[Tinyos-help] Antitheft compile warnings on new platform

[Philip Levis]

On Jul 30, 2007, at 6:39 AM, Todd Roper wrote:

>
> Phil,
>
> Thanks again for the quick reply!
>
> I asked the original question because there seems to be a lot of
> overhead coming from the root node.  I have a BaseStation app set  
> up to
> sniff what is going on close to the Root, and I see packets every  
> second
> or faster being transmitted.  This looks to be the overhead associated
> with keeping the routing tables updated and a beacon timer?? , etc.
>
> I am after a low-power, minimal RF overhead type of application
> (basically, sensors are reporting in at a minimum of every 5  
> minutes...
> however, I can have a large number of sensors installed to 1 root  
> (up to
> 200 nodes)).
>
> Can you suggest whether I should taylor this to fit that type of
> application? Or is there a different network implementation that I
> should be attempting to use besides CTP.  My nodes are installed all
> over a building and I have lowered the CC1000 baud in order to  
> bring the
> range up for the nodes, however, this increases the time per  
> packet.  I
> am after multi-year battery life so this is very important for me to
> figure out.

The CTP root node current sends beacons very often, in order to  
ensure that a network forms quickly.

You can always change the rate at which it sends beacons by  
increasing the value of the second parameter to CtpRoutingEngineP in  
CtpP.nc. E.g., if you set it to 30 it will send beacons every 30s.

Phil