<s>
Digi	O
XBee	B-Device
is	O
the	O
brand	O
name	O
of	O
a	O
popular	O
family	O
of	O
form	O
factor	O
compatible	O
wireless	O
connectivity	O
modules	O
from	O
Digi	B-Application
International	I-Application
.	O
</s>
<s>
The	O
first	O
XBee	B-Device
modules	O
were	O
introduced	O
under	O
the	O
MaxStream	B-Application
brand	O
in	O
2005	O
and	O
were	O
based	O
on	O
the	O
IEEE	O
802.15.4-2003	O
standard	O
designed	O
for	O
point-to-point	O
and	O
star	O
communications	O
.	O
</s>
<s>
Since	O
the	O
initial	O
introduction	O
,	O
the	O
XBee	B-Device
family	O
has	O
grown	O
and	O
a	O
complete	O
ecosystem	O
of	O
wireless	O
modules	O
,	O
gateways	O
,	O
adapters	O
and	O
software	O
has	O
evolved	O
.	O
</s>
<s>
The	O
XBee	B-Device
radios	O
can	O
all	O
be	O
used	O
with	O
the	O
minimum	O
number	O
of	O
connections	O
—	O
power	O
(	O
3.3V	O
)	O
,	O
ground	O
,	O
data	O
in	O
and	O
data	O
out	O
(	O
UART	O
)	O
,	O
with	O
other	O
recommended	O
lines	O
being	O
Reset	O
and	O
Sleep	O
.	O
</s>
<s>
Additionally	O
,	O
most	O
XBee	B-Device
families	O
have	O
some	O
other	O
flow	O
control	O
,	O
input/output	B-General_Concept
(	O
I/O	B-General_Concept
)	O
,	O
analog-to-digital	O
converter	O
(	O
A/D	O
)	O
and	O
indicator	O
lines	O
built	O
in	O
.	O
</s>
<s>
XBee	B-Device
modules	O
are	O
available	O
in	O
three	O
form-factors	O
.	O
</s>
<s>
All	O
XBees	B-Device
,	O
with	O
the	O
exception	O
of	O
the	O
XBee	B-Device
868LP	O
,	O
are	O
available	O
in	O
the	O
popular	O
20-pin	O
through-hole	B-Algorithm
form-factor	O
.	O
</s>
<s>
The	O
latest	O
XBee	B-Device
modules	O
are	O
also	O
available	O
in	O
surface-mount	O
and	O
micro-mount	O
form-factors	O
,	O
which	O
are	O
popular	O
for	O
high-volume	O
applications	O
due	O
to	O
the	O
reduced	O
manufacturing	O
costs	O
of	O
SMT	O
.	O
</s>
<s>
XBee	B-Device
modules	O
can	O
operate	O
either	O
in	O
a	O
transparent	O
data	O
mode	O
or	O
in	O
a	O
packet-based	O
application	B-Application
programming	I-Application
interface	I-Application
(	O
API	B-Application
)	O
mode	O
.	O
</s>
<s>
API	B-Application
mode	O
:	O
data	O
are	O
wrapped	O
in	O
a	O
packet	O
structure	O
that	O
allows	O
for	O
addressing	O
,	O
parameter	O
setting	O
and	O
packet	O
delivery	O
feedback	O
,	O
including	O
remote	O
sensing	O
and	O
control	O
of	O
digital	O
I/O	B-General_Concept
and	O
analog	O
input	O
pins	O
.	O
</s>
