Disclosed are electronic padlocks and related methods. An electronic padlock includes a lock body, a shank, and a locking mechanism operably coupled to electronic circuitry configured to detect physical interactions of a user with the shank and control the locking mechanism. A method of operating the electronic padlock includes detecting physical interactions of a user with a shank of an electronic padlock, comparing the detected physical interactions with a stored predetermined series of physical interactions, and transitioning from a locked state to an unlocked state responsive to determining that the detected physical interactions match the predetermined series of physical interactions. A method of transforming a mobile device into a device configured to interface with an electronic padlock includes distributing computer-readable instructions configured to instruct one or more processors of the mobile device to display a graphical user interface configured to enable a user to alter settings of the electronic padlock.