ethernet rs232 converter
rs232 to tcp ipRS232 to Ethernet Converter
USR-TCP232-302/$24.00 In stock

Low Cost Serial RS232 to Ethernet TCP/IP Converter with DHCP/DNS


Power: DC 4.7~7 V
Interface: 1) 1*RS232 . 2) 10M/100M Ethernet port(MDI/MDIX)
Certificate: CE, FCC, ROHS, WEEE.

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Introduction  (RS232 to Ethernet Converter)
USR TCP232-302 is Serial RS232 to Ethernet TCP/IP Converter for bidirectional data transparent transmission. It is based on ARM processor and internally integrated with TCP/IP protocol.

Function (RS232 to Ethernet Converter)

  • Built in Web Server/Webpage for configuration.
  • User can modify the webpage.
  • HTTP Client: send data as HTTP format automatically.
  • Support DHCP client: automatically obtain an IP address and query IP address.
  • DNS address can be modified.
  • User Defined MAC address.Can work in LAN, also can work in the Internet (external network)
  • Provide PC TCP/IP socket programming example such as VB,C++,Delphi,Android and IOS
  • Synchronous and adaptive serial port baud rate.
  • Registration packet: identified header can be added to packets to check connection status
  • Heartbeat packet: can be sent to serial or network periodic. To ensure connection is reliable, put an end to dead link.
  • The Max Client number can be modified, from 1 to 16.

1) Parameter configuration software.
2) Virtual serial port software(VCOM), Windows 2000 or higher (32 bit/64 bit)
Factory Setting:
1) Hardware reset: Pull down Reload for 5 -15 seconds , then release it.
2) Software reset: Enter AT command mode, use AT command AT+RELD.
Firmware upgrade via network by Setup Software ( Manual P25)

Work Mode
Serial Device Server RS232 to TCP/IP Converter TCP232-302 can work as TCP Client, TCP Server, UDP Client, UDP Server Mode.
1) In TCP Client Mode: Client connects Server automatically. User should configure the TCP Server’s IP address and Port.
2) In TCP Server Mode: The Max Client number can be modified from 1 to 16. By default, Client number is 4.
3) In UDP Client Mode: serial data will be sent to a fix IP address/port which you appointed.
4) In UDP Server Mode: serial data will be sent to last source IP/Port.

rs232 to ethernet

Application (RS232 to Lan Converter)

  • Industrial automation control for data transmission.
  • Security monitoring, CCTV, entrance guard system, Building automation system
  • Smart home: smart switch, thermos controller.
  • Environmental monitoring, temperature and humidity monitoring.
  • Logistic transportation supervision and location

rs232 to ethernet converter


Basic Information
VoltageDC 4.75 ~ 7V
Current150mA(aver) @ 5V
Working Temp-25 ~ 75°C
Storage Temp-40 ~ 105°C, 5 ~ 95% RH
Size71 x 60 x 25 mm
Serial Port
Interface1*RS232: DB9 female connector
Baud Rate600bps ~ 230.4Kbps
Data Bit5, 6, 7, 8
Stop Bit1, 2
Check BitNone, Even, Odd, Space, Mark
BufferReceive: 2K bytes
Ethernet Port
Speed10/100 Mbps, Auto MDI/MDIX
BufferTX: 6K bytes. RX: 4K bytes
Ethernet Port 1.5KV electrical isolation
Power SupplyReverse protection, ESD protection, Surge protection
Accessory5V1A Power Supply
Warranty2 Years

User Manual

[Datasheet] USR-TCP232-302 Datasheet | download
[User Manual] USR-TCP232-302 User Manual | download
[Selection Table] Serial Device Server Selection Table | download
[AT Command] USR-TCP232-302 AT Command Set | download

Development File

[Demo Code] TCPIP Demo Code | download
[Customized Webpage] USR-TCP232-302 Customized Webpage_V4015 | download
[Customized Webpage] USR-TCP232-302 Customized Webpage_V4016 | download

Application Software

[USR-VCOM] Virtual Serial Software V3.7.1.520 | download
[USR-TCP-Test] Testing Software | download
[USR-TCP-Test_android] Testing Software | download
[USR-M0] Setup Software | download

Product Certificates

[Certificate] M0 Series CE FCC ROHS WEEE Certificate | download

Company File

[Product Catalog] USR Product Catalog | download


All USR products will be tested by R&D first, then production test again.(ESD Test,Surge/EFT Test, High/Low Temperature Test, EMC and LVD environment reliability test, etc.) Click here to watch test videos.
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USR products are exported to more than 100 countries and regions, get approvals like CE, FCC, ROHS, CCC, KC, IC, SRRC, etc.
USR product certificate
We also offer fast and reliable After-Sales Service, Leave your questions in Ticket System and we will respond to you in 15 minutes.
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