Recently created a demo application to generate sample humidity and temperature values.  The data is sent to IoT Hub in Azure, then the data is sent to a data stream and finally the data is visualized with PowerBI.

https://app.powerbi.com/view?r=eyJrIjoiNzU4ODQ1OWItM2U0OC00MzZkLThiOWYtYzhjMTc3MDBlY2FiIiwidCI6ImJlY2FiOTFlLTc3YzctNGYxZi05MzUxLThkZjNhZWZiY2Y5NyIsImMiOjF9