serial ethernet module
serial ethernet moduleserial to ipserial to ethernet
USR-TCP232-T2/$11.00 In stock

UART Serial to Ethernet TCP/IP Module with RJ45


Power: VCC 3.3~3.6 V.  VDD: 5.0-7.0V.
150mA (aver) / 160mA (max) @3.3V. 150mA (aver) / 160mA (max) @5V
Interface: 1) 1*TTL   2) 10M/100M Ethernet port(MDI/MDIX)
Certificate: CE, FCC, ROSH, WEEE.

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USR-TCP232-T2 is Serial UART to/over Ethernet TCP/IP Module with RJ45  for bidirectional data transparent transmission between UART and RJ45 Port. It is based on ARM processor and internally integrated Cortex-M0 core. User can configure parameter by web server or software to realize remote data acquisition, remote control and management.


  • Built in Web Server/Webpage for configuration.
  • User can modify the webpage.
  • HTTP Client: send data as HTTP format automatically. Serial data submitted to server by HTTP (GET/POST).
  • DHCP: automatically obtain an IP address and query IP address.
  • DNS address and MAC address can be modified.
  • 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. ????
  • Support router/bridge mode networking.
  • Can work in LAN, also can work in the Internet (external network)
  • Protocol: IP, TCP, UDP, DHCP, DNS, ARP, ICMP, HTTP Client.

1) Parameter configuration software.
2) Virtual serial port software(VCOM), Windows 2000 or higher (32 bit/64 bit)
Configuration method: (Manual P43)
1) Setting Software configuration: please download [USR-M0] Setup Software V2.1.2.118
2) Web Server configuration: Please input IP: 192.168.07. Name and Password: admin
Firmware upgrade via network by Setup Software. (Manual P28)
Factory Setting: (Manual P26)
Hardware reset: Pull down nReload Pin (Pin 7) for 3 seconds or more.
Software reset: Enter AT command mode, use AT command AT+RELD.

Serial Ethernet Module TCP232-T2 can work in TCP Client, TCP Server, UDP Client,UDP Server Mode Transparent Transmission Mode

1)In TCP Client Mode: Client connects Server automatically. The IP and COM number of Client should be same as Server.
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: UDP broadcast function, send and receive data from all IP in the network.
4)In UDP Server Mode: send data from serial port to Target IP.


  • 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 system.

Basic Information
VoltageVCC DC 3.0V~3.6V
VDD DC 5~7.0V
Current150mA (aver) / 160mA (max) @3.3V
150mA (aver) / 160mA (max) @5V
Working Temp-25 ~ 75°C
Storage Temp-40 ~ 105°C, 5 ~ 95% RH
Size50.5 x 22.6 x 15.0 mm
Serial Port
Baud Rate600 bps ~ 460.8Kbps
Data Bit5, 6, 7, 8
Stop Bit1, 2
Check BitNone, Even, Odd, Space, Mark
RS485 Control PinYes
BufferRX: 800K bytes
Ethernet Port
Speed10/100 Mbps, Auto MDI/MDIX
BufferTX: 6K bytes, RX: 4K bytes
Protection1.5KV electrical isolation

User Manual

[Datasheet] USR-TCP232-T2 Datasheet | download
[User Manual] USR-TCP232-T2 Hardware Manual | download
[User Manual] USR-TCP232-T2 User Manual V1.1 | download
[Selection Table] Ethernet Module Selection Table | download
[AT Command] USR-M0 AT Command Set | download

Development File

[Demo Code] TCPIP Demo Code | download
[Customized Webpage] USR-TCP232-T2 Customized Webpage_V4015 | download
[Customized Webpage] USR-TCP232-T2 Customized Webpage_V4017 | 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.
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