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PCBA module E45 RS485 RS232 serial to Ethernet TCP/IP model USR-TCP232-4

Product ID UK31

Technical summary

  • New Cortex-M3 core.
  • LWIP optimization protocols.
  • Auto-MDI/MDIX function.
  • Support TCP server, TCP client, UDP, UDP server, httpd.
  • Virtual serial port support, with the appropriate software.
More info


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Product available. Delivery time 1-3 days. 2 years warranty. 14 days return period.
  • Description
  • Sizes
  • Related
  • Tech FAQs

USR-TCP232-4 is an RS232 RS232 to RJ45 TCP/IP ethernet converter module. Support firmware update through network, IP support and domain name, support up to 4 link from client when acting as TCP server, send and receive data with the ID. Possibility of modifying the MAC address, and the port of the HTTP server. Keepalive support. It has been widely used in the IOT field. Low cost and high stability module.


  • New Cortex-M3 core.
  • LWIP optimization protocols.
  • Auto-MDI/MIDX function.
  • Support of TCP server, TCP client, UDP, UDP server, HTTPD.
  • Virtual serial port support, with the appropriate software.
  • Serial port speed: 110 bps at 1,024,000 bps (COM0 only 256,000 bps max).
  • DHCP support automatically accesses IP.
  • You can check the installation within the network through the UDP broadcast protocol.
  • Protocol for VIP clients.
  • PC TCP/IP programming through VB, C ++, Delphi, Android, iOS.
  • Configuration of parameters through WEB.
  • Communication through UDP.
  • Push button of default configuration.
  • Isolation 2 KV.
  • Firmware update support throughs network.
  • Support for IP operations and domains at the same time.
  • Supports up to 4 link from client when acting as TCP server.
  • The MAC address can be modified.
  • You can modify the HTTP server port for the integrated HTTP server module.
  • Keepalive support.


Weight: 0.05 Kg.
Product measures:
Width: 10.5 x Depth: 5.2 x Height: 1.8 cm.
Number of packages: 1
Package sizes:
10.5 x 5.2 x 1.8 cm.Package volume: 98.280 cm3.
This product is not available with different sizes
Color unspecified

[!] Weights, sizes, colors and shapes are only approximate and may differ from those represented, although the functionality of the product never differ with those specified

Tech FAQs

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Technical terms used
  1. Android - IOS

  2. Categories network cables

  3. DHCP

  4. Communication Series

  5. RJ45

Android - IOS

Android Android is a kernel-based Linux operating system designed primarily for touch screen mobile devices such as smartphones or tablets, initially developed by Android, Google Inc. supported financially and later bought the company in 2005. IOS is a mobile operating system of Apple Inc. Originally developed for iPhone (iPhone OS), beingthen used in devices like the iPod Touch, iPad and Apple TV. Apple, Inc. does not allow the installation of third-party iOS hardware.

Fuente de la información sobre Android:

Categories network cables

Depending on the quality and type, network cables are classified into categories that help us know the characteristics of them.

The categories of network cables most commonly used are:

- Category 5
- Category 5e
- Category 6
- Category 6
- Category 7

As can be seen, category 5e (enhanced or improved) and category 6A (Augmented), are an improvement of categories 5and 6, respectively, which it has improved the top speed and bandwidth.

The higher the category, the higher the speed of maximum data, the maximum 100 meters distance as its standard.

You can see a table which shows the 5 categories, where V is the maximum velocity, D is the maximum and MHz frequency which can work away.

Categories network cables


(DHCP stands for Dynamic Host Configuration Protocol, in Spanish "protocol Dynamic Host Configuration") is a network protocol that allows clients to obtain an IP network configuration parameters automatically. It is a protocol for client/server where a server usually has a list of dynamic IP addresses and will allocate these customers as they are left freeKnowing at all times who has been in possession of that IP, how long it has had and who has been assigned later.

Fuente de la información sobre DHCP:

Communication Series

RS-232 (Recommended Standard 232, also known as EIA/TIA RS-232C) is an interface that designates a standard for the exchange of a series of binary data between a DTE (Data Terminal Equipment) and DCE (Data Communication Equipment , Data Communication Equipment), although there are others in which the RS-232 interface is also used. An equivalent definition published by the ITU is called V.24. The RS-232 is a connectorDB-25 type (25-pin), although it is normal to find the version of 9-pin (DE-9, or popularly also called DB-9), cheaper and even extended to certain types of peripherals (such as serial mouse PC).

Communication Series

Fuente de la información sobre rs232:


When we talk about RJ45 ("Registered Jack" 45) we refer to a telecommunications network interface for wired connection of voice and data equipment.

This connector has 8 pins or connections and may have a specific category depending on the data transfer speed and bandwidth (category 5e, 6, etc.)

The common application is their use in Ethernet network cables under TIA/EIA-568-B standard that defines the arrangement of pins (pinout), but can also be used for other applications.

- Direct pin diagram:

Pin No.2: GREEN
Pin No.4: BLUE
Pin No.6: ORANGE
Pin No.8: BROWN

Pin No.2: ORANGE
Pin No.4: BLUE
Pin No.6: GREEN
Pin No.8: BROWN

- Schematic of crossed pins:

The crossover cable has one end with EIA-568A scheme and the other one with EIA-568B.


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