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： RS485 to RJ45 Intel BE200 Wireless WLAN Card Gigabit Tri-Band WiFi7 Bluetooth 5.4 M.2 MU-MIMO IEEE 802.11 LuckFox Pico Mini 8inch LCD 1280x800 Computer PC Monitor Display Secondary Screen TypeC USB CPU RAM 7inch-USB-Monitor user guide Raspberry Pi Triple Screen HAT ESP32 S3 AI 4.3inch (C) Industrial Development Board 4.3 inch TouchScreen Display Sensor CAN I2C RS485 DeepSeek Raspberry Pi 5 PCIe to M.2 ESP32-S3N8R8 7inch LCD Display TouchScreen 800&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;times;480 WiFi Bluetooth CAN RS485 Sensor ESP32 ST7789 tutorial SpotPear Raspberry Pi 5 inch DSI MIPI Display LCD (D) Capacitive TouchScreen 720x1280 Python HTTP Request Communication RV1103 0.85inch Display Raspberry Pi 5 Speaker ESP32 1.44inch LCD ESP32-S3-Zero Raspberry Pi 5 PD Trigger Raspberry Pi

RS485 Control Tutorial

RS485 Control

Hardware Connection

Software Operation

Raspberry Pi 11.9inch Capacitive Touch Screen LCD compatible with HDMI