Abstract: A radio frequency locator system and method. First, second and third reference devices are operable to transmit a plurality of spread spectrum chirp signals frequency offset from one another. An object device is operable to receive the plurality of spread spectrum chirp signals, the object device is further operable to evaluate the received plurality of spread spectrum chirp signals for relative phase shifts between the plurality of spread spectrum chirp signals and derive a fine propagation time between the reference devices and the object device using the phase shifts between the spread spectrum chirp signals. The reference devices determine their location independent of the object device and determine the location of the object device as a function of each of their locations and of their range to the object device.

Abstract: A lock, such as a padlock or a door lock, having radio frequency identification (RFID) and/or Bluetooth capabilities is disclosed. The control system in the lock may obtain identifying information from a user device presented close to the lock, and operates an actuator to unlock the lock based on the identifying information. The lock may include both an RFID reader and a Bluetooth system in a single device, and may automatically lock and unlock the lock by detecting a presence or an absence of a user device near the lock. At least a portion of a front face of the lock may be made of non-metallic material. The lock may include an indicator for indicating a power-on state, a Bluetooth connection status, a locked or unlocked status, and/or a low-battery state.

Abstract: A radio frequency locator system and method. First, second and third reference devices are operable to transmit a plurality of spread spectrum chirp signals frequency offset from one another. An object device is operable to receive the plurality of spread spectrum chirp signals, the object device is further operable to evaluate the received plurality of spread spectrum chirp signals for relative phase shifts between the plurality of spread spectrum chirp signals and derive a fine propagation time between the reference devices and the object device using the phase shifts between the spread spectrum chirp signals. The reference devices determine their location independent of the object device and determine the location of the object device as a function of each of their locations and of their range to the object device.

Abstract: A set sleep period is coordinated among a plurality of mesh network nodes to conserve power, and a temporarily reduced sleep period is coordinated among the plurality of nodes to facilitate mesh network node service or installation activity. The reduced sleep period comprises scheduling a period of time during which the sleep period is reduced, or reverting from the temporarily reduced sleep period to the original set sleep period after predetermined period of time. Temporarily reducing the sleep period includes distributing a message throughout the mesh network when the mesh network nodes are awake.

Abstract: A set sleep period is coordinated among a plurality of mesh network nodes to conserve power, and a temporarily reduced sleep period is coordinated among the plurality of nodes to facilitate mesh network node service or installation activity. The reduced sleep period comprises scheduling a period of time during which the sleep period is reduced, or reverting from the temporarily reduced sleep period to the original set sleep period after predetermined period of time. Temporarily reducing the sleep period includes distributing a message throughout the mesh network when the mesh network nodes are awake.