| 摘要 |
Method and an apparatus for giving notifications such as sound, ring-tone, vibration, e-mails, text messages, or phone calls to users when a physical item such as doors, gates, windows, cars, or household items have been moved from its original location, or has its orientation changed, comprising a tag manager connected to the Internet, and one or more sensor tags coupled to the tag manager through wireless connection. Notifications may also be given when the physical item has returned to its original orientation. Notifications may also be given when communication link is disrupted. Methods are provided to reduce power consumption of each sensor tag sufficiently to allow powered solely from an energy harvesting unit, such as one comprising a solar panel, without requiring need of battery maintenance. The users may configure and control the tag manager and each sensor tag, and issue commands to each sensor tag, from the Internet. |
