W5500 mini - miniature Ethernet module with W5500 chip

Expansion board based on the Wiznet W5200 Ethernet system. It allows you to easily connect Arduino to an Ethernet network. DFRobot DFR0125

RS232 RS485 to RJ45 Ethernet Serial Server, RS232 And RS485 Dual Channels Independent Operation, Dual Ethernet Ports, Rail-mount Industrial Isolated Serial Module, Bi-directional Transparent Transmission. RS232 RS485 TO ETH (B)

Compact mini router with two Gigabit Ethernet ports, equipped with a quad-core RK3528 ARM Cortex-A53 processor clocked at 1.5 GHz, which provides fast and stable network connections. The router offers 4 GB of LPDDR4 memory, 8 GB of built-in eMMC memory expandable up to 512 GB, and support for Type-C power supply in the range of 5V-12V, making it a flexible and efficient network solution. Seeed Studio 113991235

3xUART - Ethernet converter enabling two-way communication between devices equipped with UART TTL ports and the Ethernet network. It is visible in the system as a virtual COM port and configured via the website or using AT commands. USR-TCP232-ED2

Industrial RS232/485 converter for Ethernet and WiFi. It is mounted on a DIN rail. Supports Modbus and MQTT protocols. Waveshare RS232 RS485 TO ETH (B)

UART - Ethernet converter enabling two-way communication between devices equipped with UART TTL ports and the Ethernet network. It is visible in the system as a virtual COM port and configured via the website. USR-K7

A set with the Quectel RM520N-GL module designed to connect 5G communication via an Ethernet or USB3.1 connector. It supports 5G SA or NSA networks and is backwards compatible with 4G and 3G networks. Waveshare RM520N-GL 5G M.2 TO ETH (EU)

Ethernet transceiver module based on LAN8720 chip. It communicates via the RMII interface. Waveshare LAN8720 ETH Board

DS100R - RS232 Ethernet 10BaseT converter module

USR-SF1005 is a 5-port unmanaged Ethernet switch supporting 10/100 Mbps speed, ideal for reliable data transmission in small office and home networks. With store-and-forward technology and metal housing, it provides optimal data flow, protection against electromagnetic interference and simple plug-and-play installation

The USR-IO0440 is an additional input/output module specifically designed to work with USR-M100 and USR-M300 modules. This module allows the system to be expanded with additional analog and digital ports, providing even greater flexibility in managing and controlling devices in industrial applications. With its robust construction and ease of integration, the USR-IO0440 is an excellent complement to the USR-M100 and USR-M300 gateways, enhancing their monitoring and control capabilities. USR-IO0440 

Gigabit Ethernet expansion module with RTL8211E-VB chip (integrated Realtek Ethernet transceiver). It complies with 10BASE-T, 100BASE-TX and 1000Base-T IEEE 802.3 standards. Numato Lab ETHEXPGB001

The Tibbo RJ203+EM1206-1024K-01 module is a versatile solution for integrating network communication in IoT applications, supporting Ethernet and WiFi. Equipped with 1024 KB flash memory and 2 serial ports, it supports multiple network protocols, offering easy assembly thanks to the THT design.

UART - Ethernet converter enabling two-way communication between devices equipped with UART TTL ports and the Ethernet network. It is visible in the system as a virtual COM port and configured via the website. USR-K3

RS485-Ethernet converter that provides easy communication between RS485 interface and Ethernet network via RJ45 connector. Industrial DIN rail mounting hardware included. Elfin-EE11A

A converter that ensures easy communication between the RS232/RS485/RS422 interface and RJ45 Ethernet. It supports popular network protocols, including IP, TCP, UDP, DHCP, DNS, HTTP, ARP, ICMP, Websocket and HTTP client, as well as Modbus RTU and Modbus TCP protocols. USR-N540