1  import board
  2  import busio
  3  from digitalio import DigitalInOut
  4  from adafruit_wiznet5k.adafruit_wiznet5k import WIZNET5K
  5  import adafruit_wiznet5k.adafruit_wiznet5k_socket as socket
  6  import adafruit_requests as requests
  7  
  8  cs = DigitalInOut(board.D10)
  9  spi_bus = busio.SPI(board.SCK, MOSI=board.MOSI, MISO=board.MISO)
 10  
 11  # Initialize ethernet interface with DHCP
 12  eth = WIZNET5K(spi_bus, cs)
 13  
 14  # Initialize a requests object with a socket and ethernet interface
 15  requests.set_socket(socket, eth)
 16  
 17  TEXT_URL = "http://wifitest.adafruit.com/testwifi/index.html"
 18  JSON_GET_URL = "http://httpbin.org/get"
 19  JSON_POST_URL = "http://httpbin.org/post"
 20  
 21  attempts = 3  # Number of attempts to retry each request
 22  failure_count = 0
 23  response = None
 24  
 25  print("Fetching text from %s" % TEXT_URL)
 26  while not response:
 27      try:
 28          response = requests.get(TEXT_URL)
 29          failure_count = 0
 30      except AssertionError as error:
 31          print("Request failed, retrying...\n", error)
 32          failure_count += 1
 33          if failure_count >= attempts:
 34              raise AssertionError(
 35                  "Failed to resolve hostname, \
 36                                    please check your router's DNS configuration."
 37              ) from error
 38          continue
 39  print("-" * 40)
 40  
 41  print("Text Response: ", response.text)
 42  print("-" * 40)
 43  response.close()
 44  response = None
 45  
 46  print("Fetching JSON data from %s" % JSON_GET_URL)
 47  while not response:
 48      try:
 49          response = requests.get(JSON_GET_URL)
 50          failure_count = 0
 51      except AssertionError as error:
 52          print("Request failed, retrying...\n", error)
 53          failure_count += 1
 54          if failure_count >= attempts:
 55              raise AssertionError(
 56                  "Failed to resolve hostname, \
 57                                    please check your router's DNS configuration."
 58              ) from error
 59          continue
 60  print("-" * 40)
 61  
 62  print("JSON Response: ", response.json())
 63  print("-" * 40)
 64  response.close()
 65  response = None
 66  
 67  data = "31F"
 68  print("POSTing data to {0}: {1}".format(JSON_POST_URL, data))
 69  while not response:
 70      try:
 71          response = requests.post(JSON_POST_URL, data=data)
 72          failure_count = 0
 73      except AssertionError as error:
 74          print("Request failed, retrying...\n", error)
 75          failure_count += 1
 76          if failure_count >= attempts:
 77              raise AssertionError(
 78                  "Failed to resolve hostname, \
 79                                    please check your router's DNS configuration."
 80              ) from error
 81          continue
 82  print("-" * 40)
 83  
 84  json_resp = response.json()
 85  # Parse out the 'data' key from json_resp dict.
 86  print("Data received from server:", json_resp["data"])
 87  print("-" * 40)
 88  response.close()
 89  response = None
 90  
 91  json_data = {"Date": "July 25, 2019"}
 92  print("POSTing data to {0}: {1}".format(JSON_POST_URL, json_data))
 93  while not response:
 94      try:
 95          response = requests.post(JSON_POST_URL, json=json_data)
 96          failure_count = 0
 97      except AssertionError as error:
 98          print("Request failed, retrying...\n", error)
 99          failure_count += 1
100          if failure_count >= attempts:
101              raise AssertionError(
102                  "Failed to resolve hostname, \
103                                    please check your router's DNS configuration."
104              ) from error
105          continue
106  print("-" * 40)
107  
108  json_resp = response.json()
109  # Parse out the 'json' key from json_resp dict.
110  print("JSON Data received from server:", json_resp["json"])
111  print("-" * 40)
112  response.close()