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 <u...@gmx.ch> 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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