A system for remote sensing includes a flexible sheet, having printed thereon electronic sensors, logic components arranged in circuits, the circuits electrically connected to the sensors, memory electrically connected to the circuits, energy harvesting components electrically connected to the circuits, and a communications interface. The system includes a remote reader, the reader having at least one energy broadcast component to broadcast energy to the energy harvesting components, and an interface to allow the reader to access data from the sensors. A sensor network includes a flexible sheet, electronic sensors printed on the flexible sheet, logic components arranged in circuits, the circuits electrically connected to the sensors, memory electrically connected to the circuits. energy harvesting components electrically connected to the circuits, and a communications interface.