Industrial 6-Ch Relay Module - WiFi/Bluetooth/RS485

Features at a glance

• Based on ESP32-S3 microcontroller with Xtensa 32-bit LX7 dual-core processor, capable of running at 240 MHz
• Integrated 2.4GHz Wi-Fi and Bluetooth LE dual-mode wireless communication, with superior RF performance
• High quality relay, contact rating: ≤10A 250VAC/30VDC
• Onboard isolated RS485 interface, for connecting to various RS485 Modbus industrial modules or sensors
• Onboard 40PIN header compatible with some Raspberry Pi Pico HAT, for expanding more functions such as RTC / CAN / RS232 / LoRa / sensor, etc.
• Onboard USB Type-C port for power supply, firmware downloading and debugging
• Onboard power supply screw terminal, supports 7~36V wide voltage input, suitable for industrial applications
• Onboard optocoupler isolation to prevent interference from external high-voltage circuit connected to the relay
• Onboard digital isolation to prevent interference from external signal
• Onboard unibody power supply isolation, providing stable isolated voltage, no extra power supply required for the isolated terminal
• Built in buzzer, RGB colorful LED, power supply and RS485 TX/RX indicators for monitoring the operating status of the module
• Rail-mounted ABS case, easy to install, safe to use
• Provides multiple networking demos with waveshare.cloud, using the lightweight MQTT protocol to achieve data visualization service

What's on board

1. ESP32-S3, up to 240MHz operating frequency, with 2.4GHz WiFi and BLE
2. 6-channel quality 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, RXD, TXD
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

Package contents

1. ESP32-S3-Relay-6CH ×1
2. 2.4G 4DB SMA antenna ×1
3. Screwdriver ×1