When you enter the scan mode at the first time, the app will automatically scan all the Bluetooth devices nearby, and then show them in a list (including the MAC addresses and their distances).
If you find the target item is on the list, please select it in order to keep tracking of it.
When you click on the "Keep Tracking" button, the app would only show the information of your target item, and also alarm you once it is out of range.
LOCATE Mode
Get the real-time location information from the Ultimate GPS Breakout.
Using the "time" as Primary Key, we store "date", "latitude" and "longitude" of every piece of location information into DynamoDB.
Fetch the most recent data from DynamoDB according to the timestamp, and then locate it on the Google MAP.