Abstract: A locker system for parcel deposit and pick-up, comprising a parcel locker bank constituted of at least one autonomous compartments cluster including at least one compartment equipped with a door and including a locking module, which electronically controls locking and unlocking of the door, and a mobile device configured to establish a local communication with the locking module via a short-distance communication, wherein the locking module comprises: an energy management module configured for managing transitions of energy states and allowing the at least one autonomous compartments cluster to be run in a very low energy state or in a low energy state and regularly allowing a partial wake-up from the very low energy state to the low energy state, a broadcasting timer for triggering a transition from a very low energy state to a low energy state, a radio transceiver module equipped with an antenna, and at least one processor running a firmware configured for, while in the very low energy state or in the low