ESP32-S3 1-Channel Relay

The ESP32-S3-Relay-1CH combines the powerful ESP32-S3 microcontroller with an integrated relay output and is ideal for automation, control, and smart home applications. The module features Wi-Fi and Bluetooth LE for wireless communication and can be programmed via Arduino IDE, ESP-IDF, or MicroPython. In addition to the relay, numerous GPIOs are available, accessible via expansion headers. The relay supports switching AC and DC loads, making it versatile, for example for lighting, pumps, or motors. Thanks to its compact design, accessory cable, and included screwdriver, the module can be immediately integrated into prototypes and installations.

Features:

• The module is based on the ESP32-S3 with a dual-core processor and integrated Wi-Fi/Bluetooth.
• A 1-channel relay enables direct switching of AC and DC loads.
• Programming is flexible via Arduino IDE, ESP-IDF, or MicroPython.
• GPIO extensions are available via pin headers.
• The compact design facilitates integration into smart projects.
• The scope of delivery includes a 4-pin JST cable and a screwdriver.
• The circuitry is reliably designed with isolation and protection functions.

Application Examples:

• Control of lamps, pumps, or valves over Wi-Fi.
• Integration into smart building or home automation.
• Prototyping automation and control solutions with a relay.
• Use in education for practical projects with ESP32 and relay control.

Documentation:

• Waveshare Wiki

Board Overview:

1. ESP32-S3 up to 240 MHz with 2.4 GHz WiFi and BLE
2. DC-DC Power Module, up to 3.3 V 2 A
3. Pin header for additional modules
4. Screw terminal for DC 5 V input
5. USB Type-C port (Power, Firmware, Communication)
6. RTC Battery Header (SH1.0)
7. Onboard ceramic antenna
8. IPEX1 connector for external antenna
9. LED indicators (PWR, relay status, RS485 TX/RX)
10. Optocoupler isolation
11. Power supply isolation (separate voltage stabilization)
12. ESP32 BOOT button
13. ESP32 RESET button
14. TVS diode (overvoltage protection)
15. Relay, 1-channel, ≤10 A 250 V AC or ≤10 A 30 V DC
16. RS485 matching resistor (120R, activatable via jumper)
17. RS485 and relay terminal
18. PCF85063 RTC chip
19. 16 MB Flash
20. Digital isolation against interference
21. RS485 transceiver chip
22. ME6217C33M5G LDO regulator, max. 800 mA output
23. Reinforced trace for high current

Technical Specifications:

• Manufacturer: Waveshare
• Manufacturer SKU: 32152
• Microcontroller: ESP32-S3, Dual-Core, 240 MHz
• Communication: Wi-Fi 802.11 b/g/n, Bluetooth 5 (LE)
• Relay: 1 channel, ≤10 A 250 V AC or ≤10 A 30 V DC
• Flash: 16 MB
• RTC: PCF85063 with battery connector
• Interfaces: GPIO, UART, I²C, SPI, RS485
• Power supply: 5 V DC (terminal or USB-C)
• Dimensions: 91 × 25 × 60 mm
• Weight: 77 g

Package Contents:

• 1x ESP32-S3-Relay-1CH
• 1x JST to 4-Pin Dupont Female Cable
• 1x Slotted screwdriver