---
product_id: 37132228
title: "USR-TCP232-302 Tiny Size RS232 to TCP IP Converter Serial RS232 to Ethernet Server Module Ethernet Converter Support DHCP/DNS (1)"
brand: "pusr"
price: "£33.40"
currency: GBP
in_stock: true
reviews_count: 13
category: "Pusr"
url: https://www.desertcart.co.uk/products/37132228-usr-tcp232-302-tiny-size-rs232-to-tcp-ip-converter
store_origin: GB
region: United Kingdom
---

# Baud rate up to 230.4 Kbps 10/100Mbps RJ45 Ethernet port Supports TCP/UDP modes & DHCP/DNS USR-TCP232-302 Tiny Size RS232 to TCP IP Converter Serial RS232 to Ethernet Server Module Ethernet Converter Support DHCP/DNS (1)

**Brand:** pusr
**Price:** £33.40
**Availability:** ✅ In Stock

## Summary

> 🚀 Upgrade your legacy gear to smart network power!

## Quick Answers

- **What is this?** USR-TCP232-302 Tiny Size RS232 to TCP IP Converter Serial RS232 to Ethernet Server Module Ethernet Converter Support DHCP/DNS (1) by pusr
- **How much does it cost?** £33.40 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/37132228-usr-tcp232-302-tiny-size-rs232-to-tcp-ip-converter)

## Best For

- pusr enthusiasts

## Why This Product

- Trusted pusr brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Compact Powerhouse:** Tiny footprint with global unique MAC and firmware upgrade via web keeps your setup future-proof and sleek.
- • **Reliable Connection Assurance:** Heartbeat and custom packet mechanisms eliminate dead links, ensuring your data never drops.
- • **Robust Multi-Protocol Support:** Operate as TCP Server/Client, UDP Server/Client, or HTTPD Client to fit any industrial or smart environment.
- • **Plug & Play Network Integration:** Auto DHCP and DNS support means zero hassle IP configuration—just power up and connect.
- • **Seamless Serial-to-Ethernet Bridge:** Effortlessly connect legacy RS232 devices to modern networks with transparent bidirectional data transmission.

## Overview

The USR-TCP232-302 is a compact, cost-effective RS232 to Ethernet converter designed for transparent, bidirectional data transmission. Featuring 10/100Mbps Ethernet, baud rates up to 230.4 Kbps, and versatile TCP/UDP modes, it supports DHCP/DNS for effortless network integration. Ideal for industrial automation, smart homes, and security systems, it ensures reliable connections with heartbeat mechanisms and offers easy firmware upgrades via web interface.

## Description

USR-TCP232-302 is a low-cost serial device server,whose function is to realize bidirectional transparent transmission between RS232 and Ethernet. Features of RS232 Ethernet Server Support DHCP, automatically obtain an IP address and query IP address through serial setting protocol Support DNS function Set parameters through webpage Upgrade firmware via network Auto-MDI/MDIX, RJ45 port with 10/100Mbps Serial port baud rate from 600 bps to 230.4 Kbps, Check bit of None, Odd, Even, Mark and Space Work mode: TCP Server, TCP Client, UDP Client, UDP Server, HTTPD Client Support virtual serial port and provide corresponding software USR-VCOM Heartbeat package mechanism to ensure connection is reliable, put an end to dead link User-defined registration package mechanism, check connection status and use as custom packet header Under TCP Server mode, Client number ranges from 1 to 16; default number is 4 The global unique MAC address bought from IEEE, user can define MAC address Restore factory default Across the gateway, switches, routers Can work in LAN, also can work in the Internet (external network) Provide PC TCP/IP socket programming example such as VB,C++,Delphi,Android and IOS Support customization Application Field of RS232 Ethernet Server 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 Package includes（1Piece Pack）: 1* RS232 to TCP IP Converter 1* Power Adapter

Review: el producto - bueno
Review: Great for older PLC's - Got this to work with an ALLEN BRADLEY SLC 5/04 PLC processor. Had to take it out of it's metal case because I did not have a Male to Female DB9 cable at the time. At first it wouldn't work because I had a null modem adapter between the usr and processor. The pinout in the manual for the usr led me to believe that i needed to flip flop the Rx & Tx lines. But after removing the null adapter, it worked. So either it was wrong, or the pinout for my PLC was wrong. I got it setup up on a static IP on my home network and can access it anywhere with anything (including VNC'ing into my server with a smartphone from work. I was able to go online with the PLC from 3 different computers at the same time even. It did take some time setting up the serial comms options so it's not a "Pull it out of the box, plug it in and it works" thing. If baud rate, parity, RTS, DF1, CRC, or packet size are foreign words to you, buy this at your own risk. Or actually, do buy it. If you don't know anything about how RS232 comms work, this would be a great learning tool. If it works on ALLEN BRADLEY'S proprietary DF1 protocol (which this thing does not know what that is and nothing else on this planet uses it), then it will work on anything.

## Features

- This is a serial RS232 to Ethernet server, used for data transparent transmission. USR-TCP232-302 is a low-cost serial device server,whose function is to realize bidirectional transparent transmission between RS232 and Ethernet. USR-TCP232-302 is internally integrated with TCP/IP protocol. User can apply it to device networking communication.
- Support DHCP, automatically obtain an IP address and query IP address through serial setting protocol, Support DNS function, Set parameters through webpage, Upgrade firmware via network.
- Auto-MDI/MDIX, RJ45 port with 10/100Mbps, Serial port baud rate from 600 bps to 230.4 Kbps, Check bit of None, Odd, Even, Mark and Space.
- Work Mode: TCP Server, TCP Client, UDP Client, UDP Server, HTTPD Client. Support virtual serial port and provide corresponding software USR-VCOM, Heartbeat package mechanism to ensure connection is reliable, put an end to dead link, User-defined registration package mechanism, check connection status and use as custom packet header.
- Under TCP Server mode, Client number ranges from 1 to 16; default number is 4, The global unique MAC address bought from IEEE, user can define MAC address, Across the gateway, switches, routers, Can work in LAN, also can work in the Internet (external network).

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01GPGPEBM |
| Best Sellers Rank | #64 in Serial Adapters |
| Brand | PUSR |
| Built-In Media | power adapter |
| Color | Server +Terminal part |
| Compatible Devices | Desktop |
| Connector Type | Rs232 |
| Customer Reviews | 4.0 out of 5 stars 228 Reviews |
| Item Dimensions | 3.15 x 1.97 x 1.18 inches |
| Item Weight | 0.44 Pounds |
| Item dimensions L x W x H | 3.15 x 1.97 x 1.18 inches |
| Manufacturer | PUSR |
| Mfr Part Number | USR-TCP232-302 |
| Model Number | USR-TCP232-302 |
| Number of Items | 1 |
| Number of Ports | 1 |
| Package Quantity | 1 |
| Power Plug Type | Type A - 2 pin (North American), Type B - 3 pin (North American) |
| Smart Home Compatibility | Smart Home Compatible |
| Specific Uses For Product | Transmit data transparently between TCP/IP and RS232 |
| UPC | 702669842709 613852195338 740030459484 |
| Unit Count | 1 Count |
| Warranty Description | 1 |

## Product Details

- **Color:** Server +Terminal part
- **Compatible Devices:** Desktop
- **Connector Type:** Rs232
- **Item dimensions L x W x H:** 3.15 x 1.97 x 1.18 inches
- **Specific Uses For Product:** Transmit data transparently between TCP/IP and RS232

## Images

![USR-TCP232-302 Tiny Size RS232 to TCP IP Converter Serial RS232 to Ethernet Server Module Ethernet Converter Support DHCP/DNS (1) - Image 1](https://m.media-amazon.com/images/I/61mlZeH+gSL.jpg)
![USR-TCP232-302 Tiny Size RS232 to TCP IP Converter Serial RS232 to Ethernet Server Module Ethernet Converter Support DHCP/DNS (1) - Image 2](https://m.media-amazon.com/images/I/51+h2S056yL.jpg)
![USR-TCP232-302 Tiny Size RS232 to TCP IP Converter Serial RS232 to Ethernet Server Module Ethernet Converter Support DHCP/DNS (1) - Image 3](https://m.media-amazon.com/images/I/41mQow5AQJL.jpg)
![USR-TCP232-302 Tiny Size RS232 to TCP IP Converter Serial RS232 to Ethernet Server Module Ethernet Converter Support DHCP/DNS (1) - Image 4](https://m.media-amazon.com/images/I/51p57jlI9zL.jpg)
![USR-TCP232-302 Tiny Size RS232 to TCP IP Converter Serial RS232 to Ethernet Server Module Ethernet Converter Support DHCP/DNS (1) - Image 5](https://m.media-amazon.com/images/I/61JlT9RyQJL.jpg)

## Questions & Answers

**Q: Does the included terminal software support sending a SysRq break signal to the remote console (if it's a rs232 linux tty)?**
A: It transmits data in binary, so if the bits go in one end, they come out the other. This works even to the point of passing RS485 multidrop addresses. Since SysRq is just a key sequence represented by a binary sequence, as long as your source device doesn't intercept it, it will come out at the remote RS232 interface.

**Q: Does this item come with an AC adaptor to provide the 5vdc?**
A: yes

**Q: I’d like to control a remote projector that only has an Rs232 port.  Can each device be given a static ip?**
A: Each device be given a static ip,but this product is a data transmission device. If you want to control a remote projector,we recommend the USR-IO424T-EWR.

**Q: is the serial port modbus compatable?**
A: it support transparent modbus data.do not support modbus RTU to modbus TCP.
pls refer model USR-TCP232-410s which support modbus RTU to modbus TCP.

## Customer Reviews

### ⭐⭐⭐⭐⭐ el producto
*by J***. on March 26, 2026*

bueno

### ⭐⭐⭐⭐⭐ Great for older PLC's
*by L***. on November 18, 2018*

Got this to work with an ALLEN BRADLEY SLC 5/04 PLC processor. Had to take it out of it's metal case because I did not have a Male to Female DB9 cable at the time. At first it wouldn't work because I had a null modem adapter between the usr and processor. The pinout in the manual for the usr led me to believe that i needed to flip flop the Rx & Tx lines. But after removing the null adapter, it worked. So either it was wrong, or the pinout for my PLC was wrong. I got it setup up on a static IP on my home network and can access it anywhere with anything (including VNC'ing into my server with a smartphone from work. I was able to go online with the PLC from 3 different computers at the same time even. It did take some time setting up the serial comms options so it's not a "Pull it out of the box, plug it in and it works" thing. If baud rate, parity, RTS, DF1, CRC, or packet size are foreign words to you, buy this at your own risk. Or actually, do buy it. If you don't know anything about how RS232 comms work, this would be a great learning tool. If it works on ALLEN BRADLEY'S proprietary DF1 protocol (which this thing does not know what that is and nothing else on this planet uses it), then it will work on anything.

### ⭐⭐⭐⭐ Works well. documentation poor
*by D***Y on April 1, 2020*

Does what it says and appears reliable, but the documentation is very poor (come on guys, hire an English tech writer for a week). If you understand how such things work, you can easily overcome the documentation. But if you do not know the basics of serial transfer and TCP/IP - then best to get someone who does to assist you. Solves the problem at less than half to cost of other solutions.

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*Product available on Desertcart United Kingdom*
*Store origin: GB*
*Last updated: 2026-05-31*