[Tinyos-help] Different results to Battery Lifetime using Tmote Sky

[Xavier Orduña]

Hi,

If no low power operation is set, the average consumption is about 20-25 mA
(very aproximately) (depending on leds and Cpu).

Let's find your batteries capacity (in mAh) and divide.

most of AA batteries you can find out there, have about 2200 mAh.

xavi

On Thu, Aug 7, 2008 at 9:59 PM, Leah <underlea at gmail.com> wrote:

> Dear all,
>
> I'm trying to measure the batteries life time when using a TmoteSky (telosb). I would like to know whether ours results are acceptable.
>
> I used a modification of the Oscilloscope Application from TinyOS-1.x so that we only measure Temperature, according to the following characteristics:
>
> 1) Send 1 msg every 10 reading read (~1.2 sec);
> 2) each msg has 10 temperature readings;
> 3) Sampling interval 100 ms;
> 4) Packet length: 33bytes;
> 5) No power management was implemented;
> 6)Using tmotesky's default transmission power (we suppose its using the Maximum);
>
> 7) Using 2 AA Alkaline batteries (Cbatt 2450 mAh).
> 8) As Base Station I have another TmoteSky using the TOSBase application.
> 9) environment's temperature was +- 25 Celsius.
>
> I am using SerialForwarder in order to count the Packets Read.
>
> According to my test I had the following results:
>
> Battery Life time: 1h 40min
>
> Receive packets: 4931
>
> Somebody knows what are the parameters used for people who have reached
> measure battery lifetime around 3 and 10 days?
>
> and Somebody knows what is the maximum battery lifetime using oscope
> without low power management?
>
> Thank you very much,
>
> Leah
>
>
>
>
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>



-- 
Xavier Orduña
CTO

m: [+34] 615 475 065
@: xorduna at dexmatech.com

Dexma

Riu de l'or 35
ES-08034 Barcelona
t/f: [+34] 93 280 19 18
w: www.dexmatech.com
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