for evaluation. This data logger can be inserted
along with any transported article and this article
can then be tracked throughout the supply chain,
and the data can be scanned at any point using
an RFID reader.
This system can operate in two modes: data
logger mode and event logger mode.
In data logger mode, the system reads all the
sensor values once every second and stores the
same inside EEPROM. The system stops logging
the data when the allocated memory for a
particular sensor gets filled.
In event logger mode, the system configures the
threshold limits for each sensor. Whenever the
sense value is outside the set threshold limits, it is
stored in the EEPROM.