Re: Freerunner as a mobile gateway -> shipping container
On Wednesday 18 May 2011, Eric Smith wrote: > Thanks Al, > > Main application here is in a sea shipping container. Good luck getting a signal when they're stacked! I guess you can find somewhere to stick the antennae where they won't be too vulnerable and have a fair chance of getting a signal. > 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. Battery, efficient dc-dc converter, y-cable. Do some current measurements and size accordingly. > Technical issue is to have minimal size OS and to be low in power > consumption. And robust. OpenEmbedded, OpenWRT, debian would all work. Choice is probably more personal preference and familiarity than anything technical. FSO provides control via dbus for most stuff if you don't want to do the low level stuff yourself. Remember to turn the GSM and GPS off before suspending! > All ideas welcome. Sounds like a bog standard monitoring job. Do you need something as powerful as the moko, or would an AVR do the job? > Thanks > > > 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. ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Freerunner as a mobile gateway -> shipping container
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. Thanks -- - 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. > > ___ > Openmoko community mailing list > community@lists.openmoko.org > http://lists.openmoko.org/mailman/listinfo/community ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: AtMoko v35 incoming SMS tone missing?
2011/5/18 Francesco De Vita : > Hi, I have a similar problem but only when I send a message long more than > one page, I explain: I send a sms, say it is long 2 pages, after that my > moko doesn't receive incoming sms and I have to restart it. But consider > that the issues with long sms' are old and to date they seem to be unsolved, > I don't know if it is really related to that issue. Yep, I'm one of the guys (there is at least another one) who missed SMS and I write indeed always very long SMS. Will see whether I find my OpenMoko and test it ... Jens ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Freerunner as a mobile gateway
Eric Smith writes: > 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? I've done something similar except that I didn't use an external GSM antenna. http://www.dealextreme.com/p/cable-style-dual-power-1000ma-usb-2-0-4-port-hub-13526 http://www.dealextreme.com/p/universal-usb-power-car-adapter-1000ma-688 ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Freerunner as a mobile gateway
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. ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
