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Ethernet Module USR-TCP232-E2-H7


Backorder (Delivery in 2-4 Weeks)

Embedded UART to Ethernet converter| Serial to Ethernet Converter Modules| 2-TTL UART


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Ethernet Module USR-TCP232-E2-H7 Introduction of 2-TTL UART

Ethernet Module USR-TCP232-E2-H7 is a dual UART to Ethernet converter module, industrial design, built-in fully optimized TCP/IP protocol stack, stable and reliable; supports virtual serial port VCOM; supports DNS domain name resolution, Keep-alive mechanism, hardware watchdog.

Features of Ethernet Module USR-TCP232-E2-H7

  • Support TCP server, TCP client and UDP, HTTP operating modes.
  • Support RS-485 enable pin of an external RS-485 transceiver.
  • Support flow control CTS/RTS, XON/XOFF.
  • Auto-MDI/MDIX,RJ45 port with 10/100Mbps.
  • Flexible data packet condition for the serial interface.
  • Support DHCP to configure IP address and other network configuration parameters.
  • Support DNS for remote server domain name lookup.
  • Support Modbus RTU to Modbus TCP/UDP.
  • Support Modbus over TCP/UDP.
  • Support three configuration method: serial AT command, PC software and web page.
  • Support local firmware upgrade by PC software.
  • Support “Keep-Alive” to guarantee TCP connection.
  • Support user password authorization for security.
  • Industrial temperature range (-40℃~+85℃).

Basic Function

  • E2 can realize two-way data transmission between TTL UART and Ethernet, Dual UART ports work independently at the same time, without mutual influence.
  • Multiple Working Modes – E2 supports five working modes: TCP Client, TCP Server, UDP Client, UDP Server, and HTTP Client, which can be flexibly selected according to the usage scenario.
  • Hardware Watchdog Protection – Built-in hardware watchdog, stable operation for 24 hours without downtime.
  • Configuration Software Upgrade – Parameters can be configured across network segments, the page is more concise. The firmware can be upgraded directly through the built-in webpage, which is convenient and quick.
  • Modbus Gateway – Support Modbus RTU and Modbus TCP protocol conversion, Support Modbus multi-host polling.
SKU: Module USR-TCP232-E2-H7 Categories: , ,
Item Parameter Description


Input Voltage VCC:3.0~3.6V, (3.3V recommended)

VDD:4.75~5.5V, (5.0V recommended)

Input Current 210mA@3.3V/155mA@5.0V
Dimensions 50.5×30.0x23.2mm(L*W*H)
Encapsulation DIP encapsulation
Operating Temperature -40~85℃
Storage Temperature -40~105℃
Operating Humidity 5%~95% RH(non-condensing)
Storage Humidity 5%~95% RH(non-condensing)
Certifications CE/FCC/ROSH
Interface Parameters


Ethernet Port Spec. RJ45, 10/100Mbps, auto MDI/MDIX
Ethernet Port No. 1
Serial Port Spec. UART TTL 3.3V
Serial Port No. 2
Serial Baud Rate 600-1M(bps)
Data Bit 7, 8
Parity None, Even, Odd
Flow Control None, RTS/CTS, XON/XOFF
RS-485 Pull-up and Pull-down Resistor 2.2KΩ
Software Parameters


IP Mode Static IP, DHCP
Modbus TCP Support
Websocket Support
HTTP Client Support
UDP Broadcast Support
User Configuring Setup utility, webpage, AT commands
Serial Packets Cache Dynamic packet cache.

For example:

When the packet length is 10 byte, the serial port can cache 450 packets(4.5KB).

When the packet length is 1460 bytes, the serial port can cache 10 packets(14.6KB).

Ethernet Packets Cache 48Kbyte

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