Firearm monitoring and energy harvesting from a local electromagnetic signal

A firearm for firearm usage monitoring, the firearm comprising:

• a battery configured to power components of the firearm;
• a communication interface configured to transmit data wirelessly to a connected device;
• and
• a controller operatively coupled to a communication interface, the controller running application software configured to:
• power, via the battery, the components of the firearm in a first sensing mode;
• monitor, via the communication interface, density of electromagnetic radiation proximate the firearm;
• harvest, in response to the electromagnetic radiation density exceeding a predetermined threshold, power from the electromagnetic radiation via a wireless-energy harvesting mechanism having a receiving antenna configured to receive a local electromagnetic signal, a rectifier configured to convert the received signal to direct current, and a DC-DC converter configured to alter voltage of the direct current to a desired voltage;
• and
• operate, via the harvested power, the components of the firearm in a second sensing mode, the second sensing mode expending more energy than the first sensing mode.