) The Patient Mote software uses the same software modules as the Medicine Mote.
The UHF RFID readermodule is enabled while the scale reader and HF RFID reader modules
are disabled via compiler switches. The UHF RFID reader module interfaces with the UHF
RFID reader. All protocol speci?¬?c details are hidden in this module. (For more information on
the AWID UHF RFID reader protocol, refer to LR-911 reader manual.) When a UHF tag is
detected, it is forwarded to the Data Fusion module for processing. The design of the Data
Fusion module is extended to support the Patient Mote functionalities.
The data fusion algorithm for the Patient Mote is described below.
Data Fusion Algorithm (Patient Mote)
1. On reception of a UHF tag ID message from the Base Station PC, enable the UHF
RFID reader system. (This indicates medication needs to be taken.)
2. On reception of a cleared tag ID message, disable the UHF RFID reader system.
(This indicates no medication required.)
3. On reception of a UHF tag ID from the UHF RFID reader, increment its detected
counter if ID matches
4. On every half second timer, perform the following operations:
a. If counter is greater than 6, set counter to 6 (3 s)
b. If counter is not zero, enable buzzer and decrement counter by 1
c. If counter is zero, disable buzzer
17.4.3 Base Station Software
The base station PC software developed in the previous phase (Section 17.
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