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TTL UART to Ethernet module USR-K7


2 in stock (can be backordered)

Ethernet to UART | Ethernet to Serial Modules


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Availability: 2 in stock (can be backordered)

2 in stock (can be backordered)

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TTL UART to Ethernet module USR-K7 Introduction

TTL UART to Ethernet module USR-K7 supports TCP server/client, UDP server/client, https client, Virtual COM, Also it supports Modbus RTU to Modbus TCP.

  • Supports flow control CTS/RTS, XON/XOFF.
  • Supports 10/100Base-T(X) self-adaptive Ethernet interface.
  • Configuration via Web Server page, AT commands, and Windows Utility.

Features of TTL UART to Ethernet module USR-K7

  • Virtual COM – Solves the problem that PC software as serial port can not communicate with networked devices.
  • Disconnection identification, automatic connection – Easy identification of dead links and auto re-connection to prevent data loss due to power outages and disconnections.

  • Modbus Gateway – Polling mechanism can effectively solve the problem of congestion caused by data concurrency (firmware 3009 or higher).
  • Custom built-in web page, Function of Web to Serial – Design built-in web pages according to project requirements, realize web page control, web page data acquisition.

Multiple Working Modes are Optional

Ethernet to Serial Module USR-K7 supports five working modes of TCP Client, TCP Server, UDP Client, UDP Server and https d Client. The data transmission can be realized with simple configuration.

Data Submitted Directly to Web Server

Supports the data interaction between the terminal device and the web server directly. Without considering the conversion process, the data request from the serial port to the https server can be realized quickly by simply setting parameters.


  • Networked Monitoring of Medical Machinery – USR-K7 can realize the data transmission between serial port and network quickly thus reducing the manpower on duty. At the same time, multiple medical devices can be combined into local network to realize real-time information.
  • Industrial Automation Network Monitoring – Many traditional serial port devices does not have networking capability. USR-K7 module integrated TCP/IP protocol stack can provide the solution of network communication between serial device to server via network based on socket to improve the level of industrial automation.
  • Networked Monitoring of Medical Devices – The power data of the distribution box needs to be collected and reported in real time.
    Tiny size Ethernet to serial module USR-K7 is industrial-grade design which can provide reliable and stable networking
    functions and suitable for the integrated project requirements of power monitoring.
SKU: module USR-K7 Categories: , ,
Item Parameter Value



Work Voltage DC 3.0~3.6 V,(3.3V best choice)
Work Current 130mA@3.3V
Ethernet RJ45、10/100Mbps; Auto switch between cross and direct connection
Package type Pin-in package
Baud Rate 600~1M(bps)










Network Protocol IP、TCP、UDP、DHCP、DNS、https、ARP、ICMP、Web socket
IP Static IP or DHCP
DNS Supports
Configure Setup software, Web-page configuration, AT command
Work Modem TCP Server/TCP Client/UDP Server/UDP Client
Modbus Modbus Gateway: Modbus RTU to TCP, Modbus Polling
Web to Serial Web socket: Web to serial
httpsd Client Supports
Class RFC2217 Supports
Customized Webpage Supports
Web Cache Send:16Kbyte;Receive:16Kbyte;
Serial Port Cache Send:2Kbyte;Receive:2Kbyte;
Average latency On Lan , the time<10ms
Software Setup Software, Virtual COM software






Certificate /
Protection 1.5KV Electromagnetic isolation
Size 35.0×19.39×18.25 mm(L*W*H)
Work Temp -40~85℃
Storage Temp -40~105℃
Work Humidity 5%~95% RH
Storage Humidity 5%~95% RH



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