<s>
Phoenix-RTOS	B-Operating_System
is	O
a	O
real-time	B-Operating_System
operating	I-Operating_System
system	I-Operating_System
designed	O
for	O
Internet	B-Operating_System
of	I-Operating_System
Things	I-Operating_System
appliances	O
.	O
</s>
<s>
Phoenix-RTOS	B-Operating_System
is	O
the	O
successor	O
to	O
the	O
Phoenix	O
operating	B-General_Concept
system	I-General_Concept
,	O
developed	O
from	O
1999	O
to	O
2001	O
by	O
Pawel	O
Pisarczyk	O
at	O
the	O
Department	O
of	O
Electronics	O
and	O
Information	O
Technology	O
at	O
Warsaw	O
University	O
of	O
Technology	O
.	O
</s>
<s>
Phoenix	O
was	O
originally	O
implemented	O
for	O
IA-32	B-Device
microprocessors	B-Architecture
and	O
was	O
adapted	O
to	O
the	O
ARM7TDMI	O
processor	O
in	O
2003	O
,	O
and	O
the	O
PowerPC	B-Architecture
in	O
2004	O
.	O
</s>
<s>
The	O
system	O
is	O
available	O
under	O
the	O
GPL	B-License
license	I-License
.	I-License
</s>
<s>
The	O
decision	O
to	O
abandon	O
the	O
development	O
of	O
Phoenix	O
and	O
write	O
the	O
Phoenix-RTOS	B-Operating_System
from	O
scratch	O
was	O
taken	O
by	O
its	O
creator	O
in	O
2004	O
.	O
</s>
<s>
Phoenix-RTOS	B-Operating_System
2.0	O
is	O
based	O
on	O
a	O
monolithic	B-Operating_System
kernel	I-Operating_System
.	O
</s>
<s>
Initially	O
versions	O
for	O
the	O
IA-32	B-Device
processor	O
and	O
configurable	O
eSi-RISC	B-Architecture
were	O
developed	O
.	O
</s>
<s>
In	O
cooperation	O
with	O
NXP	O
Semiconductors	O
,	O
Phoenix-RTOS	B-Operating_System
2.0	O
was	O
also	O
adapted	O
to	O
the	O
Vybrid	O
(	O
ARM	B-Architecture
Cortex-A5	O
)	O
platform	O
.	O
</s>
<s>
This	O
version	O
is	O
equipped	O
with	O
PRIME	O
(	O
Phoenix-PRIME	O
)	O
and	O
the	O
G3-PLC	O
(	O
Phoenix-G3	O
)	O
protocol	O
support	O
,	O
used	O
in	O
Smart	B-Architecture
Grid	I-Architecture
networks	O
.	O
</s>
<s>
Phoenix-RTOS	B-Operating_System
runs	O
applications	O
designed	O
and	O
written	O
for	O
the	O
Unix	B-Application
operating	I-Application
system	I-Application
.	O
</s>
<s>
Phoenix-RTOS	B-Operating_System
version	O
3.0	O
is	O
based	O
on	O
a	O
microkernel	B-Operating_System
.	O
</s>
<s>
The	O
main	O
problem	O
with	O
the	O
first	O
implementation	O
was	O
low	O
kernel	O
modularity	O
and	O
difficulties	O
with	O
the	O
management	O
process	O
of	O
software	O
development	O
(	O
device	B-Application
drivers	I-Application
,	O
file	O
system	O
drivers	O
)	O
.	O
</s>
<s>
It	O
is	O
an	O
open	O
source	O
operating	B-General_Concept
system	I-General_Concept
(	O
on	O
BSD	O
license	O
)	O
,	O
available	O
on	O
GitHub	B-Application
.	O
</s>
<s>
The	O
Phoenix-RTOS	B-Operating_System
can	O
be	O
equipped	O
with	O
HaaS	O
(	O
Hardware	O
as	O
a	O
Software	O
)	O
modules	O
that	O
allow	O
the	O
implementation	O
of	O
rich	O
devices	O
functionality	O
,	O
e.g.	O
</s>
<s>
In	O
2016	O
,	O
Energa-Operator	O
(	O
based	O
in	O
Poland	O
)	O
installed	O
6.6k	O
Data	O
Concentrator	O
Units	O
with	O
balancing	O
meter	O
functionality	O
in	O
its	O
network	O
,	O
based	O
on	O
the	O
Phoenix-RTOS	B-Operating_System
.	O
</s>
