ESP32 WiFi Relay Module AC220V 30A Single-Channel Dev Board
ESP32 WiFi Relay Module AC220V 30A Single-Channel Dev Board
ESP32 Single-Channel AC220V 30A WiFi Relay Module Development Board
Take your automation and IoT projects to the next level with this ESP32-powered WiFi relay module. Designed for makers, engineers, and developers, this compact development board combines a powerful ESP32 microcontroller with a robust 5V/30A single-channel relay capable of switching AC220V loads — all in one ready-to-use package.
Whether you're building a smart home controller, an industrial automation prototype, or a remote switching application, this board provides everything you need to get started quickly and scale with confidence.
Key Features
- ESP32 Microcontroller: Dual-core processor with integrated WiFi and Bluetooth for versatile wireless connectivity and remote control capability.
- AC220V Input & Output Support: Built-in AC-to-DC transformer module converts mains power on-board — no external power supply required.
- 5V / 30A Single-Channel Relay: Heavy-duty relay handles high-current AC loads up to 30A with reliable switching performance.
- UART Burning Support: Reserved UART pin interface makes firmware flashing and secondary development straightforward and convenient.
- Dual IDE Compatibility: Develop using the official ESP-IDF framework or the beginner-friendly Arduino IDE — your choice.
- Mounting Ready: 3.5mm positioning holes allow secure mounting in enclosures or on DIN rails.
- Compact Form Factor: Measures just 47 × 78mm, ideal for space-constrained builds.
Specifications
| Parameter | Value |
|---|---|
| Microcontroller | ESP32 |
| Relay Rating | 5V / 30A Single-Channel |
| Input / Output Voltage | AC220V |
| Connectivity | WiFi + Bluetooth (ESP32) |
| Development Interface | UART (pins reserved) |
| Supported IDEs | ESP-IDF, Arduino IDE |
| Mounting Hole Diameter | 3.5mm |
| Board Dimensions | 47 × 78mm |
| Country of Origin | Made in China |
What's in the Box
- 1× ESP32 Single-Channel AC220V 30A WiFi Relay Module Development Board
Important Notes
- Due to monitor color calibration differences, the actual product color may vary slightly from images.
- Please allow 1mm–1cm tolerance in dimensions due to manual measurement.
- ⚠ Safety Warning: This board operates at mains voltage (AC220V). Always follow proper electrical safety practices during installation. For safety guidelines on working with electrical equipment, refer to OSHA Electrical Safety Standards.
Frequently Asked Questions
Q: Can I program this ESP32 relay module using the Arduino IDE?
A: Yes! This development board fully supports the Arduino IDE in addition to the ESP-IDF framework. The reserved UART pins make it easy to connect a USB-to-serial adapter and flash your firmware directly from your computer.
Q: What types of loads can I control with the AC220V 30A relay?
A: The 5V/30A single-channel relay is rated for AC220V, making it suitable for switching high-current appliances such as motors, heaters, lighting circuits, and other mains-powered devices — provided they fall within the 30A current rating.
Q: Does this board support remote control over WiFi?
A: Absolutely. The onboard ESP32 module features integrated WiFi connectivity, enabling you to build remote-control and IoT automation applications that operate over your local network or the internet via custom firmware.
Q: Do I need an external power supply for the ESP32 relay module?
A: No external power supply is needed. The board includes a built-in AC-to-DC transformer module that converts the AC220V input to the 5V DC required to power the ESP32 and relay circuitry on-board.