RS485 Control

Connect the ESP32-S3-ETH-8DI-8RO device using RS485, and send data to ESP32-S3-ETH-8DI-8RO to control the opening and closing of each relay. Communication is performed at a default baud rate of 9600.

Operation Command	Command Function
06 05 00 01 55 00 A2 ED	Switch the state of CH1 relay
06 05 00 02 55 00 52 ED	Switch the state of CH2 relay
06 05 00 03 55 00 03 2D	Switch the state of CH3 relay
06 05 00 04 55 00 B2 EC	Switch the state of CH4 relay
06 05 00 05 55 00 E3 2C	Switch the state of CH5 relay
06 05 00 06 55 00 13 2C	Switch the state of CH6 relay
06 05 00 07 55 00 42 EC	Switch the state of CH7 relay
06 05 00 08 55 00 72 EF	Switch the state of CH8 relay
06 05 00 FF FF 00 BD BD	Turn on all relays
06 05 00 FF 00 00 FC 4D	Turn off all relays

Hardware Connection

Here we use the example of USB TO RS232/485 Converter for demonstration

ESP32-S3-Relay-6CH	USB-TO-RS232-485
RS485 - A+	Tx B - A+
RS485 - B-	Rx B - B-

Software Operation

Use SSCOM to send data
Open the SSCOM software and select the COM port corresponding to the Port B connected above
Open the serial port and use the Send Multi Char function to quickly send commands

You can control the relays with the following commands

TAG： RS232 to CAN Raspberry Pi Pico 2 RP2350 ETH CH9120 TCP/UDP Ethernet Network For Arduino Pi5 Industrial Modbus POE ETH RJ45 To 8-Ch Relay B RTU/Modbus TCP-Ethernet For IOT lilygo 0.85inch Display Raspberry Pi 8 inch DSI LCD Display With 5MP Front Camera MIPI 800×480 Capacitive TouchScreen ESP32 Display RS232/485/422 To CAN Industrial USB TO RS232/485 Serial UART Converter FT232RNL Compact Size Raspberry Pi CM5 Compute Module 5 Dual Gigabit Ethernet RJ45 Expansion IO Base Board JETSON-IO-BASE-A user Guid 3D Display ESP32-S3 Industrial-Grade IOT RS485 CAN Communicator WiFi Bluetooth Rounded LCD Raspberry Pi 14 inch LCD 2K HDMI /Type C Display Capacitive TouchScreen 2160x1440 For Jetson Nano/mini Computer PC RV1106 SC3336 Desktop Raspberry Pi5 PCIe TO M.2 MINI Support Gen2 and Gen3 SSD Compatible 2230 2242 Milk V Duo IO Board Tutorial

RS485 Control Tutorial

RS485 Control

Hardware Connection

Software Operation

Raspberry Pi 5 10.1 inch DSI LCD Captive TouchScreen MIPI Display 1280x800 Industrial One-Body Tablet PC With 5MP Front Camera