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You can also use setRFPower(0) that is less than
-20 dbm.
Second if you put mica2 at ground level range
decrease a lot.
third you can try to use antenne shorter than
lamda/4
----- Original Message -----
Sent: Tuesday, January 04, 2005 5:47
PM
Subject: [Tinyos-help] Mica2 radio range,
setRFPower and related questions
Hi all,
I have recently tried to assess the minimum and maximum ranges of
my mica2 motes.
As far as I know there
are two ways to modify transmission power of the motes:
1. use the setRFPower Function in
CC1000Control
2. define RADIO_XMIT_POWER in
the makelocal file.
Maximum ranges seem
to be how we expect them to (30m at 0dB). Minimu ranges seem to be to high
however. If I set the motes to -20 db I still get ranges in excess of 10
Meters (outdoors, 1m above ground). This seems to be to high.
For my app I would like to restrict the range of the
motes to a few meters at most. Is this possible by setting the transmit power
or do I have to take extra measures?
What
should be a mean range when setting a mote to -20dB?
Thanks in advance
Christian
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