Hi Roman,
Thank you. Have you tested your modified CTP using CC2420LPL?? What was the power consumption?? I also used another approach ( a dirty quick fix, but it was fastest approach) for using LPL in CTP. I modified the DefaultLpl.nc file to use a specified sleep period for all packets it transmitts. As every packet passes through this layer, this sleep period is applied to all Tx packets. This approach is performimg duty cycle but the power consumption is again very huge. The lowest consumption is 4mA. The power consumption is same as was in case when I set the Rx sleep perion in top level application only for the application level packet. This I stated in my previous email. So untill now I am not able to get the 200-400uA sleep current in CTA. What do you suggest to get lower power consumtion? Or again same question--Do you think I should try another multihop routing protocol over CC2420 LPL?? Regards Ravi --- Roman Lim <[EMAIL PROTECTED]> wrote: > Hi > > In order to use lpl with ctp you could modify the > ctpforwarding engine > and add the lpl information for transmission. > I added an interface where you can tell the ctp > layer to use a default > rx sleep interval for forwarded packets. > > roman > > Ravi Prasad wrote: > > Dear Philip, > > > > Thank you for your reply. > > > > As you said that CC2420 LPL in Tinyos2.x works > with > > arbitrary topologies, I tried to use LPL with > > collection protocol provided in tinyos2.0.2. I > used > > the LowPowerListening interface in my top level > > application to set the sleep interval of TX and > Rx > > sides. The application somehow worked with one > > transmitter & one receiver. But the lowest current > > consumption was 4mA which is very huge. Also the > > initial tree formation time is very big. If I use > a > > sleep interval of more than 3seconds the tree > dosent > > even forms and nothing works. > > > > I think as the CollectionTree also uses > ActiveMessage > > to send/receive data/routing packets, the > > sleepinterval setting should be controlled at a > single > > point from where all packets (i.e routing and > data) > > flow, that is the ActiveMessage component. > > > > Can you please comment on the above? > > > > Also it would be great if you have some suggestion > to > > use another multihop routing on top of CC2420LPL. > > > > > > Regards > > Ravi > > --- Philip Levis <[EMAIL PROTECTED]> wrote: > > > >> Ravi Prasad wrote: > >>> Hi all, > >>> > >>> My need - Low power multihop for CC2420 (with > >>> Atmega128 mcu i.e micaz).. > >>> > >>> > >>> Low power CC2420 is being asked so many times in > >> this > >>> list. I have been working on TinyOS1.x and in > that > >> low > >>> power CC2420 was not really available. > >>> > >>> Now I have switched to TinyOS2.x and I know that > >> there > >>> is a LPL implementation of CC2420. But it seems > >> that > >>> is for a Star network topology & not used in any > >>> multihop routing protocol. Am I right?? > >>> > >> The CC2420 LPL in 2.x works for arbitrary > >> topologies. > >> > >> Phil > >> > > > > > > > > > > > ____________________________________________________________________________________ > > Choose the right car based on your needs. Check > out Yahoo! Autos new Car Finder tool. > > http://autos.yahoo.com/carfinder/ > > _______________________________________________ > > Tinyos-help mailing list > > Tinyos-help@Millennium.Berkeley.EDU > > > https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help > > ____________________________________________________________________________________ Park yourself in front of a world of choices in alternative vehicles. Visit the Yahoo! Auto Green Center. http://autos.yahoo.com/green_center/ _______________________________________________ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
