Overview
This simple yet smart project turns an ESP8266 and a MAX7219 LED matrix into a Wi-Fi-enabled digital clock and message board. It connects to your Wi-Fi, fetches the time using NTP, and displays it in real-time — but with a twist. A built-in web interface allows you to switch modes and show custom messages on the LED matrix.
Why I Made This
I wanted a fun, functional project that didn’t rely on apps or cloud services. With just a browser, anyone on the same Wi-Fi can control the clock or post a message. It’s the perfect DIY desk gadget.
Clock displays the text
Wiring
- VCC → 3V
- GND → GND
- DIN → D7 (GPIO13)
- CS → D8 (GPIO15)
- CLK → D5 (GPIO14)
Web Interface
- Shows current IP address on matrix after connecting
- Offers buttons to switch to Clock Mode
- Message Mode lets you enter any text to scroll on the display
Web interface lets you toggle between Clock and Message Mode.
Software Stack
- ESP8266 Arduino Core
- NTPClient for time sync
- MD_Parola + MD_MAX72XX libraries for matrix display
- Simple HTTP WebServer for control