• 树莓派上传数据错误一例


    首先是源码:

      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('
    ')
    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()

    错误故障:

     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',))

    根据错误提示

    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

    在网上找到以下几个点:

    1. requests 模块太老,须升级:

    pip install --upgrade requests

    2. 连接数太多,没有释放:

    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
    

    3. 加代理服务器:

    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})  

    分析:

    因为是自建的网站,所以排除封锁IP的可能,所以代理服务器方法不用尝试。

    尝试方法1和2,看后续效果。

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  • 原文地址:https://www.cnblogs.com/keepee/p/9644551.html
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