Internal pressure sensor

[Jeff Sadowski]

On Wed, Sep 30, 2009 at 4:18 PM, Mikhail Umorin <mikeumo at gmail.com> wrote:
> On Wednesday 30 September 2009 16:18:51 Christoph Mair wrote:
>> Hi,
>>
>> I successfully added a pressure sensor to my Freerunner. The BMP085 chip
>> from Bosch Sensortec is a small (5x5x1.5mm) chip which includes a pressure
>> and a temperature sensor. Power and I2C is enough to get it working. I
>> glued it next to the BT antenna. The wiki page contains some pictures:
>> http://wiki.openmoko.org/wiki/I2C_Pressure_Sensor
>> Sourcecode is available from http://gitorious.org/freerunner-navigation-
>> board/bmp085
>>
>> Christoph
>>
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>
> Cool!
>
> can be very helpful during mountain hiking (not that GPS does not help already
> -- but it may not be always available)
>

I'm wondering how much battery it draws probably not much but for
backing trips it might not be all that useful.
Bring extra charged batteries? What do others do for backpacking
trips. Seems all cellphones eat batteries and aren't smart enough to
stop searching for a signal when there is none.

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