Send telemetry message to IOT hub through message routing and consume message by logic app

Following are the steps

1. Create an Event Hubs namespace  in your azure account.
2. After creating namespace Create an event hub. Use this link to create Event Hubs Namespace and Event Hub. https://docs.microsoft.com/en-us/azure/event-hubs/event-hubs-create
3. Create IOT hub in your azure account . Use this link https://docs.microsoft.com/en-us/azure/iot-hub/iot-hub-create-through-portal for creating IOT HUB
4. Create a Message Routing for IOT Hub. For that go to your IOT Hub
5. Select Message Routing
   
   
   
   
   
   
   
6. You will get the following screen. Click on add
   
   
   
   
   
   
   
7. You will get following screen
   
   
   
   
   
   
8. Enter the Name of route
9. For EndPoint click on Add endpoint and select Event hubs
   
   
   
   
   
   
10. You will get the following screen
    
    
    
    
    
    
11. Enter the name of End Point name
12. Click on Choose an existing event hub
13. After that select your IOT hub name space and IOT hub instance
14. After that click on create
15. Write a C# code that will create device and send telemetry message to your device.(refer Create IOT Device and send Telemetry Message to IOT Device using c#)
16. Create a http trigger azure function. (refer How to create HttpTrigger Function using .Net)
17. After that Create a logic app for that go to azure portal
18. Select logic Apps. You will get the following screen click on Add
    
    
    
    
    
    
19. You will get the following screen
    
    
    
    
    
20. Fill all the necessary details and click on create
21. After that you will get the following screen
    
    
    
    
    
    
22. Click on Go to resource. You will get the following screen
    
    
    
    
    
23. Click on blank Logic app
24. You will get the following screen and search for event hub and select event hub trigger
    
    
    
    
    
25. You will get the following screen
    
    
    
    
    
26. Fill all the necessary details. You can change the connection of event hub by clicking on Change Connection
27. After that click on New Step
28. Search for azure function and select the function that you have created
29. You will get the following screen
    
    
    
    
    
30. In Request Body select the body
31. Add new parameter for header
32. In header enter the header of the function like key x-function-key   and value will be your function key
33. After that save your logic app
34. When you send telemetry data to device this logic app will be triggered
35. You can see that in run history of your logic app