**Abstract**

In the 20th century, computers were senseless brains, but today, thanks to sensor networks, they can feel things for themselves. This major trend has given rise to many wireless sensor networks with the ability to sense the environment, deliver findings and process those data appropriately. Within this trend, this chapter outlines deployment and routing strategies as well as data handling practices. For convenience, the most encompassing application to consider is that of event detection.

**Keywords:** IoT, LLN, WSN, sensing, coverage, connectivity, deployment, routing, data fusion, machine learning
