Python code for iot hub function app

import time
import json
import asyncio
from azure.iot.device import IoTHubDeviceClient

# Define your connection string
CONNECTION_STRING = "<YOUR_DEVICE_CONNECTION_STRING>"

# The method to send data (called every 20 minutes)
async def send_to_iot_hub_method(client, data):
    try:
        # Send the message using the shared client instance
        await client.send_message(data)
        print("Message sent to IoT Hub:", data)
    except Exception as e:
        print(f"Error sending message: {e}")

# The main function
def main():
    print("Starting the IoT Hub Python sample...")
    
    # 1. Initialize the client in the main method
    client = IoTHubDeviceClient.create_from_connection_string(CONNECTION_STRING)
    
    print("Waiting for commands, press Ctrl-C to exit")
    
    try:
        # Connect the client
        asyncio.run(client.connect())
        
        # Main program loop
        while True:
            # Generate data (example)
            temperature = 25 # your data generation logic here
            data = json.dumps({"temperature": temperature})
            
            # Call the send method within the loop
            asyncio.run(send_to_iot_hub_method(client, data))
            
            # Sleep for 20 minutes (1200 seconds)
            time.sleep(1200)

    except KeyboardInterrupt:
        print("IoTHubDeviceClient sample stopped by user")
        
    finally:
        # 2. Shut down the client in the finally block for a graceful exit
        print("Shutting down IoT Hub Client")
        asyncio.run(client.shutdown()) # Use await client.shutdown() in an async context

if __name__ == '__main__':
    main()