树莓派上传数据错误一例

  1 # -*- utf-8 -*-
  2 #env !/usr/bin/python
  3 
  4 import RPi.GPIO as GPIO
  5 import time
  6 import json
  7 import datetime
  8 import requests
  9 
 10 requests.adapters.DEFAULT_RETRIES = 5
 11 # s = requests.session()
 12 # s.keep_alive = False
 13 apiurl = 'https://xxxxxx.cn/api/TmpApi'
 14 apiheaders = {'Content-Type': 'application/json','Connection': 'close'}
 15 
 16 def getCPUTemp():
 17     file = open("/sys/class/thermal/thermal_zone0/temp")
 18     cpuTemp=float(file.read())/1000
 19     file.close()
 20     return cpuTemp
 21 
 22 def getTemp():
 23     channel = 17
 24     data = []
 25     j = 0
 26 
 27     GPIO.setmode(GPIO.BCM)
 28 
 29     time.sleep(1)
 30 
 31     GPIO.setup(channel, GPIO.OUT)
 32 
 33     GPIO.output(channel, GPIO.LOW)
 34     time.sleep(0.02)
 35     GPIO.output(channel, GPIO.HIGH)
 36 
 37     GPIO.setup(channel, GPIO.IN)
 38 
 39     while GPIO.input(channel) == GPIO.LOW:
 40         continue
 41 
 42     while GPIO.input(channel) == GPIO.HIGH:
 43         continue
 44 
 45     while j < 40:
 46         k = 0
 47         while GPIO.input(channel) == GPIO.LOW:
 48             continue
 49     
 50         while GPIO.input(channel) == GPIO.HIGH:
 51             k += 1
 52             if k > 100:
 53                 break
 54     
 55         if k < 8:
 56             data.append(0)
 57         else:
 58             data.append(1)
 59 
 60         j += 1
 61 
 62     print("sensor is working.")
 63     # print(data)
 64 
 65     humidity_bit = data[0:8]
 66     humidity_point_bit = data[8:16]
 67     temperature_bit = data[16:24]
 68     temperature_point_bit = data[24:32]
 69     check_bit = data[32:40]
 70 
 71     humidity = 0
 72     humidity_point = 0
 73     temperature = 0
 74     temperature_point = 0
 75     check = 0
 76     
 77     cpu_temperature = 0
 78 
 79     for i in range(8):
 80         humidity += humidity_bit[i] * 2 ** (7 - i)
 81         humidity_point += humidity_point_bit[i] * 2 ** (7 - i)
 82         temperature += temperature_bit[i] * 2 ** (7 - i)
 83         temperature_point += temperature_point_bit[i] * 2 ** (7 - i)
 84         check += check_bit[i] * 2 ** (7 - i)
 85 
 86     tmp = humidity + humidity_point + temperature + temperature_point
 87 
 88     csv=open('/home/pi/Desktop/Projects/DHT11/log.csv', 'a+')
 89     if humidity>99:
 90         return "Wrong data"
 91     if check == tmp:
 92         print("temperature : ", temperature, ", humidity : " , humidity)
 93         cpu_temperature = getCPUTemp()
 94         print("CPU Temperature : ", cpu_temperature)
 95 
 96         CurTime = datetime.datetime.now()
 97         payload = {'DeviceName':"DHT11a",'Temp':temperature,'Humidity':humidity,'AcquisitionTime':CurTime.isoformat(), 'Memo': 'cpu:%.3f' % cpu_temperature}
 98         print("Current time: %s" % CurTime.isoformat())
 99         print("Upload Temperature: %.3f" % temperature,"Humdity: %.3f" % humidity)
100 
101         jdata = json.dumps(payload)
102 
103         r=requests.post(apiurl,headers=apiheaders,data=json.dumps(payload))
104 
105         csv.write(time.strftime("%Y/%m/%d %H:%M:%S",time.localtime()) + ",")
106         csv.write(str(temperature))
107         csv.write(',')
108         csv.write(str(humidity))
109         csv.write('\n')
110     else:
111         # print("wrong")
112         r = "wrong"
113         print("temperature : ", temperature, ", humidity : " , humidity, " check : ", check, " tmp : ", tmp)
114 
115     csv.close()
116 
117     return r
118 
119 if __name__ == "__main__":
120     try:
121         while 1:
122             resp = getTemp()
123             print("xxxxxx.cn request result:  %s" %resp)
124             time.sleep(60)
125     finally:
126         GPIO.cleanup()

 1 sensor is working.
 2 temperature :  24 , humidity :  44
 3 CPU Temperature :  47.236
 4 Current time: 2018-09-14T04:37:06.303399
 5 Upload Temperature: 24.000 Humdity: 44.000
 6 xxxxxx.cn request result:  <Response [201]>
 7 sensor is working.
 8 temperature :  16 , humidity :  50  check :  161  tmp :  78
 9 xxxxxx.cn request result:  wrong
10 sensor is working.
11 temperature :  24 , humidity :  55
12 CPU Temperature :  46.698
13 Current time: 2018-09-14T04:39:08.722444
14 Upload Temperature: 24.000 Humdity: 55.000
15 Traceback (most recent call last):
16   File "/usr/lib/python3/dist-packages/urllib3/connection.py", line 138, in _new_conn
17     (self.host, self.port), self.timeout, **extra_kw)
18   File "/usr/lib/python3/dist-packages/urllib3/util/connection.py", line 75, in create_connection
19     for res in socket.getaddrinfo(host, port, family, socket.SOCK_STREAM):
20   File "/usr/lib/python3.5/socket.py", line 733, in getaddrinfo
21     for res in _socket.getaddrinfo(host, port, family, type, proto, flags):
22 socket.gaierror: [Errno -3] Temporary failure in name resolution
23 
24 During handling of the above exception, another exception occurred:
25 
26 Traceback (most recent call last):
27   File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 594, in urlopen
28     chunked=chunked)
29   File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 350, in _make_request
30     self._validate_conn(conn)
31   File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 837, in _validate_conn
32     conn.connect()
33   File "/usr/lib/python3/dist-packages/urllib3/connection.py", line 281, in connect
34     conn = self._new_conn()
35   File "/usr/lib/python3/dist-packages/urllib3/connection.py", line 147, in _new_conn
36     self, "Failed to establish a new connection: %s" % e)
37 requests.packages.urllib3.exceptions.NewConnectionError: <requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x75aa01b0>: Failed to establish a new connection: [Errno -3] Temporary failure in name resolution
38 
39 During handling of the above exception, another exception occurred:
40 
41 Traceback (most recent call last):
42   File "/usr/lib/python3/dist-packages/requests/adapters.py", line 423, in send
43     timeout=timeout
44   File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 643, in urlopen
45     _stacktrace=sys.exc_info()[2])
46   File "/usr/lib/python3/dist-packages/urllib3/util/retry.py", line 363, in increment
47     raise MaxRetryError(_pool, url, error or ResponseError(cause))
48 requests.packages.urllib3.exceptions.MaxRetryError: HTTPSConnectionPool(host='xxxxxx.cn', port=443): Max retries exceeded with url: /api/TmpApi (Caused by NewConnectionError('<requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x75aa01b0>: Failed to establish a new connection: [Errno -3] Temporary failure in name resolution',))
49 
50 During handling of the above exception, another exception occurred:
51 
52 Traceback (most recent call last):
53   File "dht11GV.py", line 121, in <module>
54     resp = getTemp()
55   File "dht11GV.py", line 102, in getTemp
56     r=requests.post(apiurl,headers=apiheaders,data=json.dumps(payload))
57   File "/usr/lib/python3/dist-packages/requests/api.py", line 110, in post
58     return request('post', url, data=data, json=json, **kwargs)
59   File "/usr/lib/python3/dist-packages/requests/api.py", line 56, in request
60     return session.request(method=method, url=url, **kwargs)
61   File "/usr/lib/python3/dist-packages/requests/sessions.py", line 488, in request
62     resp = self.send(prep, **send_kwargs)
63   File "/usr/lib/python3/dist-packages/requests/sessions.py", line 609, in send
64     r = adapter.send(request, **kwargs)
65   File "/usr/lib/python3/dist-packages/requests/adapters.py", line 487, in send
66     raise ConnectionError(e, request=request)
67 requests.exceptions.ConnectionError: HTTPSConnectionPool(host='xxxxxx.cn', port=443): Max retries exceeded with url: /api/TmpApi (Caused by NewConnectionError('<requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x75aa01b0>: Failed to establish a new connection: [Errno -3] Temporary failure in name resolution',))

Max retries exceeded with url: /api/TmpApi (Caused by NewConnectionError('<requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x75aa01b0>: 
Failed to establish a new connection: [Errno -3] Temporary failure in name resolution

pip install --upgrade requests

解决办法：

1、增加重试连接次数

  requests.adapters.DEFAULT_RETRIES = 5

2、关闭多余的连接

requests使用了urllib3库，默认的http connection是keep-alive的，requests设置False关闭。

操作方法

s = requests.session()
  s.keep_alive = False

http://obroll.com/max-retries-exceeded-for-url-in-requests-module-python-solved/ 
A: 
Python代码 
proxy = {'http': '33.33.33.10:8118'}  
result = requests.get(url, proxies=proxy)  

B: 
Java代码
proxy = '33.33.33.11:8118'  
result = requests.get(url, proxies={'http': proxy})