• 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: UGV Beast PT Kit AI OpenCV Robot Car MediaPipe For Jetson Orin Raspberry Pi Pico Display Core3566004000 RS485 to Ethernet Serial Bus Servo ESP32-S3 Development Board 4 inch LCD TouchScreen Display 480x480 RS485 /SHT20 /Relay For Arduino LVGL 86 TVbox Serial UART Bus Servo CF35-12 TTL 35KG.CM Magnetic-Encoder High precision and Large torque Arducam Wiki Raspberry Pi 5 Cooling ESP32-S3 Development Board 1.85 inch Round LCD N16R8 DeepSeek AI Voice Chat Robot BOX Magnetic-charging ESP32 S3 LCD Camera Development Board 2 inch Display QMI8658 Sensor / Battery Port LVGL/HMI For Arduino Raspberry Pi 5 RTC Box TVOC Sensor gas Sensor Expansion board UART High Sensitivity For Arduino /Raspberry Pi /Pico /ESP32 Raspberry Pi 8.8 inch DSI MIPI Display LCD Capacitive TouchScreen 480x1920 Raspberry Pi 5/4B easy Adapter Micro HDMI to HDMI 4K All Ports To Pi's USB Side SpotPear AV to LVDS SpotPear Ranging Sensor