Motes are micro-sensors that can be designed to accomplish a variety of functions.
These minute sensors are achieve a high level of sophistication. Micro-scalar architecture integrates an entire system, including an OS into a footprint currently just over one centimeter – with half that size not far on the horizon. This is all packed into as small a footprint as possible, and made to last as long as possible. The package contains memory, power (battery, solar cells, energy harvesting) and a wireless transmitter (protocols might be Bluetooth, or perhaps some as-yet-to-be developed wireless platform).