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USR-TCP232-E2 Serial UART TTL to Ethernet Module

  • $49.00
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    USR-TCP232-E2 Serial UART TTL to Ethernet Module

    • 2 TTL UART to Ethernet Modules USR-TCP232-E2 supports 2*TTL (UART over Ethernet) working at the same time.
    • Supports TCP server/client, UDP server/client, https client, Virtual COM
    • Supports Modbus RTU to Modbus TCP
    • Supports flow control CTS/RTS, XON/XOFF
    • Support 2 TTL serial ports working independently
    • Configuration via Web Server page, AT commands, and Windows Utility

    Serial TTL to Ethernet modules USR-TCP232-E2 are used for data transparent transmission. 2-TTL to Ethernet Modules USR-TCP232-E2 support 2*TTL working at the same time, which are based on Cortex-M4 solution and its basic frequency is up to 120MHz. The internal of the module integrates TCP/IP protocol stack.


    System Information
    Processor Cortex-M4
    Basic Frequency 120MHz
    Flash 512K byte
    Port Number 1
    Interface Standard 8 pin RJ45 (with network transformer)
    Rate 10/100 Mbps,MDI/MDIX, auto switch between cross and direct connection
    Protection 2KV electromagnetism isolation
    Network Protocol IP, TCP, UDP, DHCP, DNS, https, ARP, ICMP, Web socket, httpsd client
    Receive Buffer Max. 16k bytes buffer
    Port Number 2 (2*TTL, can work at the same time)
    Interface Standard TTL: 2.54 pin 3.3V
    Data Bits 5, 6, 7, 8
    Stop Bit 1, 1.5, 2
    Check Bit None, Even, Odd, Space, Mark
    Baud Rate 600 bps ~ 1024K bps
    Flow Control RTS/CTS
    Buffer Send and receive 2k bytes respectively
    RS-485 Pull-up and Pull-Down Resistor Null, reserved 485 send-receive control pin
    Virtual Serial(USR-VCOM) Windows 2000 or higher (2 bit/64 bit)
    Configuration Built-in webpage, computer set-up software, serial command
    Basic Parameter
    Size 55 x 30 x 23.2 (including Ethernet port and pin)
    Operating Temp. -40 ~ 85°C (industry)
    Storage Temp. -40 ~ 105°C, 5 ~ 95% RH
    Input Voltage DC 3.3 / 5 V
    Working Current 120mA @ 3.3V
    120mA @ 5V
    Power <1W
    Certificate CE, FCC, ROHS
    Warranty 2 years
    Accessory Null


    Features of TTL to Ethernet Modules USR-TCP232-E2

    Cortex-M4 kernel, industrial working temperature range and TCPIP protocol stack.

    Auto-MDI/MDIX, RJ45 port with 10/100Mbps

    TCP Server, TCP Client, UDP Client, UDP Server and httpsD Client work mode

    Multi-ports can work independently at the same time

    Can distinguish which serial port connects to the device via port number

    Support virtual serial port and provide corresponding software USR-VCOM

    Serial baud rate from 600bps to 1024K bps; Check bit of None, Odd, Even, Mark and Space

    DNS and DHCP supported

    Provide PC TCP/IP socket programming example such as VB,C++, Delphi, Android and IOS

    Built-in webpage; also can customize webpage for users

    Reload button, one key to restore default settings

    RJ45 with Link/Data indicator light, built-in isolation transformer and 2 KV electromagnetic isolation

    The global unique MAC address bought from IEEE (begin with D8-B0-4C); user can define MAC address

    Support upgrade firmware via network

    Support keepalive, rapidly detect dead links

    Support account and password, can be used to page login and network settings

    Support one channel Websocket, realize bidirectional transparent transmission between webpage and serial 0

    Support Modbus RTU to Modbus TCP

    Support UDP broadcast function


    Application Field of UART over Ethernet Modules USR-TCP232-E2

    Industrial data transmission, industrial automation

    security and protection monitoring, public security

    Smart home, power control, environmental monitoring, intelligent agriculture

    Door check on work attendance system, POS system, rice selling system

    Building automation system, power monitoring, self-service banking system, telecom machine room monitoring


    Data Submitted to Web Server Directly


    Work Mode of UART over Ethernet Modules USR-TCP232-E2

    TCP Client Mode

    The module starts a connection to all set TCP Server, if the connection fails, the module will try to reconnect till success if connection succeeds, Server will transmit data with a serial device.

    TCP Server Mode

    The module monitors the set and waits for TCP Client to connect data sent by serial device will transmit to all successfully-linked Clients via module.

    UDP Mode

    The module sends data of serial device to the set network device. Module monitors port and sends the received data to serial device.

    Application of TTL to Ethernet Modules USR-TCP232-E2

    Remotely manage multiple serial devices

    Use network to extend serial communication distance

    Multiple PC to remotely manage serial device

    Various parameter setting method

    Software Settings
    Download settings software, search Ethernet Modules in the LAN through the serial port server IP, name, MAC address, or the version number. Then set the parameters you need, otherwise, keep the default.

    Web-page Settings

    Open your browser and inter the default IP address of the Ethernet Modules.

    Open the login page of Serial Server, Enter the user name and password (default admin).

    After setting parameter, Click Save and Restart, then setting will take effect.

    Serial AT commands Settings
    User can set parameter by module itself without going through another computer to configure. This setting method is used in the following situation: user have to configure IP address and destination IP address on site. AT command can meet the demand. After MCU connects serial server module by TTL (UART), MCU can configure setting by AT command.


    • Documents
    USR-TCP232-E2 Datasheet
    • Development Files

    • Utilities
    USR-TCP232-M4&E45 Setup V2.1.2.220


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