<s>
A	O
wireless	B-Device
identification	I-Device
and	I-Device
sensing	I-Device
platform	I-Device
(	O
WISP	O
)	O
is	O
an	O
RFID	B-Application
(	O
radio-frequency	B-Application
identification	I-Application
)	O
device	O
that	O
supports	O
sensing	O
and	O
computing	O
:	O
a	O
microcontroller	O
powered	O
by	O
radio-frequency	O
energy	O
.	O
</s>
<s>
That	O
is	O
,	O
like	O
a	O
passive	B-Application
RFID	I-Application
tag	O
,	O
WISP	O
is	O
powered	O
and	O
read	O
by	O
a	O
standard	O
off-the-shelf	O
RFID	B-Application
reader	O
,	O
harvesting	O
the	O
power	O
it	O
uses	O
from	O
the	O
reader	O
's	O
emitted	O
radio	O
signals	O
.	O
</s>
<s>
To	O
an	O
RFID	B-Application
reader	O
,	O
a	O
WISP	O
is	O
just	O
a	O
normal	O
EPC	O
gen1	O
or	O
gen2	O
tag	O
;	O
but	O
inside	O
the	O
WISP	O
,	O
the	O
harvested	O
energy	O
is	O
operating	O
a	O
16-bit	O
general	O
purpose	O
microcontroller	O
.	O
</s>
<s>
The	O
microcontroller	O
can	O
perform	O
a	O
variety	O
of	O
computing	O
tasks	O
,	O
including	O
sampling	O
sensors	O
,	O
and	O
reporting	O
that	O
sensor	O
data	O
back	O
to	O
the	O
RFID	B-Application
reader	O
.	O
</s>
