Industrial 8-Channel ESP32-S3 POE WiFi Relay Module with Isolated CAN & Dual-Core Processor

This high-performance industrial-grade relay module is built on the ESP32-S3 platform, featuring a Xtensa® 32-bit LX7 dual-core processor running at up to 240MHz. Designed for robust automation, monitoring, and control tasks, it supports WiFi and Bluetooth, offering versatile connectivity for modern industrial applications.

🔧 Key Features:

• 8 Relay Channels
  Reliable switching for motors, pumps, lights, and other industrial loads.

• Isolated CAN Interface
  Enables high-reliability communication in noisy industrial environments.
  The Controller Area Network (CAN) interface supports multi-master, real-time communication between multiple devices over a single bus, making it ideal for automotive, factory automation, and smart energy systems.
  The isolation circuitry protects both the module and connected systems from voltage surges and noise.

• Power over Ethernet (PoE)
  Supports simplified power and data delivery over a single Ethernet cable (requires compatible PoE injector/switch), ideal for distributed IoT deployments.

• Digital Input Terminals
  Accepts external signals from buttons, sensors, or switches to trigger events or monitor system states.

• Onboard Ethernet Port
  Offers reliable wired network communication, suitable for fixed installations.

• Multiple Isolation Protections
  Features both power isolation and optocoupler isolation, ensuring system safety, stability, and long-term durability, even in high-interference environments.

📡 Connectivity:

• WiFi + Bluetooth LE for wireless control and monitoring

• Ethernet + PoE for wired and remote installations

• CAN Bus for robust device-to-device communication

🧠 Ideal For:

• Industrial automation

• Smart energy systems

• Agricultural control systems

• Remote I/O and sensor control

• Smart factory solutions

Industrial 8-Channel ESP32-S3 WiFi Relay Module with Isolated CAN, Ethernet & PoE

Boost your automation projects with this powerful 8-channel relay module, built on the ESP32-S3 dual-core processor (up to 240MHz). Supports WiFi, Bluetooth, Ethernet, and PoE for flexible networking.

🔹 8 Relays – Control motors, lights, and other devices
🔹 Isolated CAN Bus – Stable multi-device communication in industrial environments
🔹 Digital Inputs – Trigger actions from sensors or switches
🔹 Power over Ethernet (PoE) – Simplify wiring with combined power & data
🔹 Multiple Protections – Power and optocoupler isolation for safety and reliability

Perfect for smart factories, IoT control systems, and automation setups.

✅ Safe | ✅ Reliable | ✅ Industrial-Grade

Industrial 8-Ch ESP32-S3 WiFi Relay Modulen Based on ESP32-S3, Supports WiFi / Bluetooth

Version options

ESP32-S3-ETH-8DI-8RO-C
Common network port + isolated CANn 8-ch digital inputs + 8-ch relays

ESP32-S3-POE-ETH-8DI-8RO-C
PoE network port + isolated CAN
8-ch digital inputs + 8-ch relays

Features

• 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 250V AC / 30V DC
• Supports passive and active digital input, with bi-directional optocoupler isolation. The relay supports digital input linkage control
• Onboard isolated CAN interface, for connecting to various CAN devices
• Onboard pin header, allowing access to other devices
• 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 RTC chip, supports scheduled tasks
• Onboard W5500 Ethernet chip for extending 10/100Mbps network port through SPI interface
• Optional for PoE network port version, with built-in PoE module for PoE capability (compliant with IEEE 802.3af standard)
• 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
• Onboard TF card slot for external TF card storage of images and files
• Built-in buzzer, RGB LED, power supply and CAN TX/RX indicators for monitoring the operating status of the devices
• Rail-mounted ABS case, easy to install, safe to use

Specifications

Based on ESP32-S3, Designed
for AIoT market

Equipped with Xtensa 32-bit LX7 dual-core processor, capable of running at 240 MHz, with Powerful AI Computing Performance and Security Encryption Mechanism; Integrated 2.4GHz Wi-Fi and Bluetooth LE dual-mode wireless communication

Onboard multiple isolation protection circuits

Multiple protections, more safe and reliable

supports CAN and Bluetooth / WIFi remote control

Onboard 8-ch relays and 8-ch digital inputs
Contact rating of the onboard relay up to 10A 250V AC / 30V DC
Directly controlling 220VAC home appliances, or devices below 30V DC

Digital input

Supports passive (dry contact) and active (wet contact) digital input, with bi-directional optocoupler isolation

Application scenarios

Supports Arduino IDE

Comprehensive SDK, Dev Resources, And Tutorials To Help You Easily Get Started

Optional for PoE function

built-in PoE module, providing both network connection and power supply in one cable

* the PoE function is only available on ESP32-S3-POE-ETH-8DI-8RO-C version, and the switch shown in the picture is NOT included.

Application Examples

Provides Multiple Networking Demos With Waveshare.Cloud, Using The Lightweight
MQTT Protocol To Achieve Data Visualization Service

What's On Board

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. 8-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. RESET button
5. PoE header
   supports connecting to PoE module for PoE capability (for PoE port version only)
6. BOOT button
7. Power IC
8. Digital isolation
   prevents interference from external signal
9. Power supply isolation
   provides stable isolated voltage, needs no extra power supply for the isolated terminal
10. Bi-directional optocoupler isolation
11. RTC battery holder
12. Buzzer
13. Digital input screw terminals

14. Pin header
    for connecting other devices
15. LED indicators
    PWR: power indicator
    RXD: CAN RX indicator
    TXD: CAN TX indicator
16. USB Type-C connector
    for module power supply, firmware downloading and USB communication
17. WS2812 RGB LED
    controllable via GPIO38
18. Ethernet port
19. External antenna connector
    SMA female connector, for WiFi and Bluetooth wireless communication
20. Power supply screw terminal
    supports DC 7~36V wide voltage input
21. CAN comm interface
    for connecting to external CAN devices
22. CAN matching resistor jumper
    onboard reserved 120R matching resistor, enabled via jumper
23. Relay screw terminals

24. Onboard TVS (Transient Voltage Suppressor)
    can effectively suppress surge voltage and transient spike voltage in the circuit
25. CAN conversion chip
26. MP1605GTF-Z
    DC-DC power module
27. PCF85063ATL
    RTC chip, can achieve some scheduled tasks

28. TCA9554PWR
    GPIO expansion chip
29. W5500
    for extending 10/100Mbps network port through SPI interface
30. TF card slot
    supports external TF card storage for images and files

Enclosure Design

ABS Protection Enclosure With 35mm Rail-Mount Support, Easy To Install, Safe To Use

Outline dimensions

Common network port

PoE network port

Support Batch Customization

Support software and hardware customization
Including hardware interface, LOGO, label, case and web page, etc.

Wiki: www.waveshare.com/wiki/ESP32-S3-ETH-8DI-8RO-C

Shipping list

ESP32-S3-POE-ETH-8DI-8RO-C

1. ESP32-S3-POE-ETH-8DI-8RO-C × 1
2. 2.4G 4DB SMA antenna × 1
3. Screwdriver × 1

1

2

3