Patent ID: 8816826
Filing Date: 2014-08-26
Classification: G06K,H04Q

Abstract:
1. A method comprising: receiving, using a passive RFID tag, a first radio frequency transmission including first identification data configured to identify a sender of the first radio frequency transmission; using the first radio frequency transmission to generate first electrical energy; storing the first identification data in a log data storage using the first electrical energy; receiving a second radio frequency transmission including second identification data configured to identify a sender of the second radio frequency transmission; using the second radio frequency transmission to generate second electrical energy; storing the second identification data in the log data storage using the second electrical energy; switching from a logging mode to an upload mode, where switching from the logging mode to the upload mode includes using a circuit to change a state value stored in a static storage location, the state value being a digital value indicative of the logging mode; and uploading the first identification data and the second identification data stored in the log data storage, in the upload mode.