RAVEN how much does Zigbee stack take

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Hi All

I am developing a new product and still very much in the research phase. It is RF based and rightly or wrongly I have decided to go for the native USB option (one of the AT90USBxxx line).

I've looked at the RAVEN USB Stick which uses an AT90USB1287 which of course has 128kb of flash which is very generous but also quite expensive. At the other end of the market I could go for the AT90USB162 which is quite cheap.

However, I don't know whether the Zigbee protocol stack will fit on this processor and even if it does whether there is enough room for the application as well as a USB stack.

Frankly, I have only just reconsidered ZibBee. The data is simple and up until now I have been considering Nordic's nRF2401L

So does anyone have any experience or thoughts on this.

Thanks
Chris

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Hi Chris.
A Zigbee stack for a full router (which you will need at least one) is quite large and is usually minimally around 50-60 kB. So it definitely won't fit into a 16kB part. This is probably overkill anyways from the way you described it. You could probably do better to just use the 16kB AT90USB and some XBee 802.15.4 modules.

If you will be designing your own board, I'd recommend using the AT90USB16 and an 802.15.4 chip like the AT86RF230 or similar from other vendors. 802.15.4 is becoming a defacto standard for short-range, low-power RF apps and if you don't need the networking and interoperability of Zigbee, then using 802.15.4 in a star topology is probably the best bet. The frame format and addressing is already set and there is a good open source code base. There is already an AT86RF230 driver that is open source available in the Contiki distribution (www.sics.se/contiki). The other benefit is that you can upgrade to other 802.15.4 protocols in the future should you ever need to.

Otherwise, the nRF24 is still a classic along with the CC1101, but they're falling out of favor since 802.15.4 chips are dropping in price due to competition.

Akiba

FreakLabs
Open Source Wireless
http://www.freaklabs.org

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Thanks Akiba

I am really tempted by the simplicity of the nRF24x series especially since Atmel have a Ev Board with a AT90USB162 which is a perfect reference design for what I have in mind.

Hardware is not my strong point so I am going for simplicity, also my product is very cost sensitive. However I am a big believer in standards and of course the 802.15.4 is a standard.... *sigh* decisions decisions

Thanks again
Chris

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802.15.5 with 802.15.4 should serve as a good alternative in the coming months.