Joe - Thanks for the info on the 900Mhz CC1100 and CC1150 - on it not meeting 802.15.4 physical layer - as I was wondering about that. Currently the chips I know about that are 900Mhz 802.15.4 are the ZMD 44101 and the delayed Atmel AT86RF210 device.
I would suggest 900Mhz has capability of going a greater distances for the same consumed power/Watts as 2.4G, which is important for the low-power, low-cost embedded wireless sys. The Microchip AN655 is interesting for its discussion on 802.15.4 / Zigbee. 802.15.4 is important as defining the basic layers for a number of systems to inter-operate - both on physical layer and also MAC layer software. Zigbee as a brand, is important for the consumer side to know that they may inter-operate on the application layer - and is more of a marketing requirement - with of course lots of software implications. 802.15.4 I think has a lot to offer to a TinyOS discussion. It's an approved standard, of which a developer can choose what role a product is going to play in a 802.15.4 network. As the 15.4 standard says in its intro: "The main objectives of an LR-WPAN is ease of installation, reliable data transfer, short-range operation, extremely low cost, and a reasonable battery life, while maintaining a simple and flexible protocol." ~Neil > -----Original Message----- > From: Joe Polastre [mailto:[EMAIL PROTECTED] > Sent: Thursday, June 23, 2005 10:49 AM > To: Neil Hancock > Cc: [email protected] > Subject: Re: [Tinyos-devel] PIC/Zigbee data > > The 1100 and 1150 do not follow the 15.4 spec at the physical layer. > > Also, Microchip's release can barely be called "ZigBee". On the very > first page they say: > > "Version 1.0 of the Microchip Stack contains the > following limitations. Please note that MIcrochip is > planning to add new features as time progresses. Refer > to the source code version log file (version.log) for > current limitations. > . Not ZigBee protocol-compliant > . No cluster and peer-to-peer network support > . No security and access control capabilities > . No router functionality > . Does not provide standard profiles; however, it > contains all necessary primitive functions to > create profiles > . Does not support one-to-many bindings" > > In other words, it doesn't do very much at all. > > -Joe > > (moved to tinyos-users, since it doesn't deal with core tinyos module > development) > > On 6/23/05, Neil Hancock <[EMAIL PROTECTED]> wrote: > > > > Circuit Cellar July has a great article on Zigbee/microchip kit. > > It references microchip AN695 where there is a good discussion on > 802.15.4 > > and Zigbee - and what microchip has implemented of Zigbee protocol 1.0 - > > which is available for download. They are using 2.4Ghz CC2420 from > Chipcon > > http://ww1.microchip.com/downloads/en/AppNotes/00965a.pdf > > > > I also noticed that ChipCon have produced two new 900Mhz devices in > 16pin > > and 20pin devices - CC1100 and CC1150 > > Is anybody working on a 900Mhz 802.15.4 compatible mac for these? > > They are I believe register compatible with the CC2420 line, so it may > be > > reasonably easy to interface to. > > > > ~Neil > > > > > > _______________________________________________ > > Tinyos-devel mailing list > > [EMAIL PROTECTED] > > https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos- > devel > > _______________________________________________ Tinyos-users mailing list [email protected] https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-users
