For starters, you need to consider how each sensor will share the data it collects. Will it be wireless? Will it talk to a gateway, or direct to a more substantial server. How will you connect a gateway to your data center ? How will you secure that traffic?

And if you're running thousands or millions of sensors, how will you handle the torrent of data they all produce?

Needs operating system designed to run sensors, or integrate them. Suitable for all sorts of sensors in the home, cars, and manufacturing applications, powering IoT applications like smart parking, smart lighting and smart metering and many others.