Systems and methods are provided for firearm monitoring, including a server device running application software that receives signals from firearms regarding usage thereof and a controller running application software configured to communicate with a connected device via a communication interface, detect a jamming signal that inhibits communication with the connected device, stop, in response to detecting the jamming signal, communication with the connected device, and harvest, in response to detecting the jamming signal, power from the jamming signal via a wireless-energy harvesting mechanism having a receiving antenna configured to receive the jamming 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.