USR IOT USR-TCP232-306 User manual

USR-TCP232-306 User Manual Technical Support: h.usriot.com
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USR-TCP232-306 User Manual
File Version: V1.0.1.01

USR-TCP232-306 User Manual Technical Support: h.usriot.com
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Contents
USR-TCP232-306 User Manual ...........................................................................................................................1
Features.....................................................................................................................................................................3
1. Get Start .................................................................................................................................................................4
1.1. Application Diagram................................................................................................................................4
1.2. Hardware Design......................................................................................................................................5
1.2.1. Hardware Dimensions.................................................................................................................5
1.2.2. DB9 Pin definition.........................................................................................................................5
1.2.3. RS422/RS485 Pin definition .......................................................................................................6
1.2.4. LED...................................................................................................................................................6
2. Product Functions ...............................................................................................................................................7
2.1. Basic Functions.........................................................................................................................................7
2.1.1. Static IP/DHCP ...............................................................................................................................7
2.1.2. Restore default settings ...............................................................................................................8
2.1.3. Upgrade Firmware Version .........................................................................................................8
2.2. Socket functions .......................................................................................................................................9
2.2.1. TCP Client .......................................................................................................................................9
2.2.2. TCP Server....................................................................................................................................10
2.2.3. UDP Client ....................................................................................................................................11
2.2.4. UDP Server ...................................................................................................................................13
2.2.5. HTTPD Client...............................................................................................................................14
2.3. Serial port................................................................................................................................................14
2.3.1. Serial port basic parameters....................................................................................................14
2.3.2. VCOM Application .......................................................................................................................15
2.3.3. Serial Package Methods.............................................................................................................15
2.3.4. Baud Rate Synchronization.......................................................................................................15
2.4. Features....................................................................................................................................................16
2.4.1. Identity Packet Function ............................................................................................................16
2.4.2. Heartbeat Packet Function .......................................................................................................17
2.4.3. Editable Web server ....................................................................................................................17
2.4.4. Reset function..............................................................................................................................17
2.4.5. Index function..............................................................................................................................18
2.4.6. TCP Server setting.......................................................................................................................19
2.4.7. Non-persistent Connection.......................................................................................................20
2.4.8. Timeout Reset function .............................................................................................................20
3. Parameter Setting..............................................................................................................................................21
3.1. Setup software Configuration...............................................................................................................21
3.2. Web Server Configuration ....................................................................................................................21
3.3. AT Command...........................................................................................................................................22
3.3.1. Serial AT Command ....................................................................................................................22
4. Contact Us............................................................................................................................................................23
5. Disclaimer...........................................................................................................................................................23
6. Update History ...................................................................................................................................................23

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Features
10/100Mbps Ethernet port, support Auto-MDI/MDIX.
Support TCP Server, TCP Client, UDP Client, UDP Server, HTTPD Client.
Support Baud rate from 600bps to 230.4bps; Support None, Odd, Even, Mark, Space.
Support heartbeat packet and identity packet.
Support RS232, RS485 and RS422.
Support web server, AT command and setup software to configure module.
Support timeout reset function.
Support TCP Client non-persistent function.
Support DHCP/Static IP.
Support software/hardware reload.
Support virtual serial port with USR-VCOM software.

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1. Get Start
Product link:
http://www.usriot.com/p/serial-rs232-rs485-rs422-to-ethernet/
Setup software:
http://www.usriot.com/usr-m0-setup-software/
Figure 1 Download Page
If you have any question, please submit it back to customer center: http://h.usriot.com
1.1. Application Diagram
Figure 2 Application diagram

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1.2. Hardware Design
1.2.1. Hardware Dimensions
Figure 3 Hardware dimensions
1.2.2. DB9 Pin definition
Pin
2
3
5
1, 4, 6, 7, 8
9
Definition
RXD
TXD
GND
NC
Default NC, can be
used as power pin
Figure 4 DB9 Pin

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1.2.3. RS422/RS485 Pin definition
Figure 5 RS422/RS485 pin definition
RS422: R+/R- are RS422 RXD pins and T+/T- are RS422 TXD pins.
RS485: A/B are RS485 RXD/TXD pins.
1.2.4. LED
Indicator
Status
PWR
On: Power on
Off: Power off
WORK
Flash a period every one second: Working normally
Flash a period every 200ms: Upgrading status
Off: Not working
LINK
LED for Link function. Link function can only work in TCP
Client/Server mode. TCP connection established, LINK on;
TCP connection disconnect normally, LINK off
immediately; TCP connection disconnect abnormally, Link
off with about 40 seconds delay.
Enable Link function in UDP mode, LINK on.
TX
On: Sending data to serial
Off: No data sending to serial
RX
On: Receiving data from serial
Off: No data receiving from serial
Figure 6 LED

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2. Product Functions
This chapter introduces the functions of USR-TCP232-306 as the following diagram shown, you can get an overall
knowledge of it.
Serial
Port
Device
Network
Socket TCP Server/TCP Client/UDP
Server/UDP Client/HTTPD Client
HTTPD Client Mode
Serial port
packaging HTTPD GET/POST
AT Command Mode
Serial AT command Parameter Query/Set
Serial
port
Keep-Alive
Serial port
packaging
Serial port heartbeat packet Network heartbeat packet
HTTPD protocol
packaging 1
Identity
packet
Figure 7 Product Functions diagram
2.1. Basic Functions
2.1.1. Static IP/DHCP
There are two ways for module to get IP address: Static IP and DHCP.
Static IP: Default setting of module is Static IP and default IP is 192.168.0.7. When user set module in Static IP mode,
user need set IP, subnet mask and gateway and must pay attention to the relation among IP, subnet mask and
gateway.
DHCP: Module in DHCP mode can dynamically get IP, Gateway, and DNS server address from Gateway Host. When
user connect directly to PC, module can’t be set in DHCP mode. Because common computer does not have the
ability to assign IP addresses.
User can change Static IP/DHCP by setup software. Setting diagram as follow:

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Figure 8 Static IP/DHCP
2.1.2. Restore default settings
Hardware: User can press Reload over 5 seconds and less than 15 seconds then release to restore default settings.
Software: User can use setup software to restore default settings.
AT command: User can enter AT command mode and use AT+RELD to restore default settings.
2.1.3. Upgrade Firmware Version
User can contact to salespersons for needed firmware version and upgrade by setup software as follow:
Figure 9 Upgrade firmware version

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2.2. Socket functions
TCP232-306 socket support TCP Server, TCP Client, UDP Server, UDP Client and HTTPD Client.
2.2.1. TCP Client
TCP Client provides Client connections for TCP network services. TCP Client device will connect to server to
realize data transmission between the serial port and server. According to the TCP protocol, TCP Client has
connection/disconnection status differences to ensure reliable data transmission.
TCP Client mode support Keep-Alive function: After connection is established, module will send Keep-Alive
packets about every 15 seconds to check the connection and will disconnect then reconnect to TCP server if
abnormal connection is been checked by Keep-Alive packets. TCP Client mode also support non-persistent
function.
TCP232-306 work in TCP Client mode need connect to TCP Server and need set the parameters: Remote Server
Addr and Remote Port Number. TCP232-306 work in TCP Client won’t accept other connection request except
target server and will access server with random local port if user set local port to zero.
User can set TCP232-306 in TCP Client mode and related parameters by setup software or web server as follows:

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Figure 10 TCP Client
2.2.2. TCP Server
TCP Server will listen network connections and build network connections, commonly used for communication
with TCP clients on a LAN. According to the TCP protocol, TCP Server has connection/disconnection status
differences to ensure reliable data transmission.
TCP Server mode also support Keep-Alive function.
TCP232-306 work in TCP Server mode will listen local port which user set and build connection after receiving
connection request. Serial data will be sent to all TCP Client devices connected to TCP232-306 in TCP Server
mode simultaneously.
TCP232-306 work in TCP Server support 16 client connections at most and will kick off oldest connection beyond
maximum connections(User can enable/disable this function by web server).
User can set TCP232-306 in TCP Server mode and related parameters by setup software or web server as follows:

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Figure 11 TCP Server
2.2.3. UDP Client
UDP transport protocol provides simple and unreliable communication services. No connection connected
/disconnected.

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In UDP Client mode, TCP232-306 will only communicate with target IP/Port. If data not from target IP/Port, it
won’t be received by TCP232-306.
In UDP Client mode, if user set remote IP as 255.255.255.255, TCP232-306 can broadcast to entire network
segment and receive broadcast data. After firmware version 4015, 306 support broadcasting in same network
segment.(Such like xxx.xxx.xxx.255 broadcasting way).
User can set TCP232-306 in UDP Client mode and related parameters by setup software or web server as follows:
Figure 12 UDP Client

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2.2.4. UDP Server
In UDP Server mode, TCP232-306 will change target IP every time after receiving UDP data from a new IP/Port
and will send data to latest communication IP/Port.
User can set TCP232-306 in UDP Server mode and related parameters by setup software or web server as follows:
Figure 13 UDP Server

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2.2.5. HTTPD Client
In HTTPD Client mode, TCP232-306 can achieve data transmission between serial port device and HTTP server.
User just need set TCP232-306 in HTTPD Client and set the HTTPD header, URL and some other related
parameters, then can achieve data transmission between serial port device and HTTP server and don’t need care
about the HTTP format of data.
User can set TCP232-306 in HTTPD Client mode and related parameters by web server as follow:
Figure 14 HTTPD Client
2.3. Serial port
TCP232-306 support RS232/RS485/RS422. User can refer to 1.2.2. DB9 Pin definition 1.2.3. RS422/RS485
Pin definition to connect and RS232/RS485/RS422 can’t be used simultaneously.
2.3.1. Serial port basic parameters
Parameters
Default
Range
Baud rate
115200
600~230.4Kbps
Data bits
8
5~8
Stop bits
1
1~2
Parity
None
None, Odd, Even, Mark, Space
Figure 15 Serial port parameters

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2.3.2. VCOM Application
User can download VCOM software from http://www.usriot.com/usr-vcom-virtual-serial-software/. Through
this software user can set up connection between TCP232-306 and virtual serial to solve the problem that
traditional equipment PC software used in serial port communication way.
2.3.3. Serial Package Methods
For network speed is faster than serial. Module will put serial data in buffer before sending it to network. The data
will be sent to Network as Package. There are 2 ways to end the package and send package to network - Time
Trigger Mode and Length Trigger Mode.
TCP232-306 adopt fixed Package time (four bytes sending time) and fixed Package length (400 bytes).
2.3.4. Baud Rate Synchronization
When module works with USR devices or software, serial parameter will change dynamically according to
network protocol. Customer can modify serial parameter by sending data conformed to specific protocol via
network. It is temporary, when restart module, the parameters back to original parameters.
User can adopt Baud Rate Synchronization function by setup software as follows:
Figure 16 Baud Rate Synchronization

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2.4. Features
2.4.1. Identity Packet Function
Figure 17 Identity Packet application diagram
Identity packet is used for identify the device when module works as TCP client/UDP client. There are two sending
methods for identity packet.
Identity data will be sent when connection is established.
Identity data will be add on the front of every data packet.
Identity packet can be MAC address or user editable data (User editable data at most 40 bytes). User can set
TCP232-306 with Identity Packet function by web server as follow:
Figure 18 Identity Packet

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2.4.2. Heartbeat Packet Function
Heartbeat packet: Module will output heartbeat data to serial or network periodic. User can configure the
heartbeat data and time interval. Serial heartbeat data can be used for polling Modbus data. Network heartbeat
data can be used for showing connection status and keep the connection (only take effect in TCP/UDP Client
mode). Heartbeat packet allow 40 bytes at most.
User can set TCP232-306 with Heartbeat Packet function by web server as follow:
Figure 19 Heartbeat Packet
2.4.3. Editable Web server
TCP232-306 support user modify the web server based on template according to needs, then use related tool to
upgrade. If user have this demand can contact to our salespersons for web server source and tool.
2.4.4. Reset function
When 306 work in TCP Client mode, 306 will connect to TCP Server. When user open Reset function, 306 will
restart after trying connecting to TCP Server 30 times but still can’t connect to.
User can enable/disable the Reset function by setup software as follow:

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Figure 20 Reset function
2.4.5. Index function
Index function: Used in situation when 306 work in TCP Server mode and establish more than one connection to
TCP Client. After open Index function, 306 will mark every TCP Client to distinguish them. User can send/receive
data to/from different TCP Client according to their unique mark.
User can enable/disable the Index function by setup software as follow:
Figure 21 Index function

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2.4.6. TCP Server setting
306 work in TCP Server mode allow at most 16 TCP Clients connection. Default is 4 TCP Clients and user can
change maximum TCP Clients connection by web server. When TCP Clients more than 4, user need make every
connection data less than 200 bytes/s.
If TCP Clients connected to 306 exceed maximum TCP Clients, user can enable/disable kick off old connection
function by web server.
User can set above TCP Server settings by web server as follow:
Figure 22 TCP Server setting

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2.4.7. Non-persistent Connection
TCP232-306 support non-persistent connection function in TCP Client mode. When TCP232-306 adopt this
function, TCP232-306 will connect to server and send data after receiving data from serial port side and will
disconnect to server after sending all the data to server and no data from serial port side or network side over a
fixed time. This fixed time can be 2~255s, default is 3s. User can set TCP232-306 with non-persistent connection
function by web server as follow:
Figure 23 Non-persistent Connection
2.4.8. Timeout Reset function
Timeout reset function(no data reset): If network side no data transmission beyond a fixed time(User can set this
fixed time between 60~65535s, default is 3600s. If user set a time less than 60s, this function will be disable), 306
will reset. User can set the Timeout Reset function by web server as follow:
Figure 24 Timeout Reset function