ESP32 32-Channel Relay Module DC5V/12V/24V Smart Home IoT
ESP32 32-Channel Relay Module DC5V/12V/24V Smart Home IoT
ESP32 32-Channel Relay Module – Powerful Wireless Control for Smart Home & DIY Projects
Take your smart home automation and IoT development to the next level with this feature-packed ESP32-WROOM 32-Channel Relay Module. Supporting DC 5V, 12V, and 24V power inputs, this development board gives makers, engineers, and hobbyists an all-in-one platform for wireless relay control via Wi-Fi and Bluetooth. Made in Mainland China.
Key Features
- ESP32-WROOM-32E Module On-Board: Mature, stable, and powerful — featuring a generous 4MB Flash for your firmware and programs.
- 32 Independent Relay Channels: Each relay outputs switch signals and is rated for loads up to AC250V / DC30V, making it ideal for controlling lighting, motors, appliances, and more.
- Flexible Power Supply: Supports DC 5V, DC 12V, and DC 24V input modes. Ensure your power supply capacity is above 20W for reliable operation.
- Full I/O Breakout: All ESP32 I/O ports and UART programming download ports are exposed for convenient secondary development and custom firmware projects.
- Arduino IDE Compatible: Works seamlessly with the Arduino IDE compilation environment — reference programs are included to help you get started quickly.
- On-Board Controls: RST reset button and IO0 programmable button included for easy development and debugging.
- Replaceable Main Controller: The ESP32-WROOM module is socketed and replaceable, offering long-term flexibility and repairability.
- Wi-Fi & Bluetooth (BLE) Built-In: Enables wireless control from smartphones, tablets, or other connected devices without extra hardware.
Specifications
- Microcontroller: ESP32-WROOM-32E
- Flash Memory: 4MB
- Relay Channels: 32
- Power Supply Modes: DC 5V / DC 12V / DC 24V (>20W recommended)
- Relay Output Rating: AC250V / DC30V
- Wireless: Wi-Fi + BLE (Bluetooth Low Energy)
- Programming: Arduino IDE compatible
- Country of Origin: Mainland China
What's in the Box?
- 1× ESP32 32-Channel Relay Module
Ideal Applications
- Smart home automation systems
- Industrial and commercial switch control
- ESP32 secondary development and learning
- IoT prototyping and maker projects
- Wireless appliance and lighting control
For guidance on safe electrical practices when working with relay modules and AC/DC loads, visit the OSHA Electrical Safety Resource. Additional information on electronic component safety standards can be found at CPSC.gov.
Note: Due to screen calibration differences, actual board color may vary slightly from images. Please allow 1–10mm variance due to manual measurement.
Frequently Asked Questions
Q: What power supply voltage does the ESP32 32-Channel Relay Module support?
A: This relay module supports three DC power supply modes: DC 5V, DC 12V, and DC 24V. For stable and reliable operation, your power supply should have a capacity greater than 20W. Make sure to match your relay and load requirements to the appropriate voltage.
Q: Is this relay module compatible with the Arduino IDE?
A: Yes! The ESP32-WROOM-32E module on this board is fully compatible with the Arduino IDE. Reference programs are provided in the Arduino development environment to help you get started with your smart home or IoT project quickly.
Q: What loads can the 32 relay channels control?
A: Each of the 32 relay channels outputs a switch signal rated for loads up to AC 250V or DC 30V, making them suitable for controlling lighting circuits, motors, household appliances, and other electrical loads within those specifications.
Q: Can I replace the ESP32-WROOM module on this board?
A: Yes, the main ESP32-WROOM-32E controller module is designed to be replaceable, giving you the flexibility to swap it out for upgrades, repairs, or custom configurations without needing to replace the entire board.