Question

我需要将我的传感器数据更新为thingspeak，所以我正在使用python的thingpeak库。两天前它工作正常，但现在它不起作用，连接超时，我也试图用urllib2更新它，也没有＆＃39;工作

我的网络连接很好，我可以在Pi上打开网页，我可以使用thingspeak库和urllib2从笔记本电脑更新频道。有人可以帮助我。

我的代码与thingspeak库：

node = False
channel_id = ""
write = ""
if data['MAC'] in ':ab:35':
 channel_id = "XXXXX"
 write = "XXXXXXXXXXX"
 node = True

if node:
 channel = thingspeak.Channel(id=channel_id,write_key=write)
 try :
     response=channel.update({1:data['TEMP'],2:data['VOLT'],3:data['PRES'],4:data['HUM']})
    print response
    print 'Thingspeak updated!!!'
 except :
    print "connection failed"

当我尝试urllib2时：

f = urllib2.urlopen(url)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python2.7/urllib2.py", line 154, in urlopen
    return opener.open(url, data, timeout)
  File "/usr/lib/python2.7/urllib2.py", line 431, in open
  response = self._open(req, data)
  File "/usr/lib/python2.7/urllib2.py", line 449, in _open
  '_open', req)
  File "/usr/lib/python2.7/urllib2.py", line 409, in _call_chain
  result = func(*args)
  File "/usr/lib/python2.7/urllib2.py", line 1240, in https_open
  context=self._context)
  File "/usr/lib/python2.7/urllib2.py", line 1197, in do_open
  raise URLError(err)
  urllib2.URLError: <urlopen error [Errno 110] Connection timed out>

当我尝试使用thingpeak库时：

>>> channel = thingspeak.Channel(id=c,write_key=w)
>>> res = channel.update({1:50,2:30,3:70,4:20})
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "build/bdist.linux-armv7l/egg/thingspeak/thingspeak.py", line 116,         in update
  File "/usr/lib/python2.7/dist-packages/requests/api.py", line 94, in post
    return request('post', url, data=data, json=json, **kwargs)
  File "/usr/lib/python2.7/dist-packages/requests/api.py", line 49, in request
    return session.request(method=method, url=url, **kwargs)
  File "/usr/lib/python2.7/dist-packages/requests/sessions.py", line 457, in request
    resp = self.send(prep, **send_kwargs)
  File "/usr/lib/python2.7/dist-packages/requests/sessions.py", line 569, in send
    r = adapter.send(request, **kwargs)
  File "/usr/lib/python2.7/dist-packages/requests/adapters.py", line 407, in send
    raise ConnectionError(err, request=request)

requests.exceptions.ConnectionError :(＆＃39;连接已中止。＆＃39;，错误（110，＆＃39;连接超时＆＃39;）

Answer 1

我正在使用raspberry-pi将数据发送到thingspeak。我做的是这样的：

import httplib
import urllib

    #Preparing to send the information to the cloud
            params=urllib.urlencode({'field1':liters,'key':key})
            headers={"Content-typZZe": "application/x-www-form-urlencoded","Accept":"text/plain"}
            conn=httplib.HTTPConnection("api.thingspeak.com:80")

    #Sending the data to the thingspeak platform
            try:
                    conn.request("POST", "/update", params, headers)
                    response=conn.getresponse()
                    print response.status, response.reason
                    data=response.read()
                    conn.close()
            except:
                    print "connection failed"

它运作得很好。密钥是您的频道密钥的字符串。

希望它有所帮助。

Answer 2

如果我使用SSH并尝试运行脚本，则可以正常运行。

Answer 3

通过创建Request对象＆amp;添加新的User-Agent。使用它们作为urlopen的参数：

import urllib2

request = urllib2.Request('http://www.example.com/')
request.add_header('User-agent', 'Mozilla/5.0 (Linux i686)')

response = urllib2.urlopen(request)

raspberry pi无法发出任何网址请求，连接超时

3 个答案: