#coding=utf8
#!/usr/bin/env python
import time
import json
import urllib
import urllib2
import sys

def DS18B20(name):
    tfile = open("/sys/bus/w1/devices/%s/w1_slave" %name) 
    #读取文件所有内容
    text = tfile.read()
    #关闭文件
    tfile.close()
    #用换行符分割字符串成数组，并取第二行
    secondline = text.split("\n")[1]
    #用空格分割字符串成数组，并取最后一个，即t=23000
    temperaturedata = secondline.split(" ")[9]
    #取t=后面的数值，并转换为浮点型
    temperature = float(temperaturedata[2:])
    #转换单位为摄氏度
    temperature = temperature / 1000
    return temperature
 
def update(name):
    temp_value = DS18B20(name)
    if(temp_value<50):
        temp_str = str(temp_value)
        url = 'http://api.yeelink.net/v1.0/device/1000/sensor/1000/datapoints'
        values = json.dumps({"value":temp_str})
        headers = {'U-ApiKey':'123456abcdef'}
        req = urllib2.Request(url, values, headers)
        urllib2.urlopen(req)
        return temp_str
    else:
        return ""
       
if __name__ == '__main__':
    name = sys.argv[1]
    while True:
        temp = update(name)
        if(temp):
            print '成功 ' + temp
        time.sleep(20)