On Apr 8, 2006, at 5:14 PM, Tahir Azim wrote:
Hi,
I am a novice to TinyOS and was just trying out the sample apps
provided with the tinyos code. Can somebody tell me how I can get
RadioCountToLeds to receive packets? I'm using the code from the
tinyos-2.x module (tinyos-2_0_devel-BRANCH branch) in CVS. My
topology and driver.py is given below, but the nodes are only able
to send packets but not receive them. Is there something wrong with
the noise levels I am using or the values of gain?
driver.py
------------
from TOSSIM import *
import sys
t = Tossim([])
r = t.radio()
f = open("topo.txt", "r")
lines = f.readlines()
for line in lines:
s = line.split()
if (len(s) > 0):
print " ", int(s[0]), " ", int(s[1]), " ", float(s[2]);
r.add(int(s[0]), int(s[1]), float(s[2]))
t.addChannel("RadioCountToLedsC", sys.stdout)
t.addChannel("Boot", sys.stdout)
t.getNode(1).bootAtTime(100001);
t.getNode(2).bootAtTime(800008);
t.getNode(3).bootAtTime(1800009);
r.setNoise(1, -77.0, 3.0)
r.setNoise(2, -77.0, 3.0)
r.setNoise(3, -77.0, 3.0)
for i in range(0, 10000):
t.runNextEvent()
topo.txt
-----------
1 2 -54.0
2 1 -54.0
1 3 -60.0
3 1 -60.0
2 3 -64.0
3 2 -64.0
Do the nodes get sendDone() events for their transmissions? One
possibility is that the noise levels are too high; based on the
recent topology generation software that USC contributed, I lowered
CCA detection from -77 to -95. This means that if the noise is at
-77, nodes will never think they have a clear channel.
I thought I had committed changes to the tutorial on this, but it
looks like they're not there. I'll make them now.
Phil
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