US Patent 11381271 Energy harvesting sensor device with wireless communication

A device is provided that includes a logic processor, a power storage cell, a sensor, a wireless logic and a power source. The power source is configured to harvest power in response to exposure to radio frequency (RF) energy using an antenna element of the device. The harvested power is transferred to the power storage cell such that when the power storage cell has a usable amount of power the logic processor (a) samples data using the sensor, (b) processes the sample data into a message that is encrypted, and (c) transmits the message using the wireless logic to an end node that is configured to receive the message from the device. When usable amount of power is not present in the power storage cell during any one of (a)-(c), data is saved in persistent memory until additional harvested power is present in the power storage cell.