SV: [Tinyos-help] Questions on NetSync and lowpower

[Jörgen Johansson]

Hi Joe,

When I don´t compile with "LOWPOWER" I don´t get GlobalTime.isValid() = TRUE, why?
How can I get both synchronization and full bandwith on the radio?
How can I switch between LOWPOWER and HIGHPOWER in realtime. I need the full bandwidth about one hour a day. The reset of the time I will run the Tmote in low power mode.

Best Regards
Jörgen Johansson
 

-----Ursprungligt meddelande-----
Från: tinyos-help-bounces at Millennium.Berkeley.EDU [mailto:tinyos-help-bounces at Millennium.Berkeley.EDU] För Joe Polastre
Skickat: den 21 juni 2006 17:39
Till: Henric Kärnhall
Kopia: tinyos-help at Millennium.Berkeley.EDU
Ämne: Re: [Tinyos-help] Questions on NetSync and lowpower


Hi Henric,

 The UART is always on, even in low power, if the node is connected to
a base station.  The radio is only on when NetSync defines the global
periods.

-Joe

On 6/21/06, Henric Kärnhall <henka707 at student.liu.se> wrote:
> Hi
>
> Thanks Joe for your answer on my last question.
>
> I have a few more questions on NetSync and about the lowpower flag to
> make.
>
> I want to use NetSync to get the GlobalTime. But to use NetSync I have
> to use the lowpower flag to make, correct? (e.g. make tmoteinvent MyApp
> lowpower). And by using the lowpower mode things doesn&#8217;t work as I
> would like to. For example the UART and radio is only enabled a short
> time period every two second.
>
> To get the UART up and running I did like this:
>
> call Timer.start(TIMER_REPEAT, 50);
>
> ...
>
> event result_t Timer.fired(){
>    if(call HPLUSARTControl.isUART() == FALSE)
>       call HPLUSARTControl.enableUART();
> }
>
> Is that ok? Or a bad idea?
>
> How can I get my network synchronized (with for example NetSync) but at
> the same time have full speed radio communication? And how do I switch
> between lowpower and full speed in runtime?
>
> Best regards,
> Henric
>
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> Tinyos-help at Millennium.Berkeley.EDU
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>

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