<s>
Eddystone	B-Operating_System
was	O
a	O
Bluetooth	B-General_Concept
Low	I-General_Concept
Energy	I-General_Concept
beacon	I-General_Concept
profile	O
released	O
by	O
Google	B-Application
in	O
July	O
2015	O
.	O
</s>
<s>
In	O
December	O
2018	O
Google	B-Application
stopped	O
delivering	O
both	O
Eddystone	B-Operating_System
and	O
Physical	O
Web	O
beacon	O
notifications	O
.	O
</s>
<s>
The	O
Apache	B-Application
2.0-licensed	I-Application
,	O
cross-platform	B-Operating_System
,	O
and	O
versioned	O
profile	O
contained	O
several	O
frame	O
types	O
,	O
including	O
Eddystone-UID	O
,	O
Eddystone-URL	O
,	O
and	O
Eddystone-TLM	O
.	O
</s>
<s>
Eddystone-URL	O
was	O
used	O
by	O
the	O
Physical	O
Web	O
project	O
,	O
whereas	O
Eddystone-UID	O
was	O
typically	O
used	O
by	O
native	O
apps	O
on	O
a	O
user	O
's	O
device	O
,	O
including	O
Google	B-Application
's	I-Application
first	O
party	O
apps	O
such	O
as	O
Google	B-Application
Maps	I-Application
.	I-Application
</s>
<s>
The	O
format	O
was	O
named	O
after	O
the	O
Eddystone	B-Operating_System
Lighthouse	O
in	O
the	O
UK	O
,	O
motivated	O
by	O
the	O
simplicity	O
of	O
a	O
lighthouse-signal	O
and	O
its	O
one-directional	O
nature	O
.	O
</s>
<s>
Though	O
similar	O
to	O
the	O
iBeacon	B-General_Concept
profile	O
released	O
by	O
Apple	O
in	O
2013	O
,	O
Eddystone	B-Operating_System
can	O
be	O
implemented	O
without	O
restriction	O
.	O
</s>
<s>
Eddystone	B-Operating_System
also	O
contains	O
a	O
telemetry	O
frame	O
(	O
Eddystone-TLM	O
)	O
designed	O
for	O
reporting	O
on	O
a	O
beacon	O
's	O
health	O
,	O
including	O
,	O
for	O
example	O
,	O
battery	O
level	O
.	O
</s>
<s>
Like	O
other	O
beacon	O
technology	O
,	O
beacons	O
with	O
Eddystone	B-Operating_System
can	O
give	O
devices	O
a	O
better	O
indication	O
of	O
what	O
objects	O
and	O
places	O
are	O
around	O
them	O
.	O
</s>
<s>
In	O
many	O
cases	O
,	O
the	O
simplicity	O
of	O
the	O
beacon	O
frame	O
means	O
that	O
an	O
app	O
(	O
for	O
example	O
Google	B-Application
Chrome	I-Application
)	O
is	O
required	O
in	O
order	O
to	O
interpret	O
the	O
beacon	O
's	O
signal	O
.	O
</s>
<s>
Differing	O
from	O
iBeacon	B-General_Concept
,	O
Google	B-Application
beacons	O
use	O
not	O
only	O
Bluetooth	O
but	O
also	O
WiFi	O
and	O
near	O
ultrasonic	O
sounds	O
to	O
communicate	O
between	O
devices	O
.	O
</s>
<s>
Eddystone	B-Operating_System
has	O
4	O
frame	O
types	O
.	O
</s>
<s>
Eddystone-UID	O
broadcasts	O
an	O
identifying	O
code	O
that	O
allows	O
apps	O
to	O
retrieve	O
information	O
from	O
app	O
servers	O
.	O
</s>
<s>
Eddystone-TLM	O
broadcasts	O
information	O
about	O
the	O
beacon	O
.	O
</s>
<s>
Eddystone-URL	O
broadcasts	O
a	O
URL	O
of	O
at	O
most	O
18	O
characters	O
that	O
redirects	O
to	O
a	O
website	O
that	O
is	O
secured	O
using	O
SSL	O
.	O
</s>
<s>
In	O
android	B-Application
4.4	O
or	O
higher	O
,	O
it	O
causes	O
a	O
notification	O
to	O
be	O
displayed	O
on	O
the	O
user	O
's	O
phone	O
.	O
</s>
<s>
As	O
of	O
October	O
2017	O
,	O
Google	B-Application
removed	O
Eddystone	B-Operating_System
detection	O
from	O
Chrome	B-Application
on	O
iOS	B-Application
and	O
Android	B-Application
.	O
</s>
<s>
In	O
tandem	O
with	O
the	O
Eddystone	B-Operating_System
,	O
Google	B-Application
launched	O
the	B-Application
Google	I-Application
beacon	O
platform	O
.	O
</s>
<s>
Attachments	O
can	O
be	O
updated	O
in	O
real-time	O
and	O
can	O
be	O
retrieved	O
by	O
an	O
app	O
using	O
the	O
Nearby	O
API	O
in	O
Android	B-Application
(	O
through	O
Google	B-Application
Play	I-Application
Services	I-Application
)	O
and	O
the	O
Nearby	O
library	O
for	O
iOS	B-Application
.	O
</s>
<s>
They	O
will	O
ignore	O
this	O
information	O
from	O
any	O
beacons	O
that	O
do	O
not	O
use	O
an	O
ID	O
number	O
belonging	O
to	O
Waze	B-Application
.	O
</s>
<s>
Without	O
proper	O
informed	O
consent	O
,	O
users	O
may	O
find	O
their	O
conversations	O
are	O
illegally	O
being	O
recorded	O
by	O
beacons	O
using	O
the	O
Eddystone	B-Operating_System
protocol	O
in	O
collaboration	O
with	O
the	O
Nearby	O
Messages	O
API	O
.	O
</s>
<s>
In	O
December	O
2018	O
,	O
Google	B-Application
stopped	O
delivering	O
both	O
Eddystone	B-Operating_System
and	O
Physical	O
Web	O
beacon	O
notifications	O
.	O
</s>
<s>
The	O
low	O
number	O
of	O
users	O
and	O
the	O
poor	O
user	O
experience	O
were	O
the	O
reasons	O
to	O
discontinued	O
the	O
Eddystone	B-Operating_System
beacons	O
.	O
</s>
<s>
Google	B-Application
continues	O
to	O
enable	O
access	O
to	O
the	O
beacon	O
dashboard	O
and	O
can	O
deliver	O
proximity-based	O
experiences	O
similar	O
to	O
Nearby	O
Notifications	O
via	O
third-party	O
apps	O
using	O
the	O
Proximity	O
Beacons	O
API	O
.	O
</s>
