⚙️ Key Features
⏰ Tracks:
Seconds, Minutes, Hours
Day, Date, Month, Year
🔋 Battery backup support
🔌 I2C communication (SDA / SCL)
⚡ Ultra-low power consumption (~0.25µA)
⏱️ Built-in:
Alarm
Timer
Clock output
🔄 Supports 12-hour and 24-hour formats
📅 Automatic leap year correction
🔌 Pinout
Pin
Function
VCC
3.3V or 5V
GND
Ground
SDA
I2C Data
SCL
I2C Clock
INT
Interrupt (optional)
CLK / COT
Clock output
🔧 Wiring
Arduino UNO:
SDA → A4
SCL → A5
ESP32:
SDA → GPIO 21
SCL → GPIO 22
