Industrial 1-Channel ESP32-S3 WiFi Relay Module, Supports WiFi / Bluetooth / RS485 Control, With Multiple Isolation Protection Circuits, Rail-Mount Case
WiFi, Bluetooth, RS232 / RS485 / CAN / DALI2 , ESP32-S3, Industrial Controller

Industrial 1-Channel ESP32-S3 WiFi Relay Module, Supports WiFi / Bluetooth / RS485 Control, With Multiple Isolation Protection Circuits, Rail-Mount Case

SKU:32152
Part No.:ESP32-S3-Relay-1CH
Brand:Waveshare

$17.99
PriceQuantity
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$17.592
$17.393
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Industrial 1-Channel ESP32-S3 WiFi Relay Module, Supports Wi-Fi / Bluetooth, Onboard RS485 interface, With Multiple Isolation Protection Circuits, Industrial-Grade Rail-Mount Case
Industrial 1-Ch ESP32-S3 WiFi Relay Module

Based on ESP32-S3, Supports Wi-Fi / Bluetooth, Onboard RS485 interface

Built-in protection circuits such as power isolation and optocoupler isolation, Safe & Stable & Reliable

Industrial 1-Channel ESP32-S3 WiFi Relay Module, front view
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 5 (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 RTC chip, supports scheduled tasks
  • Onboard USB Type-C port for power supply, firmware downloading and debugging
  • Onboard power supply screw terminal, supports 5V power supply only
  • Onboard optocoupler isolation to prevent interference from external high-voltage circuit
  • Onboard digital isolation to prevent interference from external signal
  • Onboard unibody power supply isolation, providing stable isolated voltage, no extra power supply is required for the isolated terminal
  • Onboard RS485 TX/RX indicators for monitoring the operating status of the module
  • Rail-mounted protective case, easy to install, safe to use
Specifications
Microcontroller ESP32-S3 (Default module: ESP32-S3R8, customizable for other modules)
Wireless communication 2.4GHz WiFi (802.11 b/g/n, Bluetooth 5 (LE)
USB Connector USB Type-C
Power supply 5V
Functions Power supply, USB communication, firmware downloading, etc.
ISOLATED RS485 Connector Screw terminal
Direction control Automatically controlled via main controller hardware flow settings
Protection TVS diode, surge protection & ESD protection
Resistor Onboard reserved 120R matching resistor, NC by default, enabled via jumper
Relay Contact rating ≤10A 250VAC/30VDC
Relay channel 1
Contact form 1 NO
Isolation Optocoupler isolation
LED indicators PWR indicator Red power indicator, lights up when there is USB connection and voltage is detected
Relay indicator lights up when the Normally Open (NO) is closed
RS485 indicator lights up green when the RS485 port sends data
lights up blue when the RS485 port receives data
power supply Screw terminal Voltage range 5V
Appearance Enclosure Rail-mount protective case
Dimensions 91.6 × 23.3 × 58.7 (mm)

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 5 (LE) dual-mode wireless communication

Industrial 1-Channel ESP32-S3 WiFi Relay Module, based on ESP32-S3
Onboard multiple isolation protection circuits

Multiple protections, more safe and reliable

Industrial 1-Channel ESP32-S3 WiFi Relay Module, multiple isolation protection circuits
High quality 1-Ch relay, supports RS485 and Bluetooth / WIFi remote control

Contact rating of the onboard relay up to 10A 250VAC/30VDC
Directly controlling 220VAC home appliances, or devices below 30VDC

Industrial 1-Channel ESP32-S3 WiFi Relay Module, connection methods
Supports Arduino development

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


Application Example

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

Industrial 1-Channel ESP32-S3 WiFi Relay Module, application example
Interface Description
Industrial 1-Channel ESP32-S3 WiFi Relay Module, interface description
Top Terminal Block Description Bottom Terminal Block Description
Power Supply Terminal Power positive: DC 5V RS485 Terminal A+ signal pin
Power negative
Type-C for power supply, firmware download, and USB communication B- signal pin
SH1.0 GND Ground (GND) Relay Terminal Relay COM
3V3 3.3V power output
GPIO2 ESP32-S3 IO pin Relay NO
GPIO1 ESP32-S3 IO pin
Industrial 1-Channel ESP32-S3 WiFi Relay Module, pin definition
What's On Board
Industrial 1-Channel ESP32-S3 WiFi Relay Module, onboard components
  1. ESP32-S3
    up to 240MHz operating frequency, with 2.4GHz WiFi and BLE
  2. DC-DC power module
    supports up to 3.3V 2A output
  3. Pin header (2.0mm pitch)
    for connecting to other functional modules
  4. Power supply screw terminal
    supports DC 5V voltage input
  5. USB Type-C port
    for module power supply, firmware downloading and USB communication
  6. RTC battery header
    for connecting rechargeable RTC battery (SH1.0)
  7. Onboard ceramic antenna
  8. IPEX 1 connector
    for connecting external antenna, enabled via resoldering an onboard resistor
  9. LED indicators
    PWR: Power indicator
    RELAY: Relay indicator, lights up when the Normally Open (NO) is closed
    RS485: lights up green when the RS485 port sends data; lights up blue when the RS485 port receives data
  1. Optocoupler isolation
  2. Power supply isolation
    Provides stable isolated voltage, no extra power supply is required for the isolated terminal
  3. ESP32 BOOT button
  4. ESP32 RESET button
  5. TVS diode
    Effectively suppresses surge voltage and transient spike voltage in the circuit
  6. Quality relay
    contact rating: ≤10A 250V AC or ≤10A 30V DC
  7. RS485 matching resistor
    Onboard reserved 120R matching resistor, enabled via jumper
  8. RS485 and relay terminal
  9. PCF85063 RTC chip
  10. 16MB Flash
  11. Digital isolation
    prevents interference from external signal
  12. RS485 transceiver chip
  13. ME6217C33M5G
    Low dropout regulator, 800mA output (Max.)
  14. Thicken track for large current

Enclosure Design

Protection Enclosure with 35mm rail-mount support, easy to install, safe to use

Industrial 1-Channel ESP32-S3 WiFi Relay Module, with rail-mount case

Outline dimensions
Industrial 1-Channel ESP32-S3 WiFi Relay Module, outline dimensions

Support Batch Customization

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


Resources & Services
Wiki: www.waveshare.com/wiki/ESP32-S3-Relay-1CH

Selection guide
Model DI DO Relay RS485 CAN network port PoE RTC buzzer TF antenna PIN header

ESP32-S3-Relay-6CH		 - - 6 √ - - - - √ - √ 40PIN header, compatible with Raspberry Pi Pico interface, 2.54mm pitch

ESP32-S3-ETH-8DI-8RO		 8 - 8 √ - √ - √ √ √ √ 28PIN header, 2.54mm pitch

ESP32-S3-POE-ETH-8DI-8RO		 8 - 8 √ - √ √ √ √ √ √ 28PIN header, 2.54mm pitch

ESP32-S3-ETH-8DI-8RO-C		 8 - 8 - √ √ - √ √ √ √ 28PIN header, 2.54mm pitch

ESP32-S3-POE-ETH-8DI-8RO-C		 8 - 8 - √ √ √ √ √ √ √ 28PIN header, 2.54mm pitch

ESP32-S3-POE-ETH-8DI-8DO		 8 8 - √ √ √ √ √ √ √ √ 8PIN screw terminal, 5.0mm pitch

ESP32-S3-Relay-1CH		 - - 1 √ - - - √ - - √ 20PIN header, 2.54mm pitch

ESP32-S3-RS485-CAN		 - - - √ √ - - √ - - √ 20PIN header, 2.54mm pitch

Weight: 0.077 kg

Quick Overview

  1. ESP32-S3-Relay-1CH x1
  2. SH1.0 4PIN cable ~150mm x1
  3. Screwdriver x1
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