#!/usr/bin/env python
import os
import glob
import time
import sys

os.system('modprobe w1-gpio')
os.system('modprobe w1-therm')

base_dir = '/sys/bus/w1/devices/'
device_folder = glob.glob(base_dir + '28*')[0]
device_file = device_folder + '/w1_slave'

def read_temp_raw():
 f = open(device_file, 'r')
 lines = f.readlines()
 f.close()
 return lines

def read_temp():
 lines = read_temp_raw()
 while lines[0].strip()[-3:] != 'YES':
 time.sleep(0.2)
 lines = read_temp_raw()
 equals_pos = lines[1].find('t=')
 if equals_pos != -1:
 temp_string = lines[1][equals_pos+2:]
 temp_c = float(temp_string) / 1000.0
 temp_f = temp_c * 9.0 / 5.0 + 32.0
 return temp_c, temp_f

try:
 while True:
 print(read_temp()[0])
 time.sleep(0.3)
except KeyboardInterrupt:
 sys.exit(0)