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About esp relay wifi controller

Smart Relay Controller Butonfi

Control your relay devices over local Wi-Fi network with a single tap.
Designed for makers, hobbyists, and home automation enthusiasts.

🔧 KEY FEATURES

• Tag Mode – Send HTTP POST commands to turn devices ON or OFF instantly.
• PWM Mode – Control speed, brightness or intensity via HTTP GET (values 0–9).
• Multi-Device Dashboard – Manage all your relay devices from one screen.
• Local Network Only – No cloud, no account, no internet required.
• Custom Device Images – Assign photos to identify devices easily.
• Swipe to Delete – Remove devices with a simple swipe gesture.

🛠 COMPATIBLE DEVICES

Button Fi sends standard HTTP requests — works with any board that
runs a web server on local Wi-Fi:

• ESP32 (recommended)
• ESP8266 (NodeMCU, Wemos D1)
• Raspberry Pi (with Flask or similar)
• Arduino + Ethernet/Wi-Fi shield
• Any microcontroller with HTTP server support

📡 HOW IT WORKS — TAG MODE

Your ESP32/ESP8266 listens for HTTP POST requests:

POST http://192.168.0.x/ON → Relay turns ON
POST http://192.168.0.x/OFF → Relay turns OFF

Set Tag1 = ON and Tag2 = OFF in the app. That's it.

🎛 HOW IT WORKS — PWM MODE

Your device listens for HTTP GET with a data parameter:

GET http://192.168.0.x/?data=5 → Sends value 5 (range: 0–9)

Map 0–9 to 0–255 on your microcontroller for full PWM control.
Perfect for fan speed, LED brightness, motor control and more.

🏠 USE CASES

- Smart home lighting and fan control
- Greenhouse pump and ventilation automation
- Workshop equipment switching
- Laboratory relay control
- DIY IoT projects with ESP32 / ESP8266
- Raspberry Pi GPIO control via Flask API
- Any HTTP-based relay or actuator system

⚙ QUICK ESP32 SETUP

1. Upload a simple WebServer sketch to your ESP32
2. Connect ESP32 to your local Wi-Fi
3. Find the IP address from Serial Monitor
4. Add the device in Button Fi with that IP
5. Set your ON/OFF tags or enable PWM mode
6. Control your relay instantly from the dashboard

No pairing process. No Bluetooth. No cloud sync.
Pure local HTTP — fast, reliable, private.

⚠ SAFETY NOTICE

Button Fi controls real electrical relay devices.
Improper wiring may cause damage, injury, or fire.
Always have wiring done by a qualified electrician.
The developer is not responsible for any harm or
damage resulting from the use of this application.
Use entirely at your own risk.

Keywords: ESP32 relay control, ESP8266 WiFi switch, smart relay app,
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Raspberry Pi GPIO app, home automation relay, HTTP POST switch,
DIY smart home Android, WebServer ESP32 app, relay module control, buton fi