Concepts of IoTHub data on Event Hub
If your only requirement is to send data in one way from the device to the cloud, Event Hubs can do the job very well. IoT Hubs are built on top of Event Hubs and offer additional functionality like cloud-to-device messages.
The older Service Bus SDK is indeed incompatible with Universal App Platform as you noticed. But we have a newer library now: https://docs.microsoft.com/en-us/azure/event-hubs/event-hubs-dotnet-standard-getstarted-send.
Using the Microsoft.Azure.EventHubs package on the device end you should be able to send messages to the Event Hub.