THe DePLoymeNT oF SeNSor NeTWorkS

The reasons for such failures can be manifold, including hardware problems (e.g., condensing humidity causing short circuits in a sensor), software bugs (e.g., timing problems that cause the microcontroller to reboot frequently), and networking problems (e.g., communicating nodes fail to wake up concurrently due to excessive clock drift caused by extreme temperature variations). Unfortunately, these problems are often not encountered during predeployment tests, because the environmental conditions that trigger these problems are hard to simulate in the lab.