[Tinyos-help] choosing mica2 operating RF frequency

[David Moss]

If you're using the default CC1000 stack, connect your app to the
CC1000Control interface provided by CC1000ControlM and call
CC1000Control.TuneManual(868000000).  The mote may have trouble working at
that frequency, but I think I've gotten some of mine down to around 855 MHz.
 
I also recommend downloading the newest CC1000 stack located in the TinyOS
1.x CVS at /contrib/rincon/tos/lib/CC1000Radio.  You can then edit your
Makefile to include the directories in the /tos/lib/CC1000Radio library,
overriding the default /tos/platform/mica2 CC1000 stack without breaking
TinyOS.  The advantages this new stack has over the old one are:
 
* Measured 21% more throughput, even on the same baud rate.
 
* Better squelch algorithm for finding the noise threshold.
 
* Better architecture makes it easier to understand and hack.
 
* Smaller size (7% decrease in ROM, 12% decrease in RAM)
 
* Auto-recalibration of the radio, every 8 hours by default, for outdoor
applications
 
* Ability to double the default baud rate to 76.8 kBaud (not compatible with
some motes)
 
* Joe and Jason's pulse-check implementation - instead of checking for
preamble bits on
wakeup, check the RSSI reading on wakeup before the radio is fully in active
mode.
35.5% increase in mote lifetime on power mode 8 (4.376 mAh/day or less, a
35.3% decrease!)
It can go lower if you adjust the microcontroller as well to use the
internal oscillator.
Uisp with --wr_fuse_l=c4 (?) (needs verification)

-David
 

-----Original Message-----
From: tinyos-help-bounces at Millennium.Berkeley.EDU
[mailto:tinyos-help-bounces at Millennium.Berkeley.EDU] On Behalf Of Min Lin
Sent: Wednesday, August 23, 2006 2:40 AM
To: tinyos-help at Millennium.Berkeley.EDU
Subject: [Tinyos-help] choosing mica2 operating RF frequency


Hi, kwright
May I know how to program the 916MHz mote to 868MHz? Please help, it is
urgent. Thanks. :)

Best regards

-- 
Lin Min
Email: ml406 at cam.ac.uk  <mailto:ml406 at cam.ac.uk> 



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