Patent ID: 8836475

Claim:
A monitoring device configured to monitor cargo, the monitoring device comprising: a key fob interface configured to: communicate with an external key fob configured to temporarily interface with the monitoring device by providing the monitoring device with action data indicative of an action to be performed and a serial number that indicates a key fob credential status; and generate a wake up signal when communicating with a key fob; a memory configured to store a serial number list that includes at least one valid serial number associated with one or more key fobs permitted to interface with the monitoring device; a processing unit coupled to the key fob interface and the memory, the processing unit configured to: receive a wakeup signal generated by the key fob interface, access, via the key fob interface, a serial number and action data provided by a key fob; determine whether a serial number provided by a key fob is valid or invalid by reviewing the serial number list; and control the monitoring device in accordance with accessed action data in response to determining that a serial number provided by a key fob is valid.