3. Operation
3.1 Transport Mode
The sensor is hibernating without functionality to prevent radio transmissions and to minimize
battery usage. To enter
fl
ight mode from default mode, the user shall press and hold any button
for at least 10 seconds. Upon release of the button,
fl
ight mode is activated and the green LED
shall
fl
ash rapidly for a duration of 3 seconds as an indication to the user.
To exit
fl
ight mode, the user shall press and hold any button for at least 10 seconds. Upon release
of the button,
fl
ight mode is deactivated and default mode entered. As an indication to the user,
the green LED shall light up for a duration of 3 seconds.
3.2 Default Mode
This mode is active when the device is in normal operating mode.
Whenever device motion is detected after a period of rest, the green LED shall
fl
ash 3 times
within 500ms.
After a button is pressed, the green LED shall turn on for at most 50ms, after which an uplink
transmission is scheduled. After the uplink transmission is complete – but before any down-link
windows are opened – the green LED shall turn on for 500ms.
When a command to actuate the vibrator is received, all LEDs shall
fl
ash rapidly for the duration
of the buzz. A buzz shall last 5 seconds with the buzzer activated for one (1) second followed by a
one (1) second idle period, resulting in 3 vibrations and 2 idle periods.
3.3 Charging Indication
These indications do not constitute an operating mode by themselves, but may be active
whenever there are no other ongoing indications as de
fi
ned by the
fl
ight and default operating
modes.When the device is connected to a powered charger, and the battery is charging, the
green LED shall be on continuously. If the battery is fully charged while a powered charger is
connected, the green LED shall fade-in and out from 0% to 50% brightness at a rate of 12 cycles
per minute.
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