User's Manual

V3d Product Specification, Version 2.06
3.4.1 Main Battery Switch
A method is to be provided which enables complete disconnection of the internal batteries from
the electronics, to preserve shelf life and minimize battery recharging / replacement events.
The method shall be clandestine or keyed to reduce the opportunity for deviant or accidental
behavior resulting in deactivation of the V3d.
3.4.2 Battery Level Reporting
The consumed power is to be reported by the V3d, but differently depending on the battery type.
For SLA and Li-ion, the V3d reports battery voltage level. For LiSOCl2, the fuel gauge is used
to report state of charge. The type of battery is made known to the V3d either through serial
port configuration or OTA by configuration command (TBD).
No monitoring of the power supplied by the external power source (battery charger) is planned.
3.4.3 Wakeup from Sleep
The presence of the DTR signal awakens the device if sleeping, and while DTR is present the
device remains awake. Also, the V3d can be commanded to NOT remain awake by software
control.
3.4.4 Real-Time Clock Function
The V3d shall maintain date and time information even when in its lowest power state. The
clock is updated following contact with either network (satellite or cellular) or following a
successful GPS location estimate.
3.4.4.1 RTC Accuracy
Without contact with GPS or the ORBCOMM system time reference, the RTC shall maintain
accurate time to within 3 seconds per 1 year interval. Time base shall be Coordinated Universal
Time (UTC), formerly known as Greenwich Meridian Time (GMT).
Runtime is essentially the time when the key switch is in the ON position and power is present,
and includes both wake and sleep periods.
3.4.4.2 Hour Meter
Value of current hours of runtime is maintained as a counter type record and stored in non-
volatile memory periodically. The value is observable from the diagnostic serial interface and
not over-the-air. (Note: RTC is powered directly by battery and not through keyswitch).
3.4.4.3 Always On Mode
Always On mode allows the GSM receiver to remain on in an idle state. This allows for
incoming SMS messages to be received be the device at any time. When an SMS is received
the GSM module wakes the M100 to process the incoming message. Incoming messages can
be used to poll, reconfigure, or send other commands or data to the device. Message types are
listed in the Over the Air Protocol document.
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