Before revision: History Although wireless sensor nodes have existed for decades and used for applications as diverse as earthquake measurements to warfare, the modern development of small sensor nodes dates back to the 1998 Smartdust projectSmart Dust and the NASA Sensor Webs ref>NASA Tech Brief </ref> One of the objectives of the Smartdust project was to create autonomous sensing and communication within a cubic millimeter of space.
After revision: History Although wireless sensor nodes have existed for decades and used for applications as diverse as earthquake measurements to warfare, the modern development of small sensor nodes dates back to the 1998 Smartdust projectSmart Dust and the NASA Sensor WebNASA Tech Brief One of the objectives of the Smartdust project was to create autonomous sensing and communication within a cubic millimeter of space.