Ebyte E810-DTU User manual

Ethernet to RS232/RS485/RS422
E810-DTU

Chengdu Ebyte Electronic Technology Co.,Ltd E810-DTU(1RS1E) User Manual
Copyright ©2012–2019, Chengdu Ebyte Electronic Technology Co.,Ltd
1
Contents
1. Product overview .......................................................................................................................................................2
1.1.Product Introduction ..........................................................................................................................................2
1.2 Product specification..........................................................................................................................................2
2. Product design introduction ........................................................................................................................................3
2.1. Dimensions.......................................................................................................................................................3
2.2. Identity definition .............................................................................................................................................4
2.3. Communication connection diagram .................................................................................................................5
2.3.1 RS232 Communication Connection Method .............................................................................................5
2.3.2 RS285 Communication Connection Method .............................................................................................5
2.3.3 RS422 Communication Connection Method .............................................................................................5
3. Product function introduction .....................................................................................................................................6
3.1. Network basic function .....................................................................................................................................6
3.1.1 IP address introduction .............................................................................................................................6
3.1.2 Subnet mask introduction.........................................................................................................................6
3.1.3 Gateway introduction ...............................................................................................................................6
3.1.4 DNS introduction.....................................................................................................................................6
3.2 Serial port function ............................................................................................................................................7
3.2.1 Serial port parameter introduction.............................................................................................................7
3.2.2 Serial Port Framing Mechanism ...............................................................................................................7
3.3 SOCKET function .............................................................................................................................................7
3.3.1 TCP Client Function.................................................................................................................................7
3.3.2 TCP Server Function................................................................................................................................8
3.3.3 UDP Client function.................................................................................................................................9
3.3.4 UDP Server function ................................................................................................................................9
3.4 Special function...............................................................................................................................................10
3.4.1 Web page configuration..........................................................................................................................10
3.4.2 Heartbeat package function ....................................................................................................................11
3.4.3 Registration package function.................................................................................................................11
3.4.4 Transparent cloud function .....................................................................................................................12
3.4.5 Short connection function.......................................................................................................................13
3.4.6 KeepAlive function ................................................................................................................................13
3.4.7 Timeout restart function .........................................................................................................................13
3.4.8 Clear cache ............................................................................................................................................14
3.4.9 Modbus TCP to RTU function ................................................................................................................14
3.4.10 Link/data transmission and reception indication function ......................................................................14
3.4.11 Restore factory settings ........................................................................................................................15
4. Quick use.................................................................................................................................................................15
4.1 Introduction of upper computer........................................................................................................................15
4.2 Default parameters...........................................................................................................................................16
4.3 SOCKET instructions ......................................................................................................................................17
4.3.1 TCP Client Instructions ..........................................................................................................................18
4.3.2 TCP server instructions ..........................................................................................................................19
4.3.3 UDP client instructions...........................................................................................................................20
4.3.4 UDP Server Instructions.........................................................................................................................21
4.4 WEB introduction............................................................................................................................................23
5. FAQ.........................................................................................................................................................................25
5.1 Communication range is too short ....................................................................................................................25
5.2 Module is easy to damage................................................................................................................................25
5.3 High bit error rate ............................................................................................................................................25
6. Revision history .......................................................................................................................................................26
7. About us...................................................................................................................................................................26

Chengdu Ebyte Electronic Technology Co.,Ltd E810-DTU(1RS1E) User Manual
Copyright ©2012–2019, Chengdu Ebyte Electronic Technology Co.,Ltd
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1. Product overview
1.1.Product Introduction
E810-DTU (1RS1E) is a single serial port server that transfers RS232 & RS485 & RS422 to ethernet. It realizes data transparent
transmission between RJ45 and RS232 or RS485 or RS422.
Equipped with M3 series 32-bit processor, it runs fast and has high efficiency. With adaptive network rate (up to 100M full
duplex), TCP Server, TCP Client, UDP Server, UDP Client four communication mechanisms. It realizes two-way data transparent
transmission between TCP/UDP and serial port. Built-in operating system, multi-task processing is stronger, at the same time with
TCP/IP network protocol stack, more efficient and stable. Support two-way SOCKET working at the same time, WEB web page
configuration.
E810-DTU (1RS1E) is easy to operate. Users can directly configure the parameters through the web page. Easy to achieve data
transmission.
1.2 Product specification
SN
Specifications
Description
1
Supply voltage
8V ~ 36V, more than 36V may burn, 12V or 24V power supply is recommended
2
Working current
74.66mA@12V(RS232) ，73.47mA@12V(RS485) ，73.64mA@12V(RS422)
3
Operation mode
Asynchronous half-duplex or asynchronous full-duplex
3
Interface mode
RS232:DB9 Pass Connector
RS485/RS422:1*4*3.81,screwing way
RJ45:Mesh port
4
Serial port standard
RS232:1200~115200bps ; RS485/RS422:1200~256000 bps; RJ45: 300bps~3Mbps
Transmission medium
Wire/twisted pair or shielding wire
5
Mesh size
RJ45，10/100Mbps
6
Network protocol
IP、 TCP/UDP、 ARP、 ICMP、 IPV4
7
IP Acquisition Method
Static IP、 DHCP
8
DNS
Support
9
User configuration
Web page configuration
10
Simple transparent
transmission
TCP Server 、TCP Client 、 UDP Server 、 UDP Client
11
TCP Server connection
Supporting up to 6 TCP connections
12
Packaging mechanism
0-1460 byte packing length
13
Operating temperature
-40 ~ +85℃
14
Working humidity
10% ~ 90%, relative humidity, no condensation
15
Storage temperature
-40 ~ +125℃
16
Average weight
130±5g
17
Size
80×62×25mm（same as E810-DTU(RS)）

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2. Product design introduction
2.1. Dimensions

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2.2. Identity definition
Pin No.
Pin Name
Pin usage
1
RS232
RS232 data interface (DB9 hole connector)
2
485-A(T+)
RS485 Data Interface A/RS422 Data Sending (A+) Interface (3.81mm Terminal)
3
485-B(T-)
RS485 data interface B/ RS422 data transmission (B -) interface (3.81mm terminal)
4
(R+)
RS422 Data Receiving (A+) (3.81mm Terminal)
5
(R-)
RS422 Data Receiving (B-) Interface (3.81mm Terminal)
6
PWR
power indicator light
7
DATA
Data transceiver indicator
8
LINK
Network Connection Indicator
9
DC-IN
Power socket, default 8 ~ 36V, 12V / 24V is recommended, can not be supplied with power
socket at the same time
10
VCC
Power supply terminal, default 8~36V, recommended 12V/24V, can not be powered at the same
time as the power socket (3.81mm terminal block)
11
GND
Power terminal block ground (3.81mm terminal block)
12
Reload
Restore the factory setting button, long press 5 to 10 seconds valid
13
Ethernet
RJ45 Network Interface

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2.3. Communication connection diagram
2.3.1 RS232 Communication Connection Method
2.3.2 RS485 Communication Connection Method
2.3.3 RS422 Communication Connection Method
Note: When wiring as full-duplex (RS422) or half-duplex (RS485), in order to prevent signal reflection and interference, a matching
resistor (parameter 120 ohm 1/4W) must be connected at the end of the line!

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3. Product function introduction
3.1. Network basic function
3.1.1 IP address introduction
The IP address refers to the Internet Protocol address, which indicates the identity of the module in the LAN. The IP address is
unique in the LAN and therefore cannot be duplicated with other device addresses in the same LAN. The E820-TTL-02 module
supports both static IP and DHCP IP acquisition methods.
Static IP
The static IP is required to be manually set by the user. During the setting process, note that the IP, subnet mask and gateway are
simultaneously written. Static IP is suitable for LAN communication without DHCP Server or fixed IP address.
DHCP
The main function of DHCP is to dynamically obtain IP address, Gateway address and NDS server address information from
gateway host (with DHCP server). By DHCP, users can save the tedious steps of setting IP address manually, and avoid the conflict of
IP address in LAN caused by setting IP address manually.
Note: Usually the computer does not have the DHCP Server function. When the E820-TTL-02 is set to DHCP and is directly
connected to the computer, it will not be able to transmit normally because it has been waiting for the IP address.
3.1.2 Subnet mask introduction
The subnet mask is used to indicate which network the host indicated by the IP address is on. The subnet mask cannot exist
separately. It needs to be used together with the IP address. Its role is to divide an IP into two parts: the network address and the host
address.
Subnet mask is a 32 bit address. For class A address, the default subnet mask is 255.0.0, class B 255.255.0, and class C
255.255.255.0. For example, for our commonly used class C address, the capacity of IP in the subnet is numbers, but because all 0 and
all 1 are special IP addresses in the IP address, the number of IP available in class C subnet mask is 254.
3.1.3 Gateway introduction
Gateway, also known as Inter-Network Connector, realizes the interconnection between two networks. If the device is connected
to a router, then the gateway is the router IP address. The device can access another network (or local area network) connected by the
gateway through the gateway.
3.1.4 DNS introduction
DNS is called Domain Name System. The distribution of domain names and IP addresses on the World Wide Web (www) is a database.
After the device has the correct DNS server, it can interact with the external network (World Wide Web) server through the network
domain name.

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3.2 Serial port function
3.2.1 Serial port parameter introduction
The basic parameters of the serial port include: baud rate, data bit, stop bit, check bit, flow control switch.
Baud rate: The serial communication rate can be set from 300bps to 3Mbps. The baud rate supports the custom baud rate.
Data bits: The length of the data bits, the range is: 7, 8, 9.
Stop bit: The range can be set: 1~2
Check bits: Check bits for data communication, supporting three kinds of check modes: None (none), Odd (odd), Even (even).
Flow control switch: The serial port supports the flow control switch. When the flow control is turned on, the transmission and
transmission of data are controlled by RTS/CTS.
Note: By setting serial port parameters, keeping the same parameters with serial port connection equipment can ensure the normal
communication.
3.2.2 Serial Port Framing Mechanism
Because the data on the network end are transmitted by data frames, it is necessary to send the frame data through the serial port to the
network end, so that the data can be transmitted more efficiently and quickly.
Serial port packing time: The default is 10ms, which can be set, the range is 0~255.
Serial port packing length: The default is 1460 bytes, which can be set. The range is from 0 to 1460.
Note: When the two parameters are not 0, the packing rule is to pack data to satisfy any one of them.
When one parameter is 0, the packing rule is another non-zero value.
When both parameters are 0, the packing rule is the default parameter value.
3.3 SOCKET function
The E810-TTL module can establish two Sockets, namely Socket A1 and Socket B1. Among them, Socket A1 supports all
types of TCP Client, TCP Server, UDP Client, and UDP Server. Socket B1 only supports TCP Client, UDP Client, and UDP Server.
Two Sockets run simultaneously. It can connect to different networks for data transmission at the same time.
3.3.1 TCP Client Function
(1) The TCP Client provides a client connection for the TCP network service. Proactively initiate a connection request to the
server and establish a connection for interaction between serial data and server data. According to the relevant provisions of the TCP
protocol, the TCP Client has the difference of connection and disconnection, thereby ensuring reliable exchange of data. It is
commonly used for data interaction between devices and servers and is the most commonly used method of networked
communication.

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(2) When the E810-TTL attempts to connect to the server in TCP Client mode and the local port is 0, the connection is initiated
with a random port each time.
(3) This mode supports the short connection function.
(4) Under the same LAN, if the E810-TTL is set to static IP, please keep the E810-TTL IP and gateway in the same network
segment, and set the gateway IP correctly, otherwise it will not communicate normally.
3.3.2 TCP Server Function
(1) TCP server is TCP server. In the TCP server mode, e810-ttl listens to the local port, accepts and establishes a connection for
data communication when a connection request is sent. When the e810-ttl serial port receives the data, it will send the data to all client
devices that establish a connection with e810-ttl at the same time.
(2) Usually used for communication with TCP client in LAN. It is suitable for the scenario where there is no server in the LAN
and there are many computers or mobile phones requesting data from the server. Like TCP Client, there are differences between
connection and disconnection to ensure reliable data exchange.
(3) When E810-TTL is used as TCP Server, it can accept up to 6 Client connections (the number of connections can be
customized). The local port number is fixed and cannot be set to 0.
(4) TCP Server can set the maximum number of connections. When the number of connections reaches the maximum, it can
choose to kick out the old connections or prohibit the establishment of new connections according to the configuration instructions.

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3.3.3 UDP Client function
(1) UDP Client is a connectionless transmission protocol that provides a transaction-oriented simple and unreliable information
transmission service. Without the establishment and disconnection of a connection, only the IP and port need to be established to send
data to the other party. It is usually used for data transmission scenarios where the packet loss rate is not required, the data packet is
small and the transmission frequency is fast, and the data is transmitted to the specified IP.
(2) In UDP Client mode, E810-TTL will only communicate with the target port of the target IP. If the data is not from this
channel, the data will not be received by E810-TTL.
(3) In the UDP client mode, the destination address is set to 255.255.255.255, which can achieve the effect of UDP full network
segment broadcast, and can also receive broadcast data. The E810-TTL module supports broadcast in the supported network segment,
such as the broadcast method of .xxx.255.
3.3.4 UDP Server function
(1) UDP Server means that the source IP address is not validated on the basis of ordinary UDP. After receiving a UDP packet,
the target IP is changed to the data source IP and port number. When sending data, the IP and port number is sent to the nearest
communication.
(2) This mode is usually used in data transmission scenarios where multiple network devices need to communicate with
modules and do not want to use TCP because of its fast speed and frequency.
Note: UDP Server cannot send data on its own initiative. Only after receiving data can it send data to IP and ports that have
recently interacted with data.

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3.4 Special function
3.4.1 Web page configuration
The module can be accessed through a browser to configure the web page. When the web page is accessed, the access terminal
and the module are in the same local area network, and after entering the user name and password, the web configuration page is
entered.

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3.4.2 Heartbeat package function
In the network transparent transmission mode, the user can choose to have the E810-TTL send a heartbeat packet. The
heartbeat packet can be sent to the network server or sent to the serial device. It cannot be run at the same time.
The main purpose of sending to the network is to maintain a connection with the server, which only takes effect in the TCP
Client and UDP Client modes.
In an application where the server sends a fixed query command to the device, in order to reduce the communication traffic, the
user may select to send a heartbeat packet (query command) to the serial device to replace the query command sent from the server.
The E810-TTL module supports up to 40 bytes of custom heartbeat packets.
3.4.3 Registration package function
In the network transparent transmission mode, the user can choose to have the module send a registration package to the server.
The registration package is for the server to recognize the data source device or as a password to obtain the server function
authorization. The registration package can be sent when the module establishes a connection with the server, or can be spliced into the
registration package data at the forefront of each data packet as a data packet. The data of the registration package can be a MAC
address or a custom registration data, wherein the custom registration package setting content is up to 40 bytes.
The connection sending registration package is mainly used to connect the servers that need to be registered.
Data carrying registration package: The sending data accesses the registration package at the front end of the data, and is
mainly used for protocol transmission.
The registration mechanism is only applicable to TCP client and UDP client, which is invalid under TCP server and UDP
server.

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3.4.4 Transparent cloud function
The transparent cloud function mainly solves the open platform of data interaction between devices and devices, devices and
host computers, devices and servers. The user can enable the transparent cloud function through instructions, and register and
exchange data according to the related usage methods of the Ebyte cloud platform. For details, please refer to the "Ebyte Cloud
Platform Transparent Transmission Guide".

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3.4.5 Short connection function
TCP short connection is mainly used to save server resources and is generally used in multi-point to one-point scenarios. With
short connections, you can ensure that the existing connections are useful connections and do not require additional controls for
filtering.
The TCP short connection function is applied to the TCP Client mode. After the short connection function is enabled, to send
the message, If there is no data reception in the serial port or network port within the set time, the connection will be automatically
disconnected. The short connection function is turned off by default, and the disconnection time can be set after the function is turned
on. The setting range is 2~255S.
3.4.6 KeepAlive function
Keep-Alive is the mechanism for detecting dead connections in a TCP connection. When the user does not send any data, the
"Keep-Alive" information is periodically sent on the TCP link to maintain the idle link, avoiding dead connections and consuming
unnecessary system resources. This setting is valid under TCP and the user can customize the Keep-Alive switch and other parameters.
Keepalive parameter introduction:
Time: How many seconds after the TCP link does not receive data packet transmission to start the probe packet;
Intv: Time interval between the previous detection message and the next detection message;
Probes: The maximum number of probe failures. When the sniffing fails to this number, the TCP connection will be
disconnected.
3.4.7 Timeout restart function
The timeout restart (no data restart) function is mainly used to ensure long-term stable operation of the E810-TTL. When the
network port or the network does not receive data for a long time, the E810-TTL will restart after the set time is exceeded to avoid
anomalies affecting communications. The time of timeout restart can be set through the webpage. The normal working time of this
function is set to 60~65535S, and the default value is 3600S. 0 is off, when the setting is out of range, it returns to the default value.

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3.4.8 Clear cache
When the TCP connection is not established, the data received by the serial port will be placed in the cache area. The
E810-TTL serial port receive cache is 2kbyte. After the TCP connection is established, the network cache data can be cleared
according to the customer's requirements.
The device has two buffer areas, which are the serial data buffer and the network data buffer. When the SOCKET clear cache
function is enabled, only the cache data of the relevant SOCKET link will be cleared, and the serial cache data will not be cleared.
3.4.9 Modbus TCP to RTU function
The device supports Modbus RTU and Modbus TCP conversion function. After the function is enabled, the device receives the
data and detects whether the data meets the Modbus RTU (Modbus TCP) protocol requirements. After the verification is successful,
the Modbus RTU data is converted to Modbus TCP, and the Modbus TCP data is converted to Modbus RTU data.
3.4.10 Link/data transmission and reception indication function
Link indicates the network connection status of the module. In TCP mode, when the network is not connected, the Link is off,
and when the connection is established, the Link is always on. The Link indicator is always on in UDP mode.
The other is the data transmission indication, which shows the transmission status of the serial port data of the module. When
there is no data transmission on the serial port, the data transmission indicator is off. When there is data transmission on the serial port,
the flashing indicates that the period is 60ms and the indicator is on for 10ms.

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3.4.11 Restore factory settings
There are two ways to restore the factory settings of the module: software and hardware. In the hardware reset factory setting
mode, pull down the factory default Restore pin for 5s to 15s, and then pull it high to restore the factory settings.
4. Quick use
4.1 Introduction of upper computer
1. Search interface：
(1)Function menu area;
(2)Search device class table area.
Note: E810-TTL module supports cross network segment configuration. It is not necessary to set the PC side to be the same as
the module IP address segment during configuration. However, when performing UDP/TCP communication on a LAN, the IP address
segment must be the same, otherwise communication will fail.

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2. Double-click the device to be configured and enter the parameter configuration interface.
(1)Parameter configuration area;
(2)Log display area;
(3)Custom data / command sending area;
(4)Special function operating area.
Note: After configuration of the upper computer, click Save to restart the module.
4.2 Default parameters
IP acquisition type
STATIC
IP address
192.168.4.101
Subnet mask
255.255.255.0
Gateway
192.168.4.1
DNS
61.139.2.69
Standby NDS
192.168.4.1
Serial port parameters
115200,8,NONE,1,NFC
Serial port packing time
10 （ms）
Package length of serial port
1460 （byte）
Socket A1 basic parameters
TCPS,192.168.4.101,8886
Socket A1 Heartbeat package mode
NET
Socket A1 Heartbeat package content
0（s), Turn off heartbeat package function
Socket A1 Registration package mode
heartbeat msg

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Socket A1 Registration package time
Close
Socket A1 Register package content
regist msg
Socket A1 Short connection time
0（s）， Turn off short connection
Socket A1 keepalive parameter
time/inteval/probes = 10（s）/5（s）/30（times）
Socket A1 Clear cache function
OFF，close
Socket B1 basic parameters
TCPC,192.168.4.100,8887
Socket B1 Heartbeat package mode
NET
Socket B1 Heartbeat packet time
0（s）,Turn off the heartbeat package function
Socket B1 Heartbeat package content
heartbeat msg
Socket B1 Registration package mode
close
Socket B1 Registration package content
regist msg
Socket B1 Short connection time
0（s）, Turn off short connection
Socket B1 keepalive parameter
time/inteval/probes = 10（秒）/5（秒）/30（次）
Socket B1 Clear cache function
OFF,close
Cloud transmission switch
OFF, close
Tcp server Maximum allowed connections
6
Intranet discovery port
1901
Intranet discovery password
www.cdebyte.comwww.cdebyte.com
Web page port
80
Web login user name / password
admin/admin
Instruction echo display
OFF, close
Timeout restart time
3600（s）
4.3 SOCKET instructions
Preparation before use:
1. Set the IP address of the PC to be the same as the E810-TTL module and the PC. The subnet mask is the same. For example, the IP
of the PC is 192.168.4.100, and the IP of the module is 192.168.4.101.
PC side configuration:

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Module side configuration:
4.3.1 TCP Client Instructions
1. Open the PC network debugging assistant. Take "savage network debugging assistant" as an example, set the protocol type t o TCP
server, local IP and port to 192.168.4.1008886 respectively.
2. Set the device socket A1 network type to TCPC (TCP client), the destination IP is 192.168.4.100, the local port is 0 (random port),
and the destination port is 8886. Click Save to restart the module.

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3. Open the serial port assistant, select the correct COM port and baud rate, wait for the device to connect to the TCP server, and
conduct the communication test with the "network debugging assistant".
4.3.2 TCP server instructions
1. Set "network debugging assistant" to TCP client, remote host IP to 192.168.4.101, and remote host port number to 8886.
2.Set the device socket A1 network type to TCPS (TCP server) and local port 8886. Click Save to restart the module.