[Tinyos-help] current consumption on MicaZ in tinyos-2.x

[Razvan Musaloiu-E.]

Hi!

On Wed, 28 Jun 2006, Martin Turon wrote:

>
> Hi Razvan,
>
> If you put the ATmega128L to extended standby, you should measure ~20uA.
>
> If the cc2420 radio oscillator is still on (but radio is in standby) you
> should measure a total system power of ~50uA.

Thank you Martin! :-)

So the values I'm getting are indeed too high. The question is: where is
the problem? Could someone at least check the value for Blink?

--
Razvan ME

> -----Original Message-----
> From: tinyos-help-bounces at Millennium.Berkeley.EDU
> Sent: Tuesday, June 27, 2006 3:15 PM
> To: tinyos-help at Millennium.Berkeley.EDU
> Subject: [Tinyos-help] current consumption on MicaZ in tinyos-2.x
>
> Hi!
>
> I'm trying to verify the current consumption on MicaZ and here are some
> results that I would like some feedback. :-)
>
> The first test I did was to run the Blink application and measure
> the current when the leds where off. The result was 0.14mA.
>
> The next test was to change the Scheduler.taskLoop code in
> tos/SchedulerBasicP.nc to put the mote in different power saving modes.
> The code I used, for entering in Extended Standby mode for example, was:
>
>   command void Scheduler.taskLoop()
>   {
>     for (;;)
>     {
>         MCUCR =
>           (MCUCR & 0xe3) | 1 << SE | (1 << SM2) | (1 << SM1) | (1 << SM0);
>
>         sei();
>         asm volatile ("sleep");
>         cli();
>     }
>
> The results I got are:
> - Idle: 3.94mA
> - ADC NR: 1.35mA
> - Power Down: 0.13mA
> - Power Save: 0.13mA
> - Standby: 0.27mA
> - Extended Standby: 0.27mA
>
> I performed the measurement using a Extech Multimeter [1] and I waited
> till the current stabilized. I power the mote using a 3V power source. The
> application I run is an empty one (just one component, MainC).
>
> So my question is: can someone confirm/infirm the above values? :-)
>
> And one more thing: I have a few MicaZ motes burned with some old code (a
> monitoring application) that achieves 0.07mA in the sleep mode. I tried to
> recompile the application with the current tinyos-1.x and the current
> consumption I got is 0.5mA. In the same tinyos-1.x I also run a Blink
> application which calls PowerManagement.enable() in the init() and I got
> 0.14mA.  Does anyone has any idea about what is the cause of the
> difference? :P
>
> [1] http://www.radioshack.com/product/index.jsp?productId=2104750
>
> Have a nice day!
> Razvan ME
>
>