<s>
The	O
ELM327	B-Device
is	O
a	O
programmed	O
microcontroller	B-Architecture
produced	O
for	O
translating	O
the	O
on-board	O
diagnostics	O
(	O
OBD	O
)	O
interface	O
found	O
in	O
most	O
modern	O
cars	O
.	O
</s>
<s>
The	O
ELM327	B-Device
command	O
protocol	O
is	O
one	O
of	O
the	O
most	O
popular	O
PC-to-OBD	O
interface	O
standards	O
and	O
is	O
also	O
implemented	O
by	O
other	O
vendors	O
.	O
</s>
<s>
The	O
original	O
ELM327	B-Device
was	O
implemented	O
on	O
the	O
PIC18F2480	B-Architecture
microcontroller	B-Architecture
from	O
Microchip	O
Technology	O
.	O
</s>
<s>
The	O
ELM327	B-Device
abstracts	O
the	O
low-level	O
protocol	O
and	O
presents	O
a	O
simple	O
interface	O
that	O
can	B-Protocol
be	O
called	O
via	O
a	O
UART	O
,	O
typically	O
by	O
a	O
hand-held	O
diagnostic	O
tool	O
or	O
a	O
computer	O
program	O
connected	O
by	O
USB	B-Protocol
,	O
RS-232	O
,	O
Bluetooth	B-Protocol
or	O
Wi-Fi	O
.	O
</s>
<s>
There	O
are	O
a	O
large	O
number	O
of	O
programs	O
available	O
that	O
connect	O
to	O
the	O
ELM327	B-Device
.	O
</s>
<s>
ELM327	B-Device
Functions	O
:	O
</s>
<s>
The	O
protocols	O
supported	O
by	O
ELM327	B-Device
are	O
:	O
</s>
<s>
The	O
ELM327	B-Device
command	O
set	O
is	O
similar	O
to	O
the	O
Hayes	B-Device
AT	I-Device
commands	I-Device
.	O
</s>
<s>
The	O
ELM327	B-Device
is	O
a	O
PIC	B-Architecture
microcontroller	I-Architecture
that	O
has	O
been	O
customized	O
with	O
ELM	O
Electronics	O
 '	O
proprietary	O
code	O
that	O
implements	O
the	O
testing	O
protocols	O
.	O
</s>
<s>
When	O
ELM	O
Electronics	O
sold	O
version	O
1.0	O
of	O
its	O
ELM327	B-Device
,	O
it	O
did	O
not	O
enable	O
the	O
copy	B-Application
protection	I-Application
feature	O
of	O
the	O
PIC	B-Architecture
microcontroller	I-Architecture
.	O
</s>
<s>
Consequently	O
,	O
anyone	O
who	O
had	O
bought	O
a	O
genuine	O
ELM327-v1.0	O
could	O
use	O
a	O
device	B-General_Concept
programmer	I-General_Concept
to	O
read	O
ELM	O
's	O
proprietary	O
microcontroller	B-Architecture
firmware	O
as	O
a	O
binary	O
blob	O
.	O
</s>
<s>
Pirates	O
could	O
trivially	O
produce	O
an	O
ELM327	B-Device
clone	O
by	O
purchasing	O
the	O
same	O
microcontroller	B-Architecture
chip	O
and	O
programming	O
it	O
with	O
the	O
copied	O
blob	O
.	O
</s>
<s>
ELM327	B-Device
copies	O
were	O
widely	O
sold	O
in	O
devices	O
claiming	O
to	O
contain	O
an	O
ELM327	B-Device
device	O
,	O
and	O
problems	O
have	O
been	O
reported	O
with	O
the	O
copies	O
.	O
</s>
<s>
Although	O
these	O
copies	O
may	O
contain	O
the	O
ELM327	B-Device
v1.0	O
code	O
,	O
they	O
may	O
falsely	O
report	O
the	O
version	O
number	O
as	O
the	O
current	O
version	O
provided	O
by	O
the	O
genuine	O
ELM327	B-Device
,	O
and	O
in	O
some	O
cases	O
report	O
an	O
as-yet	O
non-existent	O
version	O
.	O
</s>
<s>
Released	O
software	O
versions	O
for	O
the	O
ELM327	B-Device
are	O
1.0	O
,	O
1.0a	O
,	O
1.1	O
,	O
1.2	O
,	O
1.2a	O
,	O
1.3	O
,	O
1.3a	O
,	O
1.4	O
,	O
1.4b	O
,	O
2.0	O
,	O
2.1	O
,	O
2.2	O
and	O
2.3	O
only	O
.	O
</s>
<s>
The	O
actual	O
functions	O
of	O
these	O
copies	O
are	O
nonetheless	O
limited	O
to	O
the	O
functions	O
of	O
the	O
original	O
ELM327	B-Device
v1.0	O
,	O
with	O
their	O
inherent	O
deficiencies	O
.	O
</s>
<s>
Initial	O
public	O
release	O
,	O
the	O
ELM327	B-Device
v1.0	O
supported	O
:	O
</s>
