Wave ESP32-S3 8-Channel I/O Controller

The Wave ESP32-S3 8-Channel I/O Controller (ESP32-S3-POE-ETH-8DI-8DO) is an industrial-grade control module designed for AIoT applications requiring reliable multi-interface connectivity. Powered by the dual-core Xtensa 32-bit LX7 processor running at up to 240 MHz, it supports Wi-Fi (2.4 GHz), Bluetooth 5 LE, RS485, CAN, and Ethernet communication with PoE power capability. The board integrates full isolation on its power supply, digital inputs, and outputs, ensuring robust protection against electrical interference for safe, stable performance in demanding environments.



Featuring 8 optically isolated digital inputs and 8 Darlington-transistor-based outputs (up to 500 mA per channel), the controller enables flexible connection with industrial sensors, relays, and switches. Additional features include an onboard W5500 Ethernet chip, RTC clock, TF card slot, buzzer, RGB LED, and comprehensive SDK support for rapid development. With its DIN-rail-mountable ABS enclosure and wide 7 – 36 V power range, the ESP32-S3 I/O Controller delivers a complete, durable, and developer-friendly solution for industrial automation, remote monitoring, and smart control systems.

Quick Spec

• Microcontroller: ESP32-S3 (Xtensa LX7 dual-core 240 MHz)
• Wireless: 2.4 GHz Wi-Fi (802.11 b/g/n), Bluetooth 5 LE
• Inputs: 8 × optically isolated digital inputs (5 – 36 V, NPN/PNP type)
• Outputs: 8 × open-drain Darlington transistor outputs (5 – 40 V, 500 mA max per channel)
• Interfaces: RS485 (isolated), CAN (isolated), Ethernet with PoE (IEEE 802.3af), USB Type-C, TF card slot
• Indicators: RGB LED, Power (PWR), TXD, RXD status LEDs
• Protection: Power, signal and digital isolation with TVS & surge protection
• Additional Features: RTC clock, buzzer, GPIO header access, SDK and Waveshare.Cloud support (MQTT data visualization)
• Power Input: 7 – 36 V screw terminal or 5 V via Type-C
• Dimensions: 175 × 90 × 40 mm (rail-mount enclosure)
• Operating Temperature: –40 °C to +85 °C

Dimensions

Board Layout

1. ESP32-S3-WROOM-1U-N16R8: Adopts ESP32-S3 series chip with Xtensa 32-bit LX7 dual-core processor, built in 16MB Flash and 8MB PSRAM
2. W5500: Extends 10/100 Mbps Ethernet via SPI Interface
3. RESET Button
4. TF Card Slot: Supports external TF card for storing images and files
5. Power Module
6. Bi-directional Optocoupler Isolation
7. CAN Transceiver Chip
8. Onboard TVS (Transient Voltage Suppressor): Effectively suppresses surge voltages and transient spikes in the circuit
9. Optocoupler & Digital Isolation: Prevents interference from external signal
10. RS485 Transceiver Chip
11. Darlington Transistor: sink current up to 500mA, with built-in flyback diode protection
12. Power Isolation: Provides stable isolated voltage, no extra power supply required for the isolated terminal
13. Digital Output Screw Terminals
14. Buzzer
15. TCA9554PWR: I/O expander for controlling digital outputs
16. RTC Battery Holder
17. Power Isolation: Provides stable isolated voltage, no extra power supply required for the isolated terminal
18. Digital Input Screw Terminals
19. Power Supply Screw Terminal: Supports DC 7~36V wide voltage input
20. External Antenna Connector: SMA female connector, for WiFi and Bluetooth wireless communication
21. Ethernet Port
22. PoE Module: for PoE capability, supports IEEE 802.3af standard
23. USB Type-C Port: for module power supply, firmware downloading and USB communication
24. WS2812 RGB LED
25. BOOT Button
26. LED Indicators
• PWR: power indicator
• RXD: RS485 / CAN RX indicator
• TXD: RS485 / CAN TX indicator
27. Pin Header: for connecting other devices
28. USB Type-C Power Output Header: Provides external power supply via USB Type-C port
29. Multi-Function Terminal
30. Voltage Level Selection for Multi-Function Terminal: for switching the communication logic level and output voltage of the multi-function terminal
31. CAN Terminal: for connecting to external CAN devices
32. CAN Matching Resistor: Onboard reserved 120R matching resistor, enabled via jumper
33. RS485 Terminal: for connecting to external RS485 devices
34. RS485 Matching Resistor: Onboard reserved 120R matching resistor, enabled via jumper

Applications

Provides multiple networking demos with waveshare.cloud, using the lightweight MQTT protocol to achieve data visualization service

Resources

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

Shipping List

• 1 x Wave ESP32-S3 8-Channel I/O Controller
• 1 x 2.4G 4DB SMA antenna
• 1 x Screwdriver