Hi Alex
Sorry I dont intend to be a wet blanket here. I would like to add rather
than building the ZigBee stack on Linux user space it would be better to
use a modem based approach.
In todays market there are a lot of certified modules avaliable in the
market and they are cheap too. So if i see from a user point of view i dont
see a need for a userspace stack.
>From my experience module as a modem is a better method for the following
reasons
1. The cost and time for certifing the ZigBee stack is huge comapred to the
module cost
2. ZigBee stack itself is not enough you need a lot of profiles to do any
thing useful. Even the profiles need to be certified
3. You will need encryption libraries like the one from Certicom- even on
module you have to pay extra
4. Even the mac is not certified in Linux
A third party module has all these things inbuild all you need is an
interface driver which can be USB,SPI or even UART
Just to add but in case of 6Lowpan a good TCP-UDP-IP infrastructure exsists
in Linux.
On Tue, Sep 24, 2013 at 10:01 AM, Alexander Aring <alex.ar...@gmail.com>wrote:
> Hi Sascha,
>
> On Mon, Sep 23, 2013 at 08:41:20PM +0200, Sascha Herrmann wrote:
> > Hi,
> >
> > > Could it be related somehow to ZigBee lincense ? (
> http://www.zigbee.org/)
> > > Moreover, I saw in a lecture:
> > >
> http://elinux.org/images/7/71/Wireless_Networking_with_IEEE_802.15.4_and_6LoWPAN.pdf
> > > from 2012, by Alan Ott:
> >
> > Maybe you can get some more information about this issue from this
> > article:
> >
> http://www.freaklabs.org/index.php/Blog/Zigbee/Zigbee-Linux-and-the-GPL.html
> > The author had started developing an OpenSource ZigBee Stack and was
> > Member of the ZA. If you dig somewhat deeper in his blog (I don't have
> > the exact url at hand), you will find an article where he describes that
> > he tried to start an discussion about removing the problematic part from
> > the ZigBee License, but failed with this approach. After this he stopped
> > the development of the stack and quit his ZA membership.
> >
> > If the information of this article holds, the ZigBee License is
> > incompatible with the Linux Kernel.
> >
>
> and here comes the point to switch into a userspace application (if
> possible) to avoid license issues. I am not a big fan of that but we can
> see this in several other projects at the linux kernel like usbdevfs
> which allow to write userspace usb drivers which are not under GPL.
>
> My basic message is to say "it is possible", but we can't do anything
> with that. Maybe it helps us to make a better userspace api. :-)
>
> - Alex
>
>
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--
Regards,
Prajosh Premdas
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