ESP8266-12F WiFi DIY Relay Module – TCP & MQTT Control
ESP8266-12F WiFi DIY Relay Module – TCP & MQTT Control
ESP8266-12F WiFi DIY Relay Module – Smart Remote Control Switch
Take full control of your home automation projects with the ESP8266-12F WiFi DIY Relay Module. Built around the powerful ESP8266-12F wireless chipset, this secondary-development-ready module lets makers, hobbyists, and engineers design their own smart switch firmware — no proprietary lock-in required. Control lights, fans, electric blankets, and virtually any household appliance remotely over your WiFi network.
Key Features
- Flexible Development Options: Use the pre-installed communication protocols (TCPServer, TCPClient, HTTP GET, MQTT, Bafa Cloud) out of the box, or flash your own custom firmware via the onboard program upload interface.
- DIY-Friendly Design: A dedicated firmware upload port on the back allows repeated flashing of self-written programs — perfect for iterative development and testing.
- Dual Power Support: Compatible with both 220V AC and 5V DC power input, giving you versatile deployment options.
- Multiple Control Modes: Supports TCPServer, TCPClient, HTTP GET, MQTT, and Bafa Cloud connectivity for maximum integration flexibility.
- Smart Home Ready: Easily integrate into existing smart home ecosystems — control appliances such as lamps, fans, heaters, and more from anywhere with an internet connection.
- Open Hardware Platform: Based on the widely supported ESP8266 chipset, with an enormous community, libraries, and resources available online.
Development Methods
Method 1 – Use Built-In Protocols
Configure working modes and connection parameters via the included setup tool. The device ships with pre-installed support for TCPServer, TCPClient, HTTP GET, MQTT, and Bafa Cloud — connect to your server or write a control app without touching the hardware firmware.
Method 2 – Full Firmware Redevelopment
If the default protocols don't fit your project, dive deeper. The ESP8266-12F core allows complete hardware firmware redevelopment for those with embedded development experience — the possibilities are truly unlimited.
Specifications
- Core Module: ESP8266-12F (2.4 GHz WiFi)
- Supported Protocols: TCPServer, TCPClient, HTTP GET, MQTT, Bafa Cloud
- Power Input: 220V AC / 5V DC
- WiFi Compatibility: 2.4 GHz routers only (5 GHz routers are NOT supported)
- EU LVD Voltage: Low Voltage — Below 50V AC or 75V DC
- Country of Origin: Made in Mainland China
Package Includes
- 1× ESP8266-12F WiFi Relay Module or 1× Burner (depending on variant selected)
Important Notes
- This module supports 2.4 GHz routers only — it cannot connect to 5 GHz WiFi networks.
- Slight color variations may occur due to monitor display differences.
- Please allow 1–10 mm measurement tolerance due to manual sizing.
For general guidance on electrical safety and DIY electronics projects, visit the U.S. Consumer Product Safety Commission – Electrical Safety.
Learn more: Pmod Interface
Frequently Asked Questions
Q: Does the ESP8266-12F WiFi Relay Module work with 5 GHz WiFi routers?
A: No. The ESP8266-12F chip only supports 2.4 GHz WiFi networks. Please ensure your router broadcasts a 2.4 GHz band (most dual-band routers offer both). The module will not connect to a 5 GHz-only network.
Q: Can I upload my own custom firmware to this relay module?
A: Yes! The module features a dedicated program upload interface on the back, allowing you to flash your own firmware repeatedly. It is fully compatible with the Arduino IDE, MicroPython, and other ESP8266-supported development environments.
Q: What communication protocols does this relay module support out of the box?
A: The module comes pre-loaded with support for TCPServer, TCPClient, HTTP GET, MQTT, and Bafa Cloud. You can configure these modes using the provided setup tool without writing any code.
Q: What appliances can I control with this WiFi relay module?
A: The module can switch most standard household appliances that operate on supported voltage levels, including electric lights, fans, electric blankets, and other common devices. Always ensure the load rating of your relay is not exceeded for safe operation.