from machine import Pin, I2C
import time

# Initialize I2C
i2c = I2C(0, scl=Pin(22), sda=Pin(21), freq=100000)

# DS3231 I2C address
DS3231_ADDR = 0x68

def read_byte(register):
    return i2c.readfrom_mem(DS3231_ADDR, register, 1)[0]

def read_time():
    second = read_byte(0x00)
    minute = read_byte(0x01)
    hour = read_byte(0x02)
    return hour, minute, second

def bcd_to_dec(bcd):
    return (bcd >> 4) * 10 + (bcd & 0x0F)

while True:
    hour, minute, second = read_time()
    hour = bcd_to_dec(hour)
    minute = bcd_to_dec(minute)
    second = bcd_to_dec(second)
    
    print(f"Time: {hour:02}:{minute:02}:{second:02}")
    time.sleep(1)