RS485 to WiFi/Ethernet Module (Modbus/MQTT Gateway)

WaveshareSKU: WAV-21968
Sale price £31.90
incl. VAT
excl. VAT
In stock

Awesome Extras

DINrPlateDINrPlate 2 - Raspberry Pi DIN Rail Mount
Sale price £12 incl. VAT excl. VAT
WaveshareRS485 to RJ45 Ethernet Module
Sale price £21.60 incl. VAT excl. VAT
ModMyPiRJ45 Cat5e Ethernet LAN Cable 2m (Black)
Sale price £1.50 incl. VAT excl. VAT

This RS485 device data acquisitor / IoT gateway is designed for an industrial environment. It combines multiple functions in one, including serial server, Modbus gateway, MQTT gateway and RS485 to HTTPD Client.

With RS485, WiFi and Ethernet ports, the module has functions such as serial to WiFi, serial to Ethernet, Ethernet to WiFi and many others. With screw terminals for power input, it supports a 5~36V power supply. It is suitable for applications like data acquisition, IoT gateway, safety & security IoT, and intelligent instrument monitoring. With Industrial DIN Rail Mount Support, it is easy to install, has a compact size, and is cost-effective.

A power supply is not included however we stock the recommended 12V 2A DIN-rail PSU here.


  • Rail-Mount Serial Server, RS485 to WiFi/Ethernet Module, Modbus MQTT Gateway
  • Offers an RS485 device data acquisitor / IoT gateway
  • Designed for industrial environment
  • Socket Distribution Protocol: In the transparent transmission mode, the serial device can send data to the specified socket link; the network data of each Socket is sent to the serial device through the serial port.
  • Multi Configuration Methods: supports multi-configuration methods such as hosts, web browsers and serial port configuration
  • Hardware Protection: ESD Level 4 Static Protection, Level 3 Surge Protection and EFT Level 3 Electrical Fast Transient/Burst Protection
  • Suitable for applications like data acquisition and IoT gateway
  • Power Supply: 5 ~ 36 V DC
  • DIN Rail Mount for easy installation

What's On Board


Communication interface RS485, screw terminal
Power supply 5 ~ 36V DC, screw terminal
Case PC + ABS, V0 flame retardant grade
Dimensions L × W × H: 109.66 × 28 × 64.71 mm
Ethernet 10 / 100M auto-negotiation RJ45 connector
WIFI 802.11b/g/n compliant
Serial port RS485 interface (Anti-surge, Lightningproof, Over-current protection)
Frequency Band 2.412 ~ 2.484 GHz
Wireless network Station / AP / AP+Station Mode
Security mechanism WPA-PSK / WPA2-PSK
Encryption type TKIP / AES
Transmitting power 802.11b: +19dBm (Max.@11Mbps)
802.11g: +18dBm (Max.@54Mbps)
802.11n: +17dBm (Max.@HT20, MCS7); +17dBm (Max.@HT40, MCS7)
Receiving sensitivity 802.11b: -89dBm (@11Mbps)
802.11g: -81dBm (@54Mbps)
802.11n: -73dBm (@HT20, MCS7); -71dBm (@HT40, MCS7)
Baud rate 300 ~ 460800 bps
Parity bit none, odd, even, mark, space
Data bit 5 ~ 9 bits
Flow control N/A
Protocol TCP / UDP / ARP / ICMP / DHCP / DNS / HTTP / MQTT
Configuration host, web browser, serial AT command
Communication method TCP/IP direct communication, VCOM
Operating mode Transparent transmission, serial command, HTTPD Client, Modbus TCP to Modbus RTU
Operating temperature -40℃ ~ 85℃
Storage temperature -45℃ ~ 125℃
Humidity range 5% ~ 95% relative humidity


Package Contents

  • 1x RS485 TO WiFi/ETH
  • 1x Antenna 

Power supply not included (this model is recommended)

Payment & Accreditations

Payment methods
Visa Mastercard Maestro PayPal Amazon Klarna

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.