[Om2008.9] How to power off Wifi?

[Carl Lobo]

I guess that's right. I have similar readings myself.

On Mon, Nov 17, 2008 at 3:57 PM, Matthias Apitz <guru at unixarea.de> wrote:
> El día Sunday, November 16, 2008 a las 01:49:57AM +0100, Minh Ha Duong escribió:
>
>> Le samedi 15 novembre 2008, Matthias Apitz a écrit :
>> >I don't know if it reduces the drawing of power (btw: what is the
>> >easiest method to measure it? pulling out the battery and measure the
>> >power consumption via the cable?);
>>
>>   I would use something like the attached "battery.py" script to measure
>> power.
>>
>> Minh
>
> Thanks for this; I have had an older version without the detailed
> information about power drain and so; It is a bit tricky to use such a
> Python tool to measure things because it has to much effect in the power
> consumption by its own; maybe I will just collect in the future the data
> from the /sys/... files and draw the figured later based on them;
>
> for now I've tested it with your "battery.py", here are the numbers:
>
>    181 mA  -- nearly empty FR (only "battery.py" and Terminal running)
>    231 mA  -- after launch of GPSD
>    183 mA  -- after stop of GPSD
> 189-232 mA  -- after Wifi-up with, running 'ping' through eth0
> 184-186 mA  -- after Wifi-down
>
> For me this reads that the Wifi chip is already powered-up on boot; the
> diff between before (181) and after using it (184-186) is not very big;
> right?
>
>        matthias
> --
> Matthias Apitz
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>
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