最近在openwrt上安装python时，老出现/overlay空间不足的错误，如下图所示：
不过用命令查看时，其空间确实挺小的：
看了这篇文章之后，想到了用闪存卡来扩容。由于我的系统内部已经有了相关usb驱动模块，所以一插上闪存卡就能识别了
基本想法很简单，先格式化，再挂载，再配置opkg.conf使软件安装到其上。
import httplib
import urllib
import time
import random
url_platform = '11.4.31.195:9071'
path = '/WIFPa/ResourceData.xml/000100003f0cfd4a?ResourceID=1'
path_uploadservicedata = '/WIFPd/UploadServiceData/000100003f0cfd4a'
FORMAT = '%Y-%m-%dT%X'
params_xml1 = '<ServiceData><mwid>000100003f0cfd4a</mwid><datatime>' +time.strftime(FORMAT,time.localtime()) + '</datatime><Datapoints><value>'
params_xml2 = '</value><num>1</num></Datapoints></ServiceData>'
header = {'Content-type':'text/xml'}
# conn.request(method='GET',url=path)
# while True:
conn = httplib.HTTPConnection(url_platform)
val = str(random.randint(1,100))
print 'value',val
params_xml = params_xml1 + val + params_xml2
conn.request('POST',path_uploadservicedata,params_xml,header)
resp = conn.getresponse()
print resp.status,resp.reason
# htmldata = resp.read()
# print htmldata
# time.sleep(5)
参考链接
http://wiki.openwrt.org/doc/techref/filesystems?s[]=filesystem
http://blog.csdn.net/jk110333/article/details/11920163
http://wiki.openwrt.org/doc/techref/flash.layout
原文地址：http://blog.csdn.net/baiwfg2/article/details/41518459
