4-Channel ESP8266 WiFi Relay Module – DIY Smart Switch
4-Channel ESP8266 WiFi Relay Module – DIY Smart Switch
4-Channel ESP8266-12F WiFi Relay Module – DIY Smart Home Control Board
Take full control of your home automation projects with this 4-Way ESP8266-12F WiFi Relay Module. Designed for makers, developers, and DIY enthusiasts, this development board lets you independently program and customize your own remote-control switch system — no off-the-shelf limitations. Control lights, fans, electric blankets, and other household appliances wirelessly over your local network or the internet.
Key Features
- 4 Independent Relay Channels — Switch up to four appliances or circuits simultaneously
- ESP8266-12F WiFi Core — Industry-proven 2.4GHz WiFi module for reliable wireless connectivity
- Dual Power Support — Works with both 220V AC and 12V DC power inputs
- Multiple Communication Protocols — Pre-loaded with TCPServer, TCPClient, HTTP_GET, MQTT, and Bafa Cloud support
- On-Board Firmware Upload Interface — Easily re-flash your own custom firmware via the back-panel programming port
- Android APP Compatible — Use the provided simple Android app for no-code control right out of the box
- 2.4GHz Router Compatible — Note: Supports 2.4GHz routers only; 5GHz routers are not supported
Three Development Paths to Suit Every Skill Level
Method 1 – Protocol-Based Custom Development
Use the built-in communication protocol instructions to write your own control program on a PC or mobile device. Configure working modes (TCPServer, TCPClient, HTTP_GET, MQTT, or Bafa Cloud) via the provided settings tool — ideal for programmers who prefer coding their own control interface.
Method 2 – Plug-and-Play App Control (No Coding Required)
Use the included Android APP to control the board directly over Server or Client mode, with no programming knowledge needed. Perfect for everyday users who want smart-switch functionality without writing a single line of code.
Method 3 – Full Firmware Redevelopment
For advanced hardware developers, the on-board firmware burning interface lets you completely rewrite the ESP8266-12F firmware, giving you 100% flexibility to meet any custom requirement or integrate with any IoT platform.
What Can You Control?
This module is suitable for creating smart switches to control most standard household appliances, including:
- Electric lights and lamps
- Ceiling and table fans
- Electric blankets and heating pads
- Small motors and pumps
- Various other AC/DC electrical devices
Specifications
- Chipset: ESP8266-12F
- Number of Channels: 4
- Supported Power: 220V AC / 12V DC
- WiFi Band: 2.4GHz (5GHz NOT supported)
- Supported Protocols: TCPServer, TCPClient, HTTP_GET, MQTT, Bafa Cloud
- Programming Interface: Firmware upload port on back panel
- EU LVD Voltage: Low voltage — below 50V AC or 75V DC
- Country of Origin: Made in Mainland China
Package Includes
- 1× 4-Way Relay Module or 1× Burner (depending on selected option)
Note: Due to lighting and screen differences, colors may vary slightly from product images. Please allow 1mm–1cm differences due to manual measurement.
Learn More About Smart Home & IoT Safety
For guidance on safe electrical device use at home, refer to the U.S. Consumer Product Safety Commission (CPSC) Home Safety resources. For IoT and smart device standards, the NIST Cybersecurity for IoT Program offers helpful guidance for developers and consumers alike.
Frequently Asked Questions
Q: Does the ESP8266-12F WiFi relay module work with 5GHz routers?
A: No — this module supports 2.4GHz WiFi routers only. If your router is a 5GHz-only model, it will not connect. Most dual-band routers broadcast both 2.4GHz and 5GHz networks; simply connect the module to your 2.4GHz network.
Q: Do I need programming experience to use this 4-channel relay board?
A: Not at all! The board ships with pre-installed firmware and a compatible Android APP that lets you control all four relays with no coding. For users who want more customization, the on-board programming interface supports uploading custom ESP8266 firmware.
Q: What types of appliances can I control with this WiFi relay module?
A: You can control most standard household appliances rated for 220V AC, including lights, fans, electric blankets, and small motors. For DC setups, the module also supports 12V DC operation, making it suitable for a wide range of DIY electronics and automation projects.
Q: Which communication protocols does this relay module support?
A: The board comes pre-loaded with TCPServer, TCPClient, HTTP_GET, MQTT, and Bafa Cloud communication modes. You can switch between modes using the provided settings tool, or completely replace the firmware with your own to support any additional protocol you require.