[chbot] Group project: Wireless remote security monitor

Andy ZL3AG zl3ag at radioengineering.com
Sat Apr 21 07:26:59 BST 2018



On 21/04/2018, at 4:10 PM, Mark Atherton wrote:

> Interesting...
> 
> Some random thoughts...
> 
> Why the 10GHz link, what is the traffic, is freq. just for privacy ?
> 

Sorry. Brain fart. 2.4FGHz/5GHz Wifi.

Also to use as Rx to ID as many RF devices as possible that they make be carrying on them.

> Bluetooth MAC "Bluetooth devices are assigned addresses similarly to Ethernet - an organizationally unique identifier (OUI) of 3 bytes followed by another 3 bytes assigned by the vendor. The Bluetooth address of a given device is almost certainly independent of an Ethernet MAC address. Bluetooth OUI lookup tools can be found on Google", from the ever popular, and sometimes correct Wikipedia.
> 
> Assuming that the burglars are using commercial drones, then presumably only one OUI will be used per manufacturer(?) That may allow you to exclude a large number of mobile phone manufacturers from the alarm list.
> 
> Sounds like you might need a 2.4GHz omi, at some height with a pre-amp - assuming you can sniff MACs without having to connect to the device (assume Bluetooth devices broadcast their MAC after association, just as part of packet transfer).
> 
> Not sure if drones will be switched on when passing NZTA's bluetooth traffic monitoring system.

That's to ID and track their iPhone/Android bluetooth, not the drone.


> 
> Just wondering, if you could design a 2.4GHz sky-pointing antenna, then any WiFi or Bluetooth traffic would be interesting to record, since its really should all be at ground level.
> 
> Saying this all out loud, 2.4GHz traffic received using directional antenna, pointing straight up may be a cause for concern.
> 
> Lets keep thinking about this...
> 

Yes please.

> -Mark
> 




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