MIT Technology Review lists sensor networks as one of “Ten Emerging Technologies That Will Change the World” [1]. This paper describes three lab exercises that are suitable for activity-driven teaching of sensor networks to undergraduate students. The exercises are derived from the TinyOS tutorial, and MicaZ motes were used. The first exercise is about uploading a simple blink program to one mo...

The core motivations of deploying a sensor network for a specific application come from the autonomy of sensors, their reduced size, and their capabilities for computing and communicating in a short range. However, many challenges for sensor networks still exist: minimizing energy consumptions, and ensuring the performance of communication that may be affected by many parameters. The work descr...

In this paper four wireless sensor network operating systems are compared in terms of power consumption. The analysis takes into account the most common operating systems--TinyOS v1.0, TinyOS v2.0, Mantis and Contiki--running on Tmote Sky and MICAz devices. With the objective of ensuring a fair evaluation, a benchmark composed of four applications has been developed, covering the most typical t...

Embedded wireless networks are increasingly applied across a range of application domains. When the nodes that form these networks provide sensing capabilities, a new system class emerges — one that fundamentally changes the way we monitor our crops, protect our forests, patrol our borders, and interact with the world around us. Unfortunately, wireless sensor networks are notoriously difficult ...

Wireless sensor networks (sensornets) are deeply embedded, resource constrained, distributed systems. Sensornets are generally developed in an interrupt(or event-) driven programming model. Writing event-driven programs is hard. Sensornets are generally battery powered, desiring event-driven executions, for power efficiency. This thesis presents TinyThread a safe, lightweight threading model wh...

Currently, UWASN (Underwater Acoustic Sensor Network) has been researched as a branch of sensor networks. UWASNs use a transmission media different from terrestrial wireless sensor networks. That is, the former uses acoustic waves and the latter uses radio waves for communication. G/W (Gateway)s in UWASNs are nodes for relaying data transmission between a UWASN and a terrestrial wireless sensor...

The paper presents two mechanisms for designing an on-demand, reliable and efficient collection protocol for Wireless Sensor Networks. The former is the Bidirectional Link Quality Estimation, which allows nodes to easily and quickly compute the quality of a link between a pair of nodes. The latter, Hierarchical Range Sectoring, organizes sensors in different sectors based on their location with...