Sensor Module

The Sensor Module controls the communication between the badges/routers and the remainder of the badge tracking system. This module takes data from the Zigbee network and formats and sends it in a way that the database controller can understand.

The Badges will contain an ID number and a status variable. The ID number will be directly associated with a database entry, and the status variable will tell the badge how often it needs to transmit its information to the routers.

The Readers in the Zigbee Network will follow the Zigbee protocol, and will deal with generating location and time information, attaching this information to the ID number, and sending it to the Control module. The readers will also propogate any changes to the Status variable passed in by the Control module.

The Control module provides a unified method for outside components to communicate with the Zigbee readers. It will pass status updates it receives from the Command Receiver and badge information from the readers to their destinations.

The Command Receiver provides a method for receiving commands and updates sent by an admin using the web interface.

The Data Buffer and Transmitter holds data sent by the Control module until X bytes have been passed in or Y seconds have passed, whichever comes first, at which point it will initiate a connection with the Database Control and securely dump the information in the buffer.