USR IOT USR-TCP232-E2 User manual

Multifunctional serial to Ethernet module user manual http://en.usr.cn
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Multifunctional
Multifunctional
Multifunctional
Multifunctional S
S
S
S erial
erial
erial
erial to
to
to
to E
E
E
E thernet
thernet
thernet
thernet converter
converter
converter
converter
(USR-TCP232- E2 )
(USR-TCP232-ED2)
(USR-TCP232- 410 )
File version: V1. 0.1
Jinan USR IOT Technology Co., Ltd. works on LAN and WAN and wireless for MCU to
Ethernet Solutions, Ethernet, WIFI, GPRS, and Wireless modules, we can supply custom
design for those usage, look ing forward to cooperat e with you.

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Contents
Contents
Contents
Contents
Multifunctional S erial to E thernet converter ..................................................................................... 1
1. Introduction ................................................................................................................................... 4
1.1. Overview ........................................................................................................................... 4
1.2 Features ............................................................................................................................... 4
1.2. Applications ....................................................................................................................... 5
1.3. Order information .............................................................................................................. 5
1.4. Electrical c haracteristics .................................................................................................... 6
2. Module USES ............................................................................................................................... 7
2.1. Hardware connection ......................................................................................................... 7
2.2. Login .................................................................................................................................. 8
2.3. Default parameter test ...................................................................................................... 10
3. Work mode .................................................................................................................................. 11
3.1. UDP mode ........................................................................................................................ 11
3.2. TCP Client mode ............................................................................................................. 12
3.3. UDP Server mode ............................................................................................................ 13
3.4. TCP Server mode ............................................................................................................. 14
3.5. Httpd Client mode ............................................................................................................ 15
3.6. TCP Auto mode ............................................................................................................... 17
3.7. WEB to Serial mode ........................................................................................................ 19
4. Hardware interface ...................................................................................................................... 20
4.1. USR-TCP232-E2 ............................................................................................................. 20
4.1.1. Hardware ............................................................................................................... 20
4.1.2. Power and other pin ............................................................................................... 20
4.1.3. LED status ............................................................................................................. 21
4.1.4. Serial(TTL) interface ............................................................................................. 22
4.2. USR-TCP232-ED2 .......................................................................................................... 22
4.2.1. Hardware ............................................................................................................... 22
4.2.2. Power ..................................................................................................................... 23
4.2.3. LED status ............................................................................................................. 23
4.2.4. Serial(TTL) interface ............................................................................................. 23
4.3. USR-TCP232-410 ............................................................................................................ 25
4.3.1. Hardware ............................................................................................................... 25
4.3.2. Power ..................................................................................................................... 26
4.3.3. LED status ............................................................................................................. 26
4.3.4. RS232 interface ..................................................................................................... 26
4.3.5. RS485 interface ................................................................................................. 27
4.4. RJ45 interface .................................................................................................................. 27
4.5. Reload .............................................................................................................................. 27

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5. Paramters configuration .............................................................................................................. 28
5.1. Web page ......................................................................................................................... 28
5.2. Serial port ........................................................................................................................ 28
5.3. network command(setup software) .................................................................................. 28
6. Specific functions ........................................................................................................................ 29
6.1. ModbusRTU to ModbusTCP ........................................................................................... 29
6.2. Hardware flow control(RTS/CTS) ................................................................................... 31
6.3. User MAC address ........................................................................................................... 31
6.4. Firmupdate ....................................................................................................................... 32
6.5. Common questions .......................................................................................................... 34
6.5.1. Work across network segment ............................................................................... 34
6.5.2. Ping is OK but can not open web pages ................................................................ 34
6.5.3. After firm update, can not open web page ............................................................. 35
6.5.4. When connection established, server received serval chars .................................. 35
6.5.5. Every serval seconds, module reconnect ............................................................... 35
7. C ontact us .................................................................................................................................... 36
8. Modified history .......................................................................................................................... 37

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1.
1.
1.
1. Introduction
Introduction
Introduction
Introduction
1.1.
1.1.
1.1.
1.1. Overview
Overview
Overview
Overview
The USR-TCP232- E45 product series i s an intelligent plug-and-play
RS232 /RS485/UART to Ethernet adapter that enables any device or machine with a serial
port, to become Ethernet network and Internet enabled , and have network data transmit
ability . It features a powerful built-in device server, so you can access your serial device
from anywhere in the world over internet! The USR-TCP232- E45 is easily configured via
local network, or through the serial port and web pages .
We Provide Network products and the best service to our customers.
• Chips • Modules • Software • Products
1.2
1.2
1.2
1.2 Features
Features
Features
Features
1. New Cortex-M 4 kernel, industrial working temperature range (-40~85 ℃) , elaborate
optimization TCPIP protocol stack, stable and reliable.
2. selectable RS232 /RS485/UART port, Different port can be used together, work
independently, distinguish the connected serial port via port number.
3. Auto-MIDX function, discretionarily connect cross-over or direct network cable,
automatic switching.
4. Support TCP Server, TCP Client, UDP, UDP Server, HTTPD Client ,websocket,
various of ethernet protocols .
5. Support virtual serial port, provide corresponding software.
6. Serial port highest baud rate from 300bps to 102 4 0 00 bps(COM0 only max
256000bps) .
7. wide voltage input, more applications.
8. Support DHCP , automatically access IP, can inquire the facility within network
through the UDP broadcast protocol (using software USR-TCP232-E45 Setup) .
9. Supply the protocol for VIP customers
10. Provide PC TCP/IP SOCKET programming example, VB , C++ , Delphi , Android , IOS.
11. A built-in web page, also parameter setting via web, can customize web pages for
users.
12. Can also set via UDP broadcast , provide the set up protocol.
13. Reload button, a key restore default Settings.
14. RJ45 status indicator light, RJ45 interface built-in isolation transformer, 2 KV
isolation.
15. The global unique MAC address bought from IEEE, the user can define MAC
address (please state when you make order) .

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16. Support upgrade firmware via network.
17. Support visit IP and domain name at the same time
18. Support up to 8 link from client when act as TCP Server, same data will be send to all
client.
19. Can modify http server port from default port 80 for module built-in http server.
20. Support Keepalive, detect a dead link quickly and make sure the connection more
stable.
1.2.
1.2.
1.2.
1.2. Applications
Applications
Applications
Applications
Fire and Security Panels
Vending Machines
Point of Sale Terminals
Remote equipment management
IT management services
Access Control
Industrial Control
Home Automation
Instrumentation
Building Control
Power Management
1.3.
1.3.
1.3.
1.3. Order
Order
Order
Order information
information
information
information
Type
Type
Type
Type Part
Part
Part
Part Numbers
Numbers
Numbers
Numbers Electric
Electric
Electric
Electric interface
interface
interface
interface
Serial to Ethernet Converter USR-TCP232- E2 2 * TTL 232
Serial to Ethernet Converter USR-TCP232- ED2 3 * TTL232
Serial to Ethernet Converter USR-TCP232- 410 1 * RS232 , 1 * RS485
Diagram 1 - 1 Order information
Note:
For webpages: PORT0, PORT1 and PORT2, represent below:
TCP232-E2: PORT0 represent UART0, PORT1 represent UART1, PORT2 not available in
hardware;
TCP232-ED2: PORT0 represent UART0, PORT1 represent UART1, PORT2 represent
UART2;
TCP232-410: PORT0 represent RS232 ，PORT1 represent RS485 ，PORT2 not available;

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1.4.
1.4.
1.4.
1.4. Electrical
Electrical
Electrical
Electrical c
c
c
c haracteristics
haracteristics
haracteristics
haracteristics
All the data is get at tempture 25 ℃, network cable plug in, max data transmittion(10ms, 20
byte, sending data constantly).
Working tempterature range: -40~85 ℃.
Unpowered storage temperature and humidity range: -65~150 ℃, 5~95%RH
Input Voltage
range
Current
cosumption at
3.3V
Current
cosumption at
5V
Current
cosumption at
12V
TCP232-E2 DC3.3 or 5V 120mA(115-12
5)
120mA(115-12
5)
Not available
TCP232-ED2 DC3.3 or 5V 120mA(115-12
5)
120mA(115-12
5)
Not available
TCP232-410 DC5~18V Not available 86.5mA(85-87.
9)
44.3mA(43.7-4
5.1)

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2.
2.
2.
2. Module
Module
Module
Module Test
Test
Test
Test
2.1.
2.1.
2.1.
2.1. Hardware
Hardware
Hardware
Hardware connection
connection
connection
connection
The picture below is a serial device server of TCP232-410 . It have 1 RS232 and 1 RS485,
they can work independently, now we are going to test it's RS232 function.
Diagram 2 - 1 TCP232-410 with case
Power 410 with DC5V adaptor(make sure you can supply at least 200mA current at DC5V)
Connect 410's RJ45 to PC directly with network cable( No need to distinguish cross or direct
connect cable ), or connect the module and PC via switch or router and set the PC's ip address to
192.168.0.201(must be a format of 192.168.0.xxx), netmask 255.255.255.0.
Connect 410 and PC's comm port together, with a standard female-female extend
cable(default cross-over cable).
Here is TCP232-410's default net configuration ,
IP address: 192.168.0.7
Subnet mask: 255.255.255.0
The default gateway: 192.168.0.1

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Diagram 2 - 2 IP Address Selection in module's built-in webpage
2.2.
2.2.
2.2.
2.2. Login
Login
Login
Login
Open a browser, type and Login above IP address http://192.168.0.7 , you will enter module's
setup web pages.
User name and password are both “ admin ” , this can be modified after login into the system.

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Diagram 2 - 3 Login module's web page
After you have login, you can see w ebpage as follow ,
Diagram 2 - 4 page after login
Current config and status: include display of firmware revision, ip address and mac address.
Port0 settings: represent RS232 port config.
Port1 settings: represent RS485 port config.
Port2 settings: not available.
Web to serial: wesocket function which enable you send and receive data between webpage
and comm port 0(Port 0 only).

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Miscellaneous s ettings : used to set key parameters such as module IP and module name , also
include reset and reload button in webpage.
Note:
For webpages: PORT0, PORT1 and PORT2, represent below:
TCP232-E2/ED2: PORT0 represent UART0, PORT1 represent UART1, PORT2 not available;
TCP232-410: PORT0 represent RS232 ，PORT1 represent RS485 ，PORT2 not available;
2.3.
2.3.
2.3.
2.3. Default
Default
Default
Default parameter
parameter
parameter
parameter test
test
test
test
To test briefly in default working mode, on the foundation of the hardware connection, use
the matched software USR-TCP232-Test to make transmit t ing and receiving test. The left side is
serial port, use software default settings, the right side is the network part, set to TCP Client and
server to be IP 192.168.0.7, port 23.
By default, the two COM port to be set as TCP Server mode, port is 23/26.
This illustration shows the 10 ms two-way simultaneous automatically transmit screenshots.
As the allocated memory of the display control is limited, in order to test large amount of data
transceiver, here will suspend the receive display, only statistical data. Below is the effect after
testing for a few hours, and transmit t ing millions of bytes. Stable and reliable, without a byte loss.

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Diagram 2 - 5 default working mode communication
3.
3.
3.
3. Work
Work
Work
Work mode
mode
mode
mode
3.1.
3.1.
3.1.
3.1. UDP
UDP
UDP
UDP mode
mode
mode
mode
When in UDP mode, after power on, module listen on specific port.
MCU
51
51
51
51 ,
,
,
, AVR
AVR
AVR
AVR ,
,
,
, PIC
PIC
PIC
PIC ,
,
,
, ARM
ARM
ARM
ARM
RS 232 Ethernet
1 . PC listen a UDP port
2 . Data transfer With out connection , only data packet
1 . Module listen a UDP port
Module work at UDP mode
Diagram 3 - 1 UDP mode
When received data from this udp port, send it to serial port;otherwise, when data is received
from serial port, send it to ethernet.
The assist software can be download from link below:
http://www.usr.so/Download/121.html
http://www.usr.so/Download/121.html
http://www.usr.so/Download/121.html
http://www.usr.so/Download/121.html

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Diagram 3 - 2 UDP mode communication test
Note:
1) local port and remote port can be different.
2) Max UDP send length(ethernet to serial) is 1472 bytes. If you want to send more than 1472
Bytes, please div it into shorter packet.
3.2.
3.2.
3.2.
3.2. TCP
TCP
TCP
TCP Client
Client
Client
Client mode
mode
mode
mode
Open web pages and config module to
Telent Mode: TCP Client
Remote port number: 23
Telnet Server Addr: 192.168.0.131

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Diagram 3 - 3 TCP Client mode
Use USR-TCP232-Test,
Diagram 3 - 4 TCP Client communication test
3.3.
3.3.
3.3.
3.3. UDP
UDP
UDP
UDP Server
Server
Server
Server mode
mode
mode
mode
Like the socket UDP server in pc API. Many to one data transfer supported, the data
from uart/232/485 part will be transformed to the last UDP packet ’ s address.

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Here show 2 UDP client communicate with server, server send data to the last client
communicates with it.
Diagram 3 - 5 Client 1 <-> server
Diagram 3 - 6 Client 2 <-> server
3.4.
3.4.
3.4.
3.4. TCP
TCP
TCP
TCP Server
Server
Server
Server mode
mode
mode
mode
TCP Server mode have 2 parameters: max link number and link type

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1. max link number: 1 ~ 8;
2. Link type: typical, completely transparent, send data to all client;
extend1, communicate with id, otherwise abandon;
extend2, communicate with id, otherwise send to all client.
For link type extended 1 and extended 2:
When receive data from ethernet, module will send data to serial port with head ‘ I ’
‘ N ’ ,followed by data. ’ I ’ represent incoming data, ‘ N ’ represent client index.
When user MCU want send data to module serial port, start with head ‘ O ’ ‘ N ’ data... ‘ O ’
represent send out, ‘ N ’ represent which client.
When new TCP connection incoming, module will send ‘ C ’ ‘ N ’ ‘ M ’ to serial port, indicating
that there is current link ‘ N ’ accessed, total link number ‘ M ’ .
When link number have exceed maximum, new link requirment will lead to message ‘ F ’ ‘ F ’ .
When disconnect, module will send ‘ D ’ ‘ N ’ ‘ M ’ , represent current link N is delete, left link
M.
Note:
serial data need to be sent in one package to module.
Diagram 3 - 7 web page configuration
3.5.
3.5.
3.5.
3.5. Httpd
Httpd
Httpd
Httpd Client
Client
Client
Client mode
mode
mode
mode
This function is easier used for web page developer. We establish one web server page, add
this:

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[<?php echo $_GET['data']; ?>]
Means we can GET data from HTTP client ’ s request. Open this URL:
www.usr.cn/1.php?data=12345 , the web page is downbelow, we can see that the web server have
got the data(12345),
Diagram 3 - 8 Request www.usr.cn/1.php?
www.usr.cn/1.php?
www.usr.cn/1.php?
www.usr.cn/1.php? and upload data
Then we take another way, set USR-TCP232-E module Work mode HTTPD Client, Target
address www.usr.cn,
www.usr.cn,
www.usr.cn,
www.usr.cn, Target port 80, about the httpd header more detail, you have to check another
document, attached below link http://www.usr.cn/Download/180.html
http://www.usr.cn/Download/180.html
http://www.usr.cn/Download/180.html
http://www.usr.cn/Download/180.html .

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Diagram 3 - 9 config HTTPD Client
Open USR-TCP232-Test, and type in a string such as "12345", then send via comm port to
TCP232-410, and see the response from www.usr.cn
www.usr.cn
www.usr.cn
www.usr.cn .
Diagram 3 - 10 module act as HTTPD Client
In the response, all the data returned, but the http header from server will be returned, too.
the user may need to parse this to get your data.
4.
4.
4.
4. Hardware
Hardware
Hardware
Hardware
About the new PCB libraries file, we can download it from website
http://www.usr.cn/Download/52.html
http://www.usr.cn/Download/52.html
http://www.usr.cn/Download/52.html
http://www.usr.cn/Download/52.html .

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4.1.
4.1.
4.1.
4.1. USR-TCP232-E2
USR-TCP232-E2
USR-TCP232-E2
USR-TCP232-E2
4.1.1.
4.1.1.
4.1.1.
4.1.1. Hardware
Hardware
Hardware
Hardware
Diagram 4 - 1 USR-TCP232-E2
1) Mechanical dimesion : ( L × W × H): 5 5 × 30 × 23 .2 (mm) including RJ45 and connector ；
2) PCB dimension (L × W): 50 .4 × 30.0 (mm) ；
3) 5V 3.3V double power input ，choose 1 input
1) 2 * serial port (2 * TTL, 3.3V)
2) TTL serial port 0 support hardware flow control(RTS/CTS)
4.1.2.
4.1.2.
4.1.2.
4.1.2. Power
Power
Power
Power and
and
and
and other
other
other
other pin
pin
pin
pin
Power supply socket, The input voltage range 3.3V or 5V , average current both 1 2 0 MA. We
default supply customer with high quality 5 V / 1 A power adapter.
if your MCU's signal is 5V, pls add a signal convert between 3.3V and 5V
id name description
1 VDD
DC 5 V(you must choose only one supply between 5V
or 3.3V)
2 VCC
DC3.3V(you must choose only one supply between

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5V or 3.3V)
3 GND
ground
4 RST
Reset pin(give a constant 200ms low level make
module reset)
5 TXD0
Data transmit pin for comm port 0
6 RXD0
Data receive pin for comm port 0
7 Reload
Pin to make module back to factory default
parameters(take this pin to low , then power off and
on, keep this pin down for 2 seconds, then release it)
8 WORK
WORK LED indicate, it will toggle every 1 second
9 CTS0
Clear to send
10 RTS0
Request to send(also muxed as RS485 enable tx pin,
enable it from software in )
1 1 RXD1
Data receive pin for comm port 1
1 2 TXD1
Data transmit pin for comm port 1
4.1.3.
4.1.3.
4.1.3.
4.1.3. LED
LED
LED
LED status
status
status
status
besides Link and Data LED of RJ45, there is one work LED pin interface reserved on board.
ID name
Description
1 Work
Just interface pin, have no LED on module,
If you need it, take this pin with LED and 510 ohm
resistor to GND.
2 Link(green) On RJ45, when ethernet physical link established, on.
3 Data(yellow) On RJ45, wnen ethernet data communicate, twinkle.
Diagram 4 - 2 LED definition
4.1.4.
4.1.4.
4.1.4.
4.1.4. Serial(TTL)
Serial(TTL)
Serial(TTL)
Serial(TTL) interface
interface
interface
interface
The serial port is 3.3V TTL level ( 2 * TTL serial port, can be directly connected to customer's
MCU ) .

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name Description
TXD0 Uart0 transmit data pin
RXD0 Uart0 receive data pin
CTS0 Uart0 RS232 clear to send
RTS0 Uart0 require to send
RXD1 Uart1 receive data pin
TXD1 Uart1 transmit data pin
Diagram 4 - 3 connector interface(include uart0 and uart1)
4.2.
4.2.
4.2.
4.2. USR-TCP232-ED2
USR-TCP232-ED2
USR-TCP232-ED2
USR-TCP232-ED2
4.2.1.
4.2.1.
4.2.1.
4.2.1. Hardware
Hardware
Hardware
Hardware
Diagram 4 - 4 USR-TCP232-ED2
1) Mechanical dimesion : ( L × W × H) 44.45 × 31.75 × 15.4 (mm) including RJ45 and connector.
2) PCB dimension (L × W): 44.45 × 31.75 (mm) .
3) 5V 3.3V double power input, you can only choose 1 of them as input.
4) 3 * serial(3 * TTL, 3.3V).
5) TTL serial port support hardware flow control(RTS/CTS).