Features

In Short

• Smart Word Clock - Displays time in words using elegant LED matrix
• Automatic Brightness - Adapts to ambient light for optimal visibility
• Smart Home Ready - Native Home Assistant integration via MQTT
• Easy Setup - Web-based configuration and WiFi setup via access point
• Flexible Display - Custom colors, regional time formats, and scheduling

Feature List

Core Functionality

• Displays time in words using an LED matrix
• Web-based configuration interface
• Automatic time synchronization via NTP
• Real-time clock (RTC) backup for time keeping without network and across power outages
• support for multiple languages
• Supports different regional time formats (e.g., “VIERTEL VOR DREI” vs “DREIVIERTEL DREI”)

Hardware

• ESP32-WROOM microcontroller
• WS2812B LED strip (121 LEDs)
• DS3231 RTC module
• LDR5528 (photo resistor diode) for ambient light detection
• Supports various word layouts through modular design
• fully 3D-printable

Configuration

• Web-based configuration interface
• Persistent settings stored in flash memory
• Configurable options:
  • NTP server, timezone and update interval
  • MQTT settings
  • Clock face options
  • Light properties (color, brightness) and auto-brightness
  • Light schedule

Light Control

• Adjustable LED brightness (0-255)
• RGB color control with hex color values (#RRGGBB)
• Auto-brightness feature using ambient light sensor
• Scheduled on/off times
• Four configurable option LEDs for status display*

(* - requires HomeAssistant)

Network & Integration

• Initial WiFi setup via STA (Access-Point) mode
• Home Assistant integration via MQTT
  • Auto-discovery of device in Home Assistant
  • Configurable MQTT settings
    • Host/IP address
    • Port
    • Username/Password (optional)
    • Custom topic prefix

Time

• Manual and automatic time via web interface

System

• Over-the-air (OTA) firmware updates
• Device reset