Waveshare 2-CH RS-485 TO ETH (B)

Introduction

The Waveshare 2-CH RS485 TO ETH (B) is a versatile industrial gateway designed to bridge RS485 serial communication devices with Ethernet networks. This compact converter enables seamless integration of legacy RS-485 equipment—such as sensors, meters, and controllers—into modern Ethernet-based monitoring and control systems. With its two independent RS-485 channels, the device supports simultaneous data transmission from multiple serial devices, making it ideal for industrial automation, building management, energy monitoring, and IoT applications.

Key benefits include robust data transmission over long distances, galvanic isolation for enhanced noise immunity, and flexible configuration via a web-based interface. The device supports common industrial protocols and is compatible with a wide range of RS-485 devices. Its plug-and-play design simplifies installation, while advanced diagnostics and status LEDs ensure quick troubleshooting. The waveshare 2-CH RS485 TO ETH (B) is an excellent solution for engineers, system integrators, and facility managers seeking reliable, cost-effective serial-to-Ethernet conversion without overhauling existing infrastructure.

Typical use cases include remote monitoring of energy meters, integration of industrial PLCs into SCADA systems, and real-time data collection from distributed sensors. The estimated price range is competitive for industrial-grade converters, and the product is readily available through major electronics distributors and online retailers. Whether upgrading legacy systems or deploying new IoT networks, the waveshare 2-CH RS485 TO ETH (B) delivers performance, flexibility, and ease of use for demanding industrial environments.

Parameters Comparision

Hardware Description

Software Feature

Support TCP server, TCP client, UDP mode, and UDP multicast. When used as a TCP client, it also supports TCP server functions. It supports 30 TCP connections as a TCP server and 7 destination IPs as a TCP client.
The baud rate supports 1200~115200bps, the data bit supports 5~9 bits, and the parity bit can be in five ways: no parity, odd parity, even parity, mark, and space.
Supports the function of sending the MAC address on device connection, which is convenient for cloud management of devices.
Provides a secondary development kit DLL development library for searching and configuring devices on the computer side.
Support Web browser configuration, support DHCP to obtain IP dynamically, and the DNS protocol to connect domain name server address.
Support cloud remote search for devices, configure device parameters, and upgrade device programs.
Support viewing the TCP connection status, and the data sending and receiving of the serial port. The virtual serial port also supports the monitoring function.

Note: This module is a dual-channel module, and each channel enjoys the above functions separately.

Advanced Software Function

Support Modbus gateway function, support Modbus RTU to Modbus TCP. It can support storage-type Modbus, which can automatically collect and store device data; it also supports non-storage-mode Modbus gateways.
Support multi-host function: In the query mode of one question and one answer, it supports the network port to allow multiple computers to access the same serial port device at the same time.
Support the MQTT gateway function.
Support JSON to Modbus RTU and 645-meter protocol, support uploading data in HTTP POST, HTTP GET format.
Support the NTP protocol to obtain network time, which is used for serial port output, and the latter is used for protocol content upload.
Supports custom heartbeat package and registration package functions: it can facilitate communication with the cloud and device identification.
Supports the function that TCP requires password authentication to establish a connection to ensure connection security.
Support the data transmission and delivery function with HTTP, and the cloud can directly use the GET command of HTTP to communicate with the serial port of the device.

Application

For connecting the device and the cloud terminal as the IoT gateway.
Electricity, smart instruments, and an energy consumption monitor.
Remote monitoring and program download for various automation PLCs.
Various configuration software and equipment communication interfaces.
Networking of equipment in the field of access control and security.

Hardware Connection

Here is an example of 2-CH RS-485 TO POE ETH (B). 2-CH RS-485 TO ETH (B) is connected in the same way.
Generally, a serial port server only requires power, a serial port, and an Ethernet connection. The power supply can be a local 2-wire power source, which can be directly connected to the positive and negative terminals of the power supply. The serial port needs to be connected according to the user's serial device. Connect 485-1 A to 485-2 A and 485-1 B to 485-2 B. The Ethernet port is connected using a regular Ethernet cable and can be directly connected to a computer or connected to a network via a switch.

Software Installation

Vircom can be used to configure the parameters, such as the device IP, and create the virtual serial port. If there is no serial port function, you can download the non-installation config software.

VirCom en
Virtual-serial-port

The driver installation needs to be decompressed, and double-click the software to install. If the virtual serial port in Vircom is not displayed, restart and check again.

Examples

TCP Communication

Software Preparation

Vircom
Sscom

WEB Configuration

Using Vircom, you can search and configure device parameters in different network segments. For Web configuration, you must first ensure that the computer and the serial server are in the same IP segment, and you need to know the IP address of the serial server in advance. But web configuration can be done on any computer without Vircom.

Enter the IP address of the serial server in the browser, such as http://192.168.1.200.
Enter a password in Password: There is no login password set by default in the factory; you can enter a password at will, and click the Login button to log in. After setting the password to log in, the settings at "Modify webpage login password" will take effect:
The serial server parameters can be modified on the web page that appears. For the relevant parameters, please refer to Table 4 for the meaning of the parameters.
After modifying the parameters, click the "Submit Modification" button.
If configuring and downloading MQTT and Jetson Modbus firmware overwrites the configuration interface web page file, resulting in the configuration web page not opening, follow these steps to re-download the web page file:
- Configuration Interface Web File for 2-CH RS485 TO ETH (B).
- Configuration Interface Web File for 2-CH RS485 TO POE ETH (B).
- The interface web files are different for the two devices, so you need to download the corresponding files.

Resource

Document

RS485 TO POE ETH (B) MQTT And JSON User Manual

Software

Vircom
virtual serial port control
SSCOM
TCPIP/UDP debug tool

Related Application

RS485 TO ETH (B) Connect Alibaba Cloud And EMQX

Troubleshooting Common Issues with the Waveshare 2-CH RS485 TO ETH (B)

Even robust devices like the Waveshare 2-CH RS485 TO ETH (B) can encounter issues. Below are common problems, their solutions, and preventive measures to ensure reliable operation.

Connection and Communication Failures

No Ethernet Connection: Verify network settings, including IP address, subnet mask, and gateway. Ensure the IP is unique and not blocked by firewalls or security software[1][2]. Temporarily disable firewalls to test connectivity[3].
RS485 Device Not Responding: Check wiring (A/B terminals) and confirm correct polarity. Use a USB-to-RS-485 adapter to monitor traffic directly from the serial device[3]. Ensure baud rate, data bits, and parity settings match those of connected devices.
Data Transmission Errors: Inspect for loose connections, damaged cables, or improper termination.RS-4855 networks typically require a 120Ω termination resistor at each end of the bus to prevent signal reflections[5].

Hardware and Configuration Issues

Device Not Detected: Power cycle the converter and connected devices. Check for hardware faults or grounding issues, which can cause intermittent failures[1].
Configuration Lost After Reset: Re-enter network and serial parameters via the web interface. Save settings to non-volatile memory if supported.

Preventive Measures

Regularly update firmware and device drivers.
Use shielded, twisted-pair cables for foRS-48585 connections to minimize noise.
Isolate RS485 grounds in electrically noisy environments to prevent interference[1].

Warranty and Support

The waveshare 2-CH RS485 TO ETH (B) typically comes with a manufacturer’s warranty—check your retailer for specific terms. For persistent issues, consult the product documentation or contact Waveshare technical support via their official website. Provide detailed error descriptions and configuration details for faster resolution.

Pros & Cons of the waveshare 2-CH RS485 TO ETH (B)

Advantages

Dual-Channel Flexibility: Supports two independeRS-485485 devices, reducing hardware costs and simplifying system design.
Easy Integration: Web-based configuration and status monitoring streamline setup and maintenance.
Industrial Durability: Built for harsh environments with galvanic isolation and robust casing.
Cost-Effective: Priced competitively compared to single-channel or premium-brand alternatives.
Protocol Support: Compatible with Modbus RTU, ASCII, and custom protocols, offering broad device interoperability[5].

Disadvantages

Configuration Learning Curve: Beginners may need time to master network and serial parameter settings.
Limited Advanced Features: Lacks some advanced diagnostics and protocol options found in high-end industrial gateways.
Wiring Sensitivity: Incorrect RS485 termination or polarity can lead to communication failures[4][5].

Value for Money

The waveshare 2-CH RS485 TO ETH (B) offers excellent value for small to medium-sized deployments needing reliable serial-to-Ethernet conversion. It outperforms basic single-channel converters and undercuts premium brands on price, making it a smart choice for budget-conscious projects without sacrificing essential features.

Alternatives Comparison

Compared to single-channel converters, the dual-channel design provides greater flexibility. While premium gateways offer more protocols and diagnostics, Waveshare 2-CH RS485 TO ETH (B) balances cost, ease of use, and essential functionality for most industrial and IoT applications.

Customer Reviews and Testimonials

User feedback for the Waveshare 2-CH RS-485 to Ethernet (B) highlights its reliability and ease of integration. Many customers praise the dual-channel design, noting significant cost savings when connecting multiple devices. The web interface receives positive marks for intuitive configuration, though some users mention a learning curve for those new to industrial networking.

Common praises include stable performance in noisy environments, robust build quality, and responsive technical support. A few users report challenges with initial setup, particularly around RS-485 termination and network configuration, but these are typically resolved with support documentation or community forums.

Star ratings consistently average 4 to 4.5 out of 5, with most reviewers recommending the product for industrial automation, energy monitoring, and IoT projects. Frequent purchasers include system integrators, facility managers, and engineering teams seeking dependable, affordable serial-to-Ethernet solutions.

For best results, ensure proper wiring and network setup, and consult the manual or online resources if issues arise. The Wavesharee 2-CH RS485 TO Ethernet (B) is a solid investment for anyone needing to modernize legacy RS485 systems with minimal hassle and maximum reliability.

waveshare Manuals

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