upload NK server code

SERVER_CODE/event_hub_listener.py

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+import logging
+import json
+import donwlink_message
+import asyncio
+from azure.eventhub import EventHubConsumerClient
+
+connection_str = "Endpoint=sb://ihsuprodamres091dednamespace.servicebus.windows.net/;SharedAccessKeyName=iothubowner;SharedAccessKey=v0auIwbmqfBDz3BY8aZtbnOzg8+6119LWylk1Jq1G0A=;EntityPath=iothub-ehub-agrihub-3199035-0595c5c32a"
+consumer_group = '$Default'
+eventhub_name = 'iothub-ehub-agrihub-3199035-0595c5c32a'
+client = EventHubConsumerClient.from_connection_string(connection_str, consumer_group, eventhub_name=eventhub_name)
+logger = logging.getLogger("azure.eventhub")
+logging.basicConfig(level=logging.INFO)
+
+def background(f):
+    def wrapped(*args, **kwargs):
+        return asyncio.get_event_loop().run_in_executor(None, f, *args, *kwargs)
+    return wrapped
+
+def on_event(partition_context, event):
+    #logger.info("Received event from partition {}".format(partition_context.partition_id))
+    #print("PartitionContext:  ", partition_context)
+    partition_context.update_checkpoint(event)
+    #print(event)
+    print("JSON: -->",event.body_as_json(encoding='UTF-8'))
+    message_arrrived = event.body_as_json(encoding='UTF-8')
+    if message_arrrived["st"] > 5:
+        request_sample()
+
+@background
+def request_sample():
+    donwlink_message.send_to_device("RequestAudioSample")
+
+def start_event_hub_listener():
+    client.receive( on_event=on_event, partition_id="0")