[riot-devel] Zephyr RTOS

Emmanuel Baccelli Emmanuel.Baccelli at inria.fr
Wed Feb 24 13:03:53 CET 2016

Hi Drasko,

yes, Zephyr looks relevant.
It should be looked into in more details.

Some first impressions:

- Zephyr is not brand new: based on commit history, it looks like an Intel
/ WindRiver product which has existed for some time.

- Zephyr's choice of license (Apache) is surprising for something under the
Linux Foundation umbrella which champions (L)GPL licences -- for example:
RIOT's license, which is LGPLv2.1.

- Zephyr supports few boards, and does not seem to target smaller hardware
based on 8bit, 16bit, or lower-end 32bit (for instance Cortex M0). On the
contrary, RIOT supports all of these, as well as bigger 32bit hardware
(Cortex M3, M4, x86)

- Zephyr seems to impose a mode of operation with a single thread when
there is not plenty of memory, contrary to RIOT.

- Zephyr seems to be using Contiki's network stack, which in our opinion is

This week some RIOTers have a booth at Embedded World in Nuremberg, where
Zephyr also has a booth + talk. Maybe we get some more info at this

If you (or anyone else) have more infos, impressions or opinions, please



On Fri, Feb 19, 2016 at 5:20 PM, Drasko DRASKOVIC <
drasko.draskovic at gmail.com> wrote:

> Hi RIOT experts,
> any opinions on this:
> http://linuxgizmos.com/zephyr-a-tiny-open-source-iot-rtos/?
> Looks like a very serious competitor.
> BR,
> Drasko
> _______________________________________________
> devel mailing list
> devel at riot-os.org
> https://lists.riot-os.org/mailman/listinfo/devel
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