modbus_rtu_monitor/2ch RS485 Software Configuration.md

RS485 to Ethernet Module - Software Configuration Guide

Overview

This guide covers the essential software configuration of the 2-CH RS485 to Ethernet adapter. Configuration is done via web browser - no software installation required.

What You Need to Configure

Only two things are critical:

1. IP Address - Match your network
2. Baud Rate - Set to 19200 (or match your devices)

All other settings can remain at their defaults.

Quick Start

Default Module Settings

• Channel 1: 192.168.1.200
• Channel 2: 192.168.1.201
• Default Port: 4196
• No password required (first login)

Step 1: Access the Web Interface

1. Temporarily set your computer's IP to 192.168.1.100 (same network as module)
2. Open web browser and go to:
   • Channel 1: http://192.168.1.200
   • Channel 2: http://192.168.1.201
3. Click "Login" (leave password blank on first access)

Step 2: Change IP Address

Network Settings section:

• Device IP: Change to your network (example: 192.168.11.200)
• Subnet Mask: Usually 255.255.255.0
• Gateway: Your router IP (example: 192.168.11.1)
• Leave other settings as default

Important

: Each channel needs a unique IP! Use sequential IPs like .200 and .201

Step 3: Set Baud Rate

Serial Settings section:

• Baud Rate: Set to 19200
• Leave other serial settings as default (8 databits, None parity, 1 stopbit)

Step 4: Save and Repeat

1. Click "Submit Modification"
2. Access the module at its new IP address
3. Repeat Steps 1-4 for Channel 2 with a different IP

Configuration Summary

Essential Settings to Change

Setting	Channel 1	Channel 2
Device IP	192.168.x.200	192.168.x.201
Baud Rate	19200	19200

Other Settings (Keep Defaults)

The web interface shows additional settings that can remain at defaults:

• Work Mode: TCP Server
• Device Port: 4196
• IP mode: Static
• Databits: 8
• Parity: None
• Stopbits: 1
• Flow control: None
• Advanced Settings: Keep defaults
• Multi-Host Settings: Keep defaults

LED Indicators

After configuration, check the module's LEDs:

LED	Expected Status
PWR	Solid (power on)
NET	Blinking (network connected)
LINK1/2	On (RS485 connection)
ACT1/2	Blinking (data transmission)

Troubleshooting

Can't Access Web Interface

1. Verify your computer is on 192.168.1.x network
2. Check Ethernet cable is connected
3. Ensure module is powered (PWR LED lit)
4. Reset if needed: Hold RESET button for 5 seconds (reverts to 192.168.1.254)

Can't Access After Changing IP

1. Update your computer's IP to match the new network
2. Verify gateway and subnet mask are correct
3. If lost, reset module and start over

No RS485 Communication

1. Verify baud rate is set to 19200
2. Check RS485 wiring: A to A (T+), B to B (T-)
3. Ensure RS485 devices are powered

Configuration Checklist

• Accessed Channel 1 web interface (192.168.1.200)
• Changed Channel 1 IP to match my network
• Set Channel 1 baud rate to 19200
• Saved and verified Channel 1 settings
• Accessed Channel 2 web interface (192.168.1.201)
• Changed Channel 2 IP to match my network (unique from Channel 1)
• Set Channel 2 baud rate to 19200
• Saved and verified Channel 2 settings
• Verified LED indicators are working

Example Configuration

Based on network 192.168.11.x:

Channel 1 (http://192.168.11.200):

Device IP:      192.168.11.200
Baud Rate:      19200
Subnet Mask:    255.255.255.0
Gateway:        192.168.11.1

Channel 2 (http://192.168.11.201):

Device IP:      192.168.11.201
Baud Rate:      19200
Subnet Mask:    255.255.255.0
Gateway:        192.168.11.1

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For Additional Help:

• Waveshare Wiki: https://www.waveshare.com/wiki/2-CH_RS485_TO_ETH_(B)
• Support: Contact us for configuration assistance

Last Updated: January 2026