Where I work we have an area that has some testing devices that are Bluetooth capable. They are self contained and are designed to connect to a PC via USB or Bluetooth in order to to provide an interface via a diagnostic port.
We used to use them over the Bluetooth connection but found that the devices were infinitely more reliable when simply hard wired to the PC via USB and using a long cable that's designed for the differential signaling interface used in testing.
The problem is, there's no way to turn the Bluetooth broadcasting off, and the vendor pretty much says that as well. So the one or two areas nearby that have to use the Bluetooth connection sometimes take an hour or so of fiddling to pair a replacement device if it gets damaged because of the 20 or so other devices that are always running in pairing mode and Windows 7 or 8 will show 20 Unknown devices and maybe one or two will identify themselves every scan. Funny thing, and this may not have been considered when designing, but the devices go into pairing mode whenever powered up, whether it is tapping into the power rail on the device being tested like it would normally do in BT mode, or USB. So if you're truly using it in BT mode, it only gets powered up when connected and pollution is low. But when tethered over USB, it is always on and broadcasting.
This also has a negative effect on the Wifi signal in that area even with brand new top of the line Cisco access points. (Yes the APs are 5GHz capable but because of interference issues that we encountered with some older equipment we have 5GHz turned off for now)
So given that we cannot make any hardware modifications to these testing devices to disable bluetooth does anyone have any ideas for impeding the BT signal? The testing devices are about as big as your entire hand and are affixed to the power pole near each computer station.
Anything done has to at least look presentable in the event the suits swing by for a visit, or bring an entourage of potential customers, yet also be doable without a bunch of expense.
I was thinking something along the lines of an inexpensive plastic box lined with some material like metal screen, foil, thin sheet metal etc.
Basically some kind of 2.4GHz Faraday cage.
We aren't yet equipped to monitor the Signal to Noise ratio of the Wifi in the area but that hopefully will be coming soon with some new monitoring software that we'll be getting. Really I can only just see what nearby PCs are doing. And the devices that NEED to run over BT, sometimes have issues with slow connection times or timeouts which I think are related to the BT pollution.
Any other ideas or suggestions?