Hi, That question is probably of more general interest. I'm sorry if I bother you here. I vaguely remember that somebody once said that CTP does not support LPL, so I have a couple of questions:
Could you briefly explain what you did to get low-power listening to work? Did you just have to setLocalDutyCycle()? What about setRXDutyCycle()? How could you set this on a per-message basis, or is it implicit when you setLocalDutyCycle() and only needs to be set if you want a different value? My impression was that the routing layer was sending a lot of messages to update the paths. So even if your application is only sending one message every 5 minutes, have you verified that you actually do get the duty-cycle that you set? I would be worried that the nodes just start sending very long preambles to send link probes and route updates and that thus the radio basically stays on all the time. Cheers, Urs Omprakash Gnawali wrote: > On Mon, Mar 30, 2009 at 4:04 AM, Manuel Fernandez Santo Tomas > <[email protected]> wrote: >> Hi all, >> >> >> I'm using Tinyos 2.1, and I've deployed a small network of IRIS motes >> with CTP as the protocol. >> >> So far it works, but I have quite high power consumption(>3mA), so I >> wanted to use the Low Power Listening layer of the RF230 radio. >> >> I must be doing something wrong because I see no improvement. I based my >> code in the Antitheft application and the TestLPL one. >> >> Please could someone give me some hint about putting the radio in low >> power using CTP protocol? Is it possible at all? > > I have not personally tried it on IRIS but I have gotten CTP+LPL to > achieve 2-4% duty-cycle on TelosB platform - approx 100 nodes, each > node sending one data packet every 5 mins. > > What is your packet rate? > > - om_p _______________________________________________ Tinyos-help mailing list [email protected] https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
