ESP32 Dual-Channel 30A Relay Module WiFi Bluetooth AC220V
ESP32 Dual-Channel 30A Relay Module WiFi Bluetooth AC220V
ESP32 Dual-Channel 30A Relay Module — WiFi & Bluetooth Remote Control
Take your smart home automation or IoT development projects to the next level with this powerful ESP32 Dual-Channel 30A Relay Module. Featuring an onboard ESP32 microcontroller with built-in WiFi and Bluetooth connectivity, this development board lets you control high-current AC loads wirelessly — right out of the box. Whether you're a hobbyist, maker, or embedded systems developer, this module gives you everything you need to prototype and deploy reliable remote-controlled switching solutions.
Why Choose This Relay Module?
- Dual-Channel 5V/30A Relay: Switch two independent AC220V loads with high-current capacity — ideal for appliances, lighting, motors, and more.
- Onboard ESP32 Module: Harness the full power of the ESP32 chipset with dual-core processing, built-in WiFi (802.11 b/g/n), and Bluetooth for seamless remote control.
- AC220V Direct Power Supply: Integrated AC-to-DC transformer module means no external power adapter needed — plug directly into mains power.
- UART Pins Reserved: Dedicated UART pin header for easy secondary development, firmware flashing, and serial debugging.
- Flexible Development Environment: Compatible with both the ESP-IDF framework and the beginner-friendly Arduino IDE — get started quickly with your preferred toolchain.
- Compact & Mountable: Measures just 93×87mm with 4mm positioning holes for easy enclosure mounting or panel installation.
Key Specifications
| Microcontroller | ESP32 |
| Wireless | WiFi (802.11 b/g/n) + Bluetooth |
| Relay Channels | 2 (Dual-Channel) |
| Relay Rating | 5V / 30A per channel |
| Input Power | AC 220V (built-in AC-DC converter) |
| Communication | UART (pins reserved) |
| Positioning Hole Diameter | 4mm |
| Board Dimensions | 93 × 87mm |
| IDE Support | Arduino IDE, ESP-IDF |
| Country of Origin | Made in Mainland China |
What's in the Box?
- 1× ESP32 Dual-Channel 30A Relay Module (or shell variant — see selected option)
Important Notes
- Due to monitor/screen color variations, the actual product color may differ slightly from photos.
- Please allow 1mm–1cm tolerance due to manual measurement.
- Safety notice: This module operates on AC 220V mains voltage. Always follow proper electrical safety practices during installation. For guidance on safe electrical work, refer to OSHA's Electrical Safety Guidelines.
Frequently Asked Questions
Q: What programming environments are compatible with this ESP32 relay module?
A: This ESP32 dual-channel relay module supports both the Arduino IDE and the official ESP-IDF development environment. The reserved UART pins make it straightforward to connect a USB-to-serial adapter for firmware uploads and serial monitoring, so developers at any skill level can get started quickly.
Q: Can I control this relay module remotely over WiFi or Bluetooth?
A: Yes! The onboard ESP32 chip includes built-in WiFi (802.11 b/g/n) and Bluetooth, allowing you to control both relay channels remotely via a smartphone app, MQTT broker, HTTP commands, or any custom firmware you develop. It's perfect for smart home automation, IoT switching, and remote appliance control projects.
Q: Does this module need an external power supply?
A: No external power supply is required. The module features a built-in AC-to-DC transformer that converts AC 220V mains power directly on the board, simplifying wiring and reducing the number of components needed in your project enclosure.
Q: What is the maximum current this relay module can handle?
A: Each relay channel is rated at 30A at 5V, making it suitable for switching high-current loads such as motors, HVAC systems, industrial lighting, and household appliances connected to an AC 220V circuit.