User guide

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© 2009 Microsoft Corporation, all rights reserved.
SenseCam v2.3 User Guide Page 16 of 31 10/03/2009
4.3. Interpreting the lights on the SenseCam
There are three lights (LEDs) on the top of the
SenseCam that can be used to determine the status
of the device (see Figure 11). The green „power‟
LED is used to indicate whether the unit is switched
on or not (illuminated or not respectively).
Furthermore, if this LED is blinking intermittently,
this means that the battery is running low and should
be recharged.
The yellow „busy‟ LED is used to indicate that the
SenseCam microcontroller is busy. This is typically
when the unit is reading sensor information and
storing it into flash memory, but may also indicate some other kind of internal operation.
For example, whenever the SenseCam is powered
on it has to spend a few seconds initialising and
during this time the yellow LED is illuminated.
The red/green „charging‟ and „do-not-disturb‟ LED has two functions. Normally (when do-
not-disturb mode is not active), it will illuminate when a charger or PC has been connected
to the SenseCam via the USB connector. It flashes green when the SenseCam is charging,
and changes to a constant green LED when charging is complete. In addition, it will flash
red whenever there is a USB data transfer, which typically occurs during docking with a PC
and downloading of SenseCam images and data.
When „do-not-disturb‟ mode is activated (using the topmost of the side buttons), the red
LED will be lit to indicate that do-not-disturb mode is active and no pictures will be taken.
This lasts for around 7 minutes. When there are 15 seconds left in do-not-disturb mode, a
tone will be played and the red LED will continue flashing until either the time runs out
(and pictures restart), or the do-not-disturb button is pressed again (causing the LED to go
solid red again, and the timer to restart).
The red LED should never illuminate when the SenseCam is connected to a USB charger
unit as there should be no data exchange.
Finally, all three lights will flash briefly on completion of the power up sequence.
Green „power‟ LED
LED status
Meaning
Off
Switched off
Solid green
Switched on
and operating
with good
battery capacity
Intermittently
blinking green
Powered up and
operating with
Green
„power‟
light
On/off
button
Red/green
„charging‟
and „do-
not-disturb‟
light
Figure 11: SenseCam LEDs.
Yellow
„busy‟
light