[HOT] Smartphones using wifi in the field If you ain't in the field or techie ignore this post.

Katja Ulbert mail at katja-ulbert.de
Wed Feb 3 12:00:20 UTC 2016


Thanks for this valuable information, John!

On 31/01/16 22:34, Pete Masters wrote:
>
> Really interesting, John.... Thanks for the post. Just conducted 
> training in DRC on data collection and base mapping. We tried to focus 
> as much as possible on offline solutions. Wish I'd read this before 
> we'd been, not just after! ;)
>
> Pete
>
> On 31 Jan 2016 20:35, "john whelan" <jwhelan0112 at gmail.com 
> <mailto:jwhelan0112 at gmail.com>> wrote:
>
>     I've been playing around with Serval software on Android. Ideally
>     it needs a wifi mesh set up using multiple firmware modified
>     TP-Link MR3020 portable routers with custom software connected to
>     a small radio device which turns it into a mesh extender.
>
>     The original concept was to turn the smartphone into a router but
>     the latest Android software well anything above 2.2 denies access
>     to do this.  Besides which rooting the phone in this manner is not
>     good from the security point of view.
>
>     However if you are running Windows 10 and your Laptop supports it,
>     most should, you can turn your laptop into a wifi hot spot that
>     other devices can connect to. Note you should not need to be
>     connected to the Internet for this to work.
>
>     Translation Android smartphones running Serval within say 100
>     meters of the laptop  can now talk to each other.  I haven't tried
>     a phone call, I don't have two Smartphones to hand, but messaging
>     certainly works.
>
>     You should also be able to transfer files certainly from one
>     smartphone to another and if Serval doesn't support file transfer
>     to the host laptop there are other apps around that do.  So things
>     like the latest maps for Osmand etc can be brought down once to
>     the laptop then propagated out to smartphones or a smartphone sent
>     by mail, mule etc to the wifi hub can then connect and distribute
>     files etc.
>
>     I haven't looked at the implications of interconnecting laptops
>     perhaps with cat 5 cables and although phone calls should be fine
>     across one wifi hub theoretically each hub used in the hops adds a
>     small delay so voice quality over multiple hops may not be ideal.
>
>     Cheerio John
>
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