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)
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-----Hi, kwright
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Min Lin
Sent: Wednesday, August 23, 2006 2:40 AM
To: tinyos-help@Millennium.Berkeley.EDU
Subject: [Tinyos-help] choosing mica2 operating RF frequency
May I know how to program the 916MHz mote to 868MHz? Please help, it is urgent. Thanks. :)
Best regards
--
Lin Min
Email: [EMAIL PROTECTED]
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