ESP8266 Smart LED Matrix Clock

An feature-rich smart clock built on the ESP8266 (NodeMCU/Wemos D1 Mini) utilizing a MAX7219 LED matrix. It features NTP time synchronization, morning weather updates, custom birthday/holiday messages, and a complete Web Dashboard for remote control.

Features

• Accurate Clock: NTP time sync (IST UTC+5:30) with a custom 3x5 font and seconds animation.
• Weather Updates: Connects to the Open-Meteo API for temperature, humidity, wind, and smart advisories.
• Web Dashboard: Modern mobile-responsive interface to view system status, queue messages, toggle screen orientation, and test events.
• Smart Scrolling Engine: Smooth horizontal scrolling for long text across the 4 matrices.
• Holidays & Birthdays: Built-in dates trigger automatic greetings on the matrix.

Circuit Diagram

Connect your ESP8266 to the MAX7219 matrix module as follows:

graph LR
    ESP[ESP8266 NodeMCU]
    MAX[MAX7219 LED Matrix]
    
    ESP -- "3V3/5V" --> MAX_VCC(VCC)
    ESP -- "GND" --> MAX_GND(GND)
    ESP -- "D7 (GPIO13)" --> MAX_DIN(DIN)
    ESP -- "D5 (GPIO14)" --> MAX_CLK(CLK)
    ESP -- "D2 (GPIO4)" --> MAX_CS(CS)
    
    style ESP fill:#2a9d8f,stroke:#333,stroke-width:2px,color:#fff
    style MAX fill:#e76f51,stroke:#333,stroke-width:2px,color:#fff

Setup & Installation

1. Hardware: Wire the MAX7219 matrix to the ESP8266 according to the diagram above.
2. Software:
   • Install the ESP8266 core for Arduino in your IDE.
   • Install the MD_MAX72XX library via the Library Manager.
3. Configuration:

   • Open wificlock.ino.

   • Update your Wi-Fi credentials:

     const char* WIFI_SSID = "YOUR_SSID";
     const char* WIFI_PASS = "YOUR_PASSWORD";

   • Make sure #define HARDWARE_TYPE MD_MAX72XX::FC16_HW matches your physical matrix type.

4. Flash: Upload to your ESP8266.
5. Dashboard: Once connected to WiFi, the serial monitor will print the local IP address. Navigate to http://<YOUR_IP> in any browser.

Code Link

• View Original Repository on GitHub ↗

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