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This is a RS485 device data acquisitor / IoT gateway designed for industrial environment. It combines multi functions in one, including serial server, Modbus gateway, MQTT gateway, RS485 to JSON, etc. The module features RS485 and Ethernet ports, uses screw terminals for power input, supports 9~24V wide range power supply. Rail-mount flame-retardant case design, small in size, easy to install.
It is suitable for applications like data acquisition, IoT gateway, safety & security IoT, and intelligent instrument monitoring.etc.
Specifications
1.Primary Introduction
Product Type--- Serial server, Modbus Gateway, MQTT Gateway
Basic Function--- Bi-directional transparent data transmission between RS485 and Ethernet
Communication interface --- RS485 port x 1, Ethernet port x 1
Power supply --- 9 ~ 24V DC screw terminal
2.Communication
Ethernet--- common network port, 10 / 100M auto-negotiation RJ45 connector, 2 KV surge protection.
Serial port--- RS485.
3.Serial specification
Baudrate---300 ~ 115200 bps
Parity bit--- none, odd, even, mark, space
Data bit--- 5 ~ 9 bits
4.Software
Protocol--- ETHERNET, IP, TCP, UDP, HTTP, ARP, ICMP, DHCP, DNS
Configuration--- host, web browser, device management functions library
Communication method--- TCP/IP direct communication, VCOM
Operating mode--- TCP server, TCP client (coexisting with TCP server), UDP, UDP multicas
5.Environment requirement
Operating temperature--- -40℃ ~ 85℃
Storage temperature: -45℃ ~ 125℃
Humidity range--- 5% ~ 95% relative humidity
Dimensions --- L x W x H--- 87x 36 x 59 mm
Online Document/How to use: //bit.ly/3rWrjyz
Package Content
RS485 TO ETH (B) x1
Anthony
Reviewed in the United States on March 18, 2025
Works great. The web UI is good, so dip switches are required to change baud rate, and you can do all sorts of configuration with the config page. The default addr is 192.168.1.254, it was unfortunate the same as my gateway, so I had to hard wire to it to change the IP address. Other than that, it is very easy to use. I hooked up a thermostat and humidity sensor to it and created an IOT app.
Av1
Reviewed in the United States on March 18, 2025
Allows comms in one direction, no issue.
Yury Sannikov
Reviewed in the United States on February 24, 2024
I'm working on a personal project with the Modbus functionality. The device I'm working on was tested with the Serial to RS485 dongle and working fine.I added the RS485 to the RJ45 Ethernet Module (waveshare), enabled the Modbus TCP to RTU mode, set the device address, and sent the following command:`modbus 192.168.6.35:2020 -s213 h@13`The "waveshare" is able to transmit data to my device, and my device successfully processes the command responding with the correct Modbus response:[23:50:09][D][uart_debug:114]: [23:50:09][D][uart_debug:114]: >>> D5:03:02:08:27:CF:8CHowever, the "waveshare" device, seems, to either have a defective RX port or can not transmit the response back. I tried modbus_cli and ModbusMechanics. Both fail with the "waveshare" device but work with the USB458 dongle.*Correction*: Looks like it was a subtle bug with the particular Modbus library on my device and/or the device(s). Even though the USB dongle works correctly, another device from a different vendor behaves the same way. Setting 2 stop bits helped. I assume the "waveshare" device would work perfectly with this setup. Sorry for the initial negative review.
Ammunist
Reviewed in the United States on July 10, 2023
For the price, it is amazing. Works great and reliably.
Don McIntyre
Reviewed in the United States on October 16, 2023
Works very well. The web GUI is very nice to deal with. The terminals unplug so that's handy. Ethernet running at 10meg.
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