USR-TCP232-S2 Ethernet Module UART Port

Communication Expert of Industrial IOT
USR-TCP232-S2 Ethernet Module UART Port
USR-TCP232-S2 Ethernet Module UART Port
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Price: $10.40
Availability: In Stock
Model: USR-TCP232-S2
Manufacturer: USR IOT
Average Rating: Not Rated

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User Manual:

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USR-TCP232-S2 are tiny size SMT Ethernet modules which can realize data bidirectional transparent transmission between TTL and Ethernet Port. It can also be applied in RS232/ RS485 by level shift circuit. USR-TCP232-S2 is based on Cortex-M0 core. It has characters of low power, fast speed and high efficiency.


  • 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.

Work Mode

SMT Ethernet Modules USR-TCP232-S2 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.


Parameter Value
Input Voltage DC 3.0 ~ 3.6V
Input Current 150mA (aver) / 160mA (max) @3.3V
Certificate CE(EMC+LVD), FCC, ROHS ,WEEE
Size 33 x 20.3 x 2 mm
Operating Temp. -25 ~ 75°C
Storage Temp. -40 ~ 105°C, 5 ~ 95% RH(no condensation)
Interface TTL
Network Protocol IP, TCP, UDP, ARP, ICMP, DHCP, DNS, HTTPD Client
Packing list USR-TCP232-S2 *1


  • 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

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