Thanks Al,

Main application here is in a sea shipping container.

The key issues are RF communication (when in a GSM range of course) 
and power management due to the long haul journey including journey 
overland. Power supply has to be in the form of an additional battery.

Technical issue is to have minimal size OS and to be low in power
consumption.  And robust.
All ideas welcome.

- Eric Smith
Al Johnson said:
> On Tuesday 17 May 2011, Eric Smith wrote:
> > Hi
> > 
> > I am considering using the Freerunner as a mobile gateway to track
> > GPS on a vehicle and to receive data from wireless sensors in the
> > vehicle and send the sensor data and GPS data through GPRS.
> > 
> > We may need to plug a customised wireless device into the freerunner
> > usb. An external GSM and GPS antenna will be used. The device will
> > have to run reliably and be robust for 8 to 12 weeks, so that means
> > a customised battery.
> > 
> > Power use efficiency means putting keeping the device in low-power
> > consumption mode for most of the time and waking every 30 minutes
> > (say) for polling and transmitting.
> > 
> > Has anyone implemented such a solution or has ideas about feasibility?
> Nobody has talked about doing this IIRC, but it certainly sounds feasible. 
> External power can be supplied via the usb y-cable arrangement, so shouldn't 
> be a problem. atd-over-fso will let you wake from suspend to do what you want 
> on an interval.
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