Wave 6-Channel ESP32-S3 WiFi Relay Module

The Wave 6-Channel ESP32-S3 WiFi Relay Module is an industrial-grade solution designed for robust wireless and RS485 control of devices. Featuring the powerful ESP32-S3 microcontroller with a 240 MHz dual-core processor, it supports 2.4 GHz WiFi and Bluetooth LE communication. This module is ideal for managing up to six relays, capable of handling 10A at 250VAC/30VDC, making it suitable for industrial and smart home applications.



Built with multiple protection circuits, including optocoupler isolation, power isolation, and TVS diodes, the module ensures reliable operation in high-interference environments. Its RS485 interface supports Modbus communication for industrial sensors or devices. The onboard 40-pin header is compatible with Raspberry Pi Pico HATs for easy function expansion, such as RTC, LoRa, or CAN. Enclosed in a rail-mount ABS case, it offers easy installation and enhanced safety for industrial-grade use.

Quick Spec

• Microcontroller: ESP32-S3, Xtensa 32-bit LX7 dual-core processor (240 MHz)
• Wireless Communication: 2.4 GHz WiFi (802.11 b/g/n), Bluetooth 5, BLE
• Relay Channels: 6 channels (1NO 1NC), ≤10A 250VAC/30VDC
• Power Input: 7~36V screw terminal or 5V via USB Type-C
• RS485 Interface: Isolated, surge protection, ESD protection, 120R matching resistor (jumper-configurable)
• Expandable Interface: 40-pin Raspberry Pi Pico HAT compatible header
• Indicators: RGB LED (programmable), Power (red), RS485 TX (green), RX (blue)
• Protection: Optocoupler isolation, digital isolation, power isolation, TVS diodes
• Operating Voltage: 7~36V or 5V/1A via Type-C
• Communication Protocol: USB, RS485
• Enclosure: ABS, rail-mount
• Dimensions: 145 x 90 x 30mm

Dimensions

Interface & Pinout

Layout

1. ESP32-S3: up to 240MHz operating frequency, with 2.4GHz WiFi and BLE
2. 6-channel relays: contact rating per channel: ≤10A 250V AC or ≤10A 30V DC
3. Optocoupler isolation: prevents interference from external high-voltage circuit connected to the relay
4. Digital isolation: prevents interference from external signal
5. Power supply isolation: provides stable isolated voltage, needs no extra power supply for the isolated terminal
6. TVS diode: effectively suppresses surge voltage and transient spike voltage in the circuit
7. Ceramic gas discharge tube
8. Relay screw terminals: for connecting with user devices
9. 40PIN Raspberry Pi Pico HAT header
10. RS485 bus interface: for connecting to external RS485 devices
11. Power supply screw terminal: Supports DC 7~36V wide voltage input
12. LED indicators
    PWR: power indicator
    RXD: RS485 RX indicator
    TXD: RS485 TX indicator
13. WS2812 RGB LED: controllable via GPIO38
14. USB Type-C connector: for module power supply, firmware downloading and USB communication
15. Passive buzzer: sound frequency is controllable via GPIO21
16. ESP32 RESET button
17. ESP32 BOOT button
18. External antenna connector: SMA female connector, for WiFi and Bluetooth wireless communication
19. RS485 matching resistor jumper: Onboard reserved 120R matching resistor, enabled via jumper
20. Relays default control pin setting

Wiring Diagram

Resources

• Product Page
• Product Wiki
• Schematic
• ESP32-S3 Datasheet
• Demo

Shipping List

• 1 x Wave 6-Channel ESP32-S3 WiFi Relay Module
• 1 x 2.4G 4DB SMA antenna
• 1 x Screwdriver