ +85℃，Industrial grade
14
Storage temperature
-40～+125℃，Industrial grade
15
Working humidity
10% ~ 90%，Relative humidity, non-condensing
3.2. Wireless Specifications
The main parameters
performance
Remark
minimum
Typical value
maximum
value
blocking power
（dBm）
-
-
10
The probability of
burning at close range is
small
Working frequency
（MHz）
425.0
-
450.5
Support ISM frequency
band, 0～255
Default: 80, Channel
Spacing: 100K

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Powe
r
consu
mptio
n
Emission
current （mA）
329mA @
12V
199mA @
24V
Instantaneous power
consumption
receive current
（mA）
15mA @ 12V
10mA @ 24V
Maximum transmit
power （dBm）
29.5
30.0
30.5
High (30dBm), Medium
(27dBm), Low
(24dBm), Very low
(21dBm)
Except for "high", the
other transmit power is
the reference value, the
actual value may be
different, and reducing
the transmit power will
not reduce the power
consumption of the
device, it is
recommended to use the
maximum power
air rate （bps）
0.3k
2.4k
15.6k
Airspeed adaptation in
continuous transmission
mode;
Fixed length mode (1.2,
2.4, 4.8, 9.6, 19.2, 50,
70) Kbps
Packet length
Continuous transmission mode, data is not divided
into packets (baud rate ≤ 57600)
Fixed-length mode
packet is 77 bytes
【Note】
Use multiple groups of digital radio stations to communicate one-to-one at the same time in the same area. It is
recommended that each group of digital radio stations set the channel interval to be more than 2MHz;
The lower the transmit power, the closer the transmission distance, but the working current will not decrease
proportionally. It is recommended to use the maximum transmit power;
The power adjustment function cannot accurately feedback the actual transmit power of "medium", "low" and
"extremely low". The values in the table are for reference only, and other powers can be customized;

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3.3. Mechanical dimension drawing

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3.4. Pin Definition
No.
identification
name
Function Description
1
DC_IN
Power interface, 8 ～28V DC female socket (inner needle
diameter 2.0mm, hole diameter 6.4mm)
2
ETHERNET
Ethernet interface, standard RJ45 interface
3
PWR
Power Indicator
4
LINK
connection established indicator
5
DATA
Data transceiver indicator
6
ANT
SMA antenna interface, male screw female
7
Reload
Reset to factory settings button

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4Basic Functions of the Product
4.1. Default parameters
category
item
value
Wireless parameters
Module address
0
channel
80
transfer mode
continuous transmission
Serial port baud rate,
check
9600bps、8N1
transmit power
High 30dBm）
ciphertext function
disabled
Network parameters
IP method of
obtaining
static
native port
8886
Native IP
192.168.4.101
subnet mask
255.255.255.0
gateway
192.168.4.1
DNS server
114.114.114.114
web access port
80
network working
mode
TCP server
4.2. Wireless part
4.2.1. Basic Wireless Parameters
Channel: The devices that need to communicate should work on the same channel, and the current working
frequency band can be calculated according to the channel value;
Working frequency = lowest frequency band + channel value * channel spacing
Module address: Transparent transmission should ensure that the addresses of the devices that need to be
communicated are the same, and the configuration range is 0 to 65535;
Airspeed: Ensure that the airspeeds of the devices that need to communicate are the same, and only take effect in
"fixed-length transmission", and "continuous transmission" airspeed adaptation does not require user configuration;
Serial port baud rate and serial port check digit: keep the same as the serial port device for communication,
otherwise the communication will fail;
Transmission power: The transmission power can be reduced according to the actual needs, and it is recommended