It is a major problem facing by every new IoT analytics solution. The datasets are available but with big companies, but they are not willing to share it so easily.
But you can visit Linked Sensor Data (Kno.e.sis) - but it is only related to weather data.
Tools like IoT application Development and Simulation help you solve these problems by modeling synthetic datasets.
Also visit:
https://www.kaggle.com/uciml/biomechanical-features-of-orthopedic-patients ..But I found this link is useful..