Home Waveshare Industrial 8-Channel ESP32-S3 WiFi Relay ETH 8DI 8RO Module RS485

Waveshare Industrial 8-Channel ESP32-S3 WiFi Relay ETH 8DI 8RO Module RS485

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SKU: Waveshare-30838
Port: PoE Ethernet port
Sale price 49,95 €
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Guarantee & Return Policy

Effective Date: December 10, 2025

At OpenELAB, we are committed to providing accurate product descriptions and high-quality electronics. The following policy outlines your rights and obligations, designed to be fair to both our customers and our business operations globally.

1. Warranty Policy

A. Standard Limited Warranty (Global & US)

For customers in the United States, Asia, and other non-EU regions:

  • Warranty Period: OpenELAB provides a 12-month warranty from the date of delivery.

  • Coverage: This warranty covers defects in material and workmanship under normal use.

  • Resolution: We will repair or replace defective units at no charge.

B. Statutory Rights for EU/UK Customers (EU Compliance)

If you are a consumer residing in the European Union or the UK purchasing from our global site:

  • Statutory Guarantee: You are entitled to a 24-month statutory guarantee for conformity defects present at the time of delivery, in accordance with EU consumer protection laws.

  • Relation: The Standard Limited Warranty (Section 1.A) applies in addition to, and does not replace, your statutory rights.

C. Warranty Exclusions (Applies to ALL Regions)

Warranty coverage is VOID if the damage is caused by:

  1. Misuse: Incorrect installation, reverse polarity, or exceeding voltage limits.

  2. Unauthorized Modification: This explicitly includes soldering, cutting pins, modifying the PCB, or flashing unauthorized/beta firmware that "bricks" the device.

  3. Physical Damage: Drops, moisture/water damage, or electrical surges (lightning).

  4. Normal Wear & Tear: Consumable parts (e.g., batteries), unless defective upon arrival.

Note: For non-warranty repairs (e.g., customer-induced damage), we may offer repair services for a fee. Shipping and diagnostic costs will be borne by the customer.

2. Return & Refund Policy

A. Return Window

  • Standard: You may request a return within 31 days of receiving your order.

B. Refund Conditions & Restocking Fees

To protect against policy abuse, the refund amount is strictly determined by the condition of the returned item.

1. Full Refund (100%)

  • The item is Brand New, Unopened, and Unused.

  • The original packaging is intact and sealed.

  • All accessories are present.

2. Partial Refund (Restocking Fee / Value Depreciation)
If the item is returned in a condition that prevents it from being sold as new, OpenELAB reserves the right to deduct a Restocking Fee (for US/Global) or Compensation for Loss of Value (for EU) from the refund amount.
Deductions apply if:

  • Signs of Use: Visible scratches, mounting marks on screw holes, or fingerprints.

  • Damaged Packaging: Original box is torn, written on, or missing.

  • Technical Modification: The device has been soldered, permanently installed, or flashed with unauthorized firmware.

  • Broken Seals: Anti-static bags or security seals have been opened.

Depending on the severity of the usage/damage, the deduction may range from 15% to 50% of the product price. Items damaged beyond repair due to misuse will not be refunded.

C. Shipping Costs

  • Defective / Wrong Item: OpenELAB covers the return shipping cost.

  • Customer Remorse (Changed Mind / Ordered Wrong Item): The customer is responsible for all return shipping costs to our designated return center (located in the US, Germany, or China, depending on your region). Original shipping fees are non-refundable unless required by local law.

3. Return Process (RMA)

To ensure a smooth return process, please follow these steps:

  1. Authorization: Contact us at info@openelab.io before returning any item. Returns without prior authorization will not be accepted.

  2. RMA Number: We will provide you with a Return Merchandise Authorization (RMA) number and the correct return address.

  3. Packing: Ship the item back in its original packaging with the RMA number clearly marked on the shipping label (not on the product box).

  4. Tracking: We strongly recommend using a trackable shipping method. OpenELAB is not responsible for returns lost in transit.
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Waveshare Industrial 8-Channel ESP32-S3 WiFi Relay ETH 8DI 8RO Module RS485

Waveshare Industrial 8-Channel ESP32-S3 WiFi Relay ETH 8DI 8RO Module RS485

Waveshare Industrial 8-Channel ESP32-S3 WiFi Relay ETH 8DI 8RO Module RS485 is a reliable development board designed for industrial automation, IoT, and smart home control. Powered by the ESP32-S3 dual-core processor, it supports Wi-Fi, Bluetooth LE, and stable 10/100Mbps Ethernet connectivity. With 8 optically isolated digital inputs and 8 relay outputs (up to 10A), it enables direct control of appliances, industrial equipment, and intelligent systems.

 

Features

  • ESP32-S3 microcontroller with Xtensa 32-bit LX7 dual-core processor, running at 240 MHz
  • Integrated 2.4GHz Wi-Fi and Bluetooth LE dual-mode wireless communication
  • High-quality relay, contact rating ≤10A 250V AC / 30V DC
  • Supports passive and active digital input with bi-directional optocoupler isolation
  • Isolated RS485 interface for Modbus communication with industrial modules or sensors
  • Pin header for connecting additional devices
  • USB Type-C port for power supply, firmware downloading, and debugging
  • Wide voltage input (7~36V) via screw terminal, suitable for industrial environments
  • RTC chip for scheduled tasks
  • W5500 Ethernet chip for extending 10/100Mbps network port through SPI interface
  • Optional PoE version with built-in module, compliant with IEEE 802.3af standard
  • Optocoupler isolation to prevent interference from external high-voltage circuits
  • Digital isolation to protect against external signal interference
  • Unibody power supply isolation, providing stable isolated voltage without extra supply
  • TF card slot for external storage of images and files
  • Built-in buzzer, RGB LED, and indicators for power and RS485 TX/RX status
  • Rail-mounted ABS case for easy installation and safe operation


Specifications

Version ESP32-S3-POE-ETH-8DI-8RO ESP32-S3-POE-ETH-8DI-8RO-C
Microcontroller ESP32-S3 (Default module: ESP32-S3-WROOM-1U-N16R8, customizable for other modules)
Wireless communicatoin 2.4GHz WiFi (802.11 b/g/n)、Bluetooth 5, BLE
USB Connector USB Type-C
Power supply 5V
Functions Power supply, USB communication, firmware downloading, etc.
isolated comm interface Interface RS485 CAN
Connector Screw terminal
Direction control Hardware automatic control
Protection TVS diode, surge protection & ESD protection
Resistor Onboard reserved 120R matching resistor, NC by default, enabled via jumper
Ethernet interface PoE Ethernet port, supports IEEE 802.3af standard (for PoE port version only)
Digital input Input channels 8
Input voltage 5V~36V
Input type Passive input / active input (NPN or PNP type)
Isolation type Bi-directional optocoupler isolation
Relay Contact rating ≤10A 250V AC / 30V DC
Relay channels 8
Contact form 1NO 1NC
Isolation Optocoupler isolation
LED indicators RGB RGB colorful LED, supports programmable control of display color
PWR Red power indicator, lights up when there is USB connection and voltage is detected
TXD Green TX indicator, lights up when the RS485/CAN port sends data
RXD Blue RX indicator, lights up when the device port sends data back
power supply Screw terminal Voltage range 7~36V
Appearance Enclosure Rail-mount ABS protective case
Dimensions 175 × 90 × 40 (mm)

 

Part List

ESP32-S3-ETH-8DI-8RO

  • ESP32-S3-ETH-8DI-8RO × 1
  • 2.4G 4DB SMA antenna × 1
  • Screwdriver × 1
ESP32-S3-ETH-8DI-8RO

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

  • ESP32-S3-POE-ETH-8DI-8RO × 1
  • 2.4G 4DB SMA antenna × 1
  • Screwdriver × 1
ESP32-S3-POE-ETH-8DI-8RO

 

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

Industrial 8-Channel ESP32-S3 WiFi Relay Module, built-in ESP32-S3

 

Onboard multiple isolation protection circuits

Multiple protections, more safe and reliable

Industrial 8-Channel ESP32-S3 WiFi Relay Module, multiple isolation protection circuits

 

supports RS485 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

Industrial 8-Channel ESP32-S3 WiFi Relay Module, AC / DC connection demo


Digital input

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

Industrial 8-Channel ESP32-S3 WiFi Relay Module, digital input connection


Application scenarios

Industrial 8-Channel ESP32-S3 WiFi Relay Module, linkage control demo


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

Industrial 8-Channel ESP32-S3 WiFi Relay Module, built-in PoE module

* the PoE function is only available on ESP32-S3-POE-ETH-8DI-8RO 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

Industrial 8-Channel ESP32-S3 WiFi Relay Module, application examples

 

What's On Board

Industrial 8-Channel ESP32-S3 WiFi Relay Module, PCB front view
Industrial 8-Channel ESP32-S3 WiFi Relay Module, PCB back view
  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
    1220 size (12mm diameter*2mm thickness), supports only rechargeable 3V~3.3V Batt.
  12. Buzzer
  13. Digital input screw terminal
  1. Pin header
    for connecting other devices
  2. LED indicators
    PWR: power indicator
    RXD: RS485 RX indicator
    TXD: RS485 TX indicator
  3. USB Type-C connector
    for module power supply, firmware downloading and USB communication
  4. WS2812 RGB LED
    controllable via GPIO38
  5. Ethernet port
  6. External antenna connector
    SMA female connector, for WiFi and Bluetooth wireless communication
  7. Power supply screw terminal
    supports DC 7~36V wide voltage input
  8. RS485 comm interface
    for connecting to external RS485 devices
  9. RS485 matching resistor jumper
    onboard reserved 120R matching resistor, enabled via jumper
  10. Relay screw terminals
  1. Onboard TVS (Transient Voltage Suppressor)
    can effectively suppress surge voltage and transient spike voltage in the circuit
  2. RS485 conversion chip
  3. MP1605GTF-Z
    DC-DC power module
  4. PCF85063ATL
    RTC chip, can achieve some scheduled task
  1. TCA9554PWR
    GPIO expansion chip
  2. W5500
    for extending 10/100Mbps network port through SPI interface
  3. 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

1. General Shipping Information

  • We provide reliable shipping services with a tracking number for each order.
  • Shipping addresses must be entered in English and should not contain special symbols, so that the courier system can recognize your location correctly.
  • Please make sure your shipping address is accurate before placing your order. We ship strictly according to the address provided at checkout.
  • In-stock orders are usually dispatched within 1 business day after order confirmation.
  • Estimated delivery times refer to the period after dispatch and do not include order processing time, weekends, public holidays, customs inspection, or force majeure delays.
  • If you need to cancel or modify your order, please contact us before the order is marked as “Shipped”. Once shipped, the order cannot be canceled or changed.

🚀 Need Faster Shipping?

If you require expedited shipping, please contact our customer support team at info@openelab.io for a customized quote based on your destination.

2. Shipping Rates & Options

Shipping rates are calculated based on order value, destination, and available shipping methods. The final available options will be displayed at checkout.

2.1 Germany Domestic Shipping

Shipping Method Order Value Cost Est. Delivery
Deutsche Post €0.00 - €50.00 €4.95 2-4 Business Days
Deutsche Post Over €50.00 Free 2-4 Business Days
DHL Paket
(Faster Delivery)		 €0.00 - €50.00 €6.95 1-3 Business Days
DHL Paket
(Faster Delivery)		 €50.00 - €100.00 €2.00 1-3 Business Days
DHL Paket
(Faster Delivery)		 Over €100.00 Free 1-3 Business Days

2.2 Selected EU Countries / Regions

Available EU shipping destinations are shown at checkout based on your shipping address. For orders shipped to selected EU countries or regions outside Germany, we use FedEx Regional Economy.

Shipping Method Order Value Cost Est. Delivery
FedEx Regional Economy €0.00 - €100.00 €7.95 3-5 Business Days
FedEx Regional Economy Over €100.00 Free 3-5 Business Days

EU orders may be fulfilled from our Munich warehouse or, when applicable, from our Shenzhen warehouse depending on inventory availability. For EU member states, OpenELAB covers applicable import duties and taxes under DDP service where required.

2.3 United States

Region Shipping Method Order Value Cost Est. Delivery
Continental U.S.
(50 States)		 USPS Ground Advantage €0.00 - €45.00 €4.95 3-7 Business Days
USPS Ground Advantage Over €45.00 Free 3-7 Business Days
USPS Priority Mail €0.00 - €45.00 €16.95 1-4 Business Days
USPS Priority Mail Over €45.00 €14.95 1-4 Business Days
Non-Continental U.S.
(AK, HI, PR, etc.)		 USPS Ground Advantage €0.00 - €60.00 €6.95 5-9 Business Days
USPS Ground Advantage Over €60.00 Free 5-9 Business Days

Non-Continental U.S. regions include Alaska, American Samoa, Guam, Hawaii, the Marshall Islands, the Northern Mariana Islands, Palau, Puerto Rico, the U.S. Virgin Islands, and U.S. Armed Forces addresses.

2.4 International Destinations Outside the EU

For selected international destinations outside the EU, including Switzerland, the United Kingdom, and Norway, shipping rates are as follows:

Order Amount Shipping Cost
€0.00 - €300.00 €19.95
Over €300.00 Free

For non-EU destinations, import duties, taxes, and customs fees may be charged by the destination country and are the responsibility of the recipient.

3. Warehouses & Fulfillment

Our products may be stored in our Munich, Arlington, and Shenzhen warehouses. The actual shipping warehouse depends on product availability and destination.

3.1 Munich Warehouse

For products stored in our Munich warehouse, we use Deutsche Post or DHL Paket for domestic deliveries within Germany. For selected EU destinations outside Germany, we use FedEx Regional Economy.

3.2 Arlington Warehouse

For products stored in our Arlington warehouse, we use USPS or UPS for deliveries within the United States.

3.3 Shenzhen Warehouse

For pre-order items or products fulfilled directly from our Shenzhen warehouse, we arrange reliable international shipping based on destination and inventory status. For EU member states, OpenELAB covers applicable import duties and taxes under DDP service where required.

4. Inventory, Pre-orders & Split Shipments

  • Inventory Status: Please check the product page for real-time stock information. If an item is out of stock in our local warehouses, it may be marked as “Pre-order”.
  • Pre-order Fulfillment: Pre-order items may be shipped directly from Shenzhen or restocked to a local warehouse first before final delivery.
  • Split Shipments: If your order contains both in-stock and pre-order items, we may ship them separately. No additional shipping fee will be charged for split shipments caused by our fulfillment arrangement.

5. Customs, Taxes & Delivery Issues

5.1 Customs and Taxes

For EU Member States:
Whether shipped from Germany or China, OpenELAB covers applicable import duties and taxes under DDP service where required. Customers in EU member states should not be charged additional import duties or VAT upon delivery.

Important Notice for Non-EU Countries:
For destinations outside the European Union, such as Switzerland, Norway, and the United Kingdom, import duties, taxes, and customs fees may be charged by local authorities upon delivery. These fees are the responsibility of the recipient.

5.2 Damaged, Delayed, or Lost Parcels

Please inspect your parcel upon delivery where possible. If you notice visible damage, please report it to the courier and contact us as soon as possible. This does not affect your statutory consumer rights.

If your parcel is delayed, lost, returned to sender, or the tracking information has not updated for an unusual period of time, please contact us at info@openelab.io. We will assist you in checking the shipment status with the courier.

5.3 Incorrect Address or Failed Delivery

If a parcel cannot be delivered due to an incorrect or incomplete address provided by the customer, refusal of delivery, or failure to collect the parcel, additional shipping or return costs may apply.

6. VAT

For orders within the EU, VAT is collected at checkout according to the applicable destination rules. No additional VAT should be collected upon delivery for EU member state orders covered under our DDP shipping arrangement.

Customer Reviews

Based on 12 reviews
67%
(8)
17%
(2)
17%
(2)
0%
(0)
0%
(0)
A
Avery Foster
Good module with a learning curve

I used this in an automation test bench and the wiring layout was clear. The stable automation switching and clear terminal blocks were useful for industrial control experiments. It feels better suited to real I/O testing than a loose breadboard setup.

Thank you for reviewing the Waveshare Industrial 8-Channel ESP32-S3 WiFi Relay ETH Module RS485. We are glad this industrial control and automation module worked well for your relay control, RS485, CAN and factory IoT applications.

C
Clara Kelly
Well made and easy to integrate

I used this in an automation test bench and the wiring layout was clear. The stable automation switching and clear terminal blocks were useful for industrial control experiments. It feels better suited to real I/O testing than a loose breadboard setup.

Thank you for choosing OpenELAB. We are glad the industrial control and automation module supported your relay control, RS485, CAN and factory IoT applications.

R
Ryan Walker
Good for development testing

I used this in an automation test bench and the wiring layout was clear. The clear terminal blocks and ESP32-S3 control were useful for industrial control experiments. It feels better suited to real I/O testing than a loose breadboard setup.

We appreciate the detailed note. The Waveshare Industrial 8-Channel ESP32-S3 WiFi Relay ETH Module RS485 is designed for relay control, RS485, CAN and factory IoT applications, and we are happy it matched your setup.

A
Amelia Moore
Works well overall

I used this in an automation test bench and the wiring layout was clear. The industrial I/O layout and stable automation switching were useful for industrial control experiments. It feels better suited to real I/O testing than a loose breadboard setup.

We appreciate the detailed note. The Waveshare Industrial 8-Channel ESP32-S3 WiFi Relay ETH Module RS485 is designed for relay control, RS485, CAN and factory IoT applications, and we are happy it matched your setup.

L
Leo Bennett
Strong value for prototyping

I used this in an automation test bench and the wiring layout was clear. The stable automation switching and industrial I/O layout were useful for industrial control experiments. It feels better suited to real I/O testing than a loose breadboard setup.

Thank you for reviewing the Waveshare Industrial 8-Channel ESP32-S3 WiFi Relay ETH Module RS485. We are glad this industrial control and automation module worked well for your relay control, RS485, CAN and factory IoT applications.

123