• sales

    +86-0755-88291180

Modbus POE ETH Relay Waveshare User Guide

Hardware Connection

  • Connect the Modbus POE ETH Relay to the LAN via a network cable, and supply power through the power port or the POE.


Note: The above figure is powered by a PoE Ethernet port. If it is an ordinary network cable, it must be powered by an external power adapter, which can be powered by an external power supply in the range of 7~36V.

Software Preparation

Waveshare Cloud Configuration

Create Device

Waveshare Cloud provides exclusive device control examples for Modbus POE ETH Relay, and you can start by quickly creating devices.

Quick Start

The platform supports one-click quick start, go to Device Management ->Device List ->One-click Add:


Detailed Steps (Skip to Device Settings for Quick Start)

When creating device properties, you can choose the HEX character type, enter the hex value of the corresponding switch, and select to display the chart


Device Settings

Open VirCom to configure device MQTT connection properties. Please note that if the device has already been configured with some information, it is recommended to load default parameters and restart the device before configuring, for example:




For the modified device, go to Firmware and Configuration



Copy the device subscription address parameters of Waveshare IoT and fill them into the settings, save and download, and wait for a prompt indicating successful transmission


View the TCP connection in Device Management to see if the cloud device is online by displaying established connections


Device Control

Go to the console, view the device, and enter development


Enter the device details page to view the switch-type devices, click the button to set the status of the terminal hardware device


At this time, we check the trigger status of the Modbus PoE ETH Relay relay. Here, CH1 corresponds to relay 0, which is the relay set in the cloud


TAG: ESP32-S3 Development Board 1.47 inch LCD 1.47B Display 1.47inch Screen SD 172×320 RGB LED Raspberry Pi CM5 Compute Module 5 Dual Gigabit Ethernet RJ45 Expansion IO Base Board Raspberry Pi Autofocus Camera Raspberry Pi screen XIAO-nRF52840 Plus 20GPIOs BLE Sense Tiny SuperMini Onboard Mic/Sensor For Arduino For SeeedStudio Raspberry Pi 3.5 inch DSI Display MIPI LCD (H) Capacitive TouchScreen 480x800 ESP32 P4 Development Board 7inch Display 7 inch TouchScreen Onboard ESP32-C6/Camera-Port/Speaker-Port 1.3inch LCD RP2040-PiZero Game ST7789 Raspberry Pi Pico LCD Display Screen Modbus POE ETH Relay Waveshare User Guide Raspberry Pi Mipi Raspberry Pi 1.54inch LCD Bookworm-Desktop Display and Touch Raspberry Pi 5/4B not boot To update BootLoader EEPROM Tutorial ESP32 C3 LCD Development Board 1.3 inch Display Screen ST7789 240x240 3D Transparent Refractive Prism Mini TV For Arduino Electronic EYE 0.71 inch Round Double LCD Display Dual Screen For Arduino Raspberry Pi ESP32 Pico ST Developer Kit spotpear Information ESP32-S3-Zero Spotpear MPW7 Raspberry Pi 5 PCIe to WIFI7 Adapter Board HAT Pi5 For Google TPU BE200 AX210 AI