Urs etc:
Thanks for the information. I 'd like to make sure I understand your setup:
+-----------------------------+---------------------------------------------------+
|
| |
mote battery resistor (1 or 10 Ohm)
Oscilloscope or multimeter
|
| |
+-----------------------------+---------------------------------------------------+
Is this a correct description?
Another question: did you ever look into PowerTOSSIM as a simulation tool
for power consumption? I asked the question yesterday but no one has
responded yet.
Thanks.
David
On Wed, May 13, 2009 at 11:50 PM, Urs Hunkeler <[email protected]> wrote:
> Hi David,
>
> I use a high-precision 1 Ohm or 10 Ohm resistor connected in series between
> the mote and a laboratory power supply set to 3V. I then measure the voltage
> over the resistor with a digital oscilloscope. This allows me to sample the
> power consumption at a high frequency and thus distinguish between different
> phases of operation (radio turning on vs. listening vs. actually sending
> data).
>
> Cheers,
> Urs
>
>
>
> David Li wrote:
>
>> Hi,
>>
>> This is probably an age old question that was asked many times. I did
>> search
>> the archive but didn't find exactly what I was looking for. I am using
>> TinyOS 2.1 on Ubuntu 9.10 on Iris motes.
>>
>> What's kind of instruments do people normally use to measure current and
>> power consumptions? What's the standard practice to use these on motes
>> running TinyOS2.1?
>>
>> I have heard about NI and Agilent. But I am hoping someone can point me to
>> some detailed example or documentation.
>>
>> Thanks.
>>
>> David
>>
>
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