import time
import os

# Function to read temperature from DS18B20 sensor
def read_temp():
    sensor_file = '/sys/bus/w1/devices/28-*/w1_slave'
    sensor_files = glob.glob(sensor_file)
    for file in sensor_files:
        with open(file, 'r') as f:
            lines = f.readlines()
        if lines[0].strip()[-3:] == 'YES':
            equals_pos = lines[1].find('t=')
            if equals_pos != -1:
                temp_string = lines[1][equals_pos+2:]
                temp_c = float(temp_string) / 1000.0
                return temp_c
    return None

# Main function
def main():
    threshold_temp = 5.0  # Set threshold temperature for spoilage (in Celsius)
    
    while True:
        temp = read_temp()
        
        if temp is not None:
            print("Current Temperature: {:.2f} °C".format(temp))
            
            # Check if temperature exceeds threshold
            if temp > threshold_temp:
                print("Warning: Food may be spoiled!")
        
        time.sleep(10)

if __name__ == '__main__':
    main()