![Mini USB Bluetooth Adapter for PC, V5.0 Bluetooth Dongle for Windows 7/8/10/Vista/XP/Mac, for Bluetooth Headset/Speaker/Table]({"https://m.media-amazon.com/images/I/51fTpAQ8VAL._AC_SS130_.jpg":[130,130],"https://m.media-amazon.com/images/I/51fTpAQ8VAL._AC_SS260_.jpg":[260,260],"https://m.media-amazon.com/images/I/51fTpAQ8VAL._AC_SS390_.jpg":[390,390]})
I got this because it uses only one usb slot for two things I needed: Bluetooth and Wifi. And it does both well, but not without problems. I've been using this for a month or so with Raspian Wheezy (1-7-2014 version); both the BT and Wifi are recognized out of the box. The problems are not only specific to Cirago. They are problems with all BTs that use the Cambridge Silicon Radio chipsets, and Wifi's that use the Realtek 81xx chips.
First, the bluetooth. I'm using this to stream music from my tablet and phone to the Pi running Pulse Audio. When anything connects, it often (not always) crashes the Pi. You must add the following lines to the appropriate files:
# /etc/modules
hci_usb reset=1
# /etc/modprobe.d/raspi-blacklist.conf
blacklist hci_usb
And the BT part of the dongle should work reliably. Now, the Realtek-based wifi is so miserly with power, it tries to go to sleep any chance it gets, often as soon as the Pi boots up, effectively rendering itself useless after about 5 seconds or so (not very well designed, to say the least). You can (and should) turn off its power-saving feature. Folks at AdaFruit has a page recommending this for their specific wifi dongle, but it seems to be a problem for all Realtek-based wifi dongles. Just create the following file with the following line (Note: you probably don't have this file; so just create it):
# /etc/modprobe.d/8192cu.conf
options 8192cu rtw_power_mgnt=0 rtw_enusbss=1 rtw_ips_mode=1
Reboot your Pi, and you can realize the full power and beauty of this dongle. I don't use the hardwired ethernet anymore, accessing it exclusively via the wifi (current ssh session is about 5 days - still working). My iPad is constantly pumping music through the bluetooth without fail (sounds great too!).
On top of all this, I have a spare USB slot for things like thumb drive, USB microphone, etc. No need for keyboard or mouse, since the bluetooth will handle both with ease. Turning off the power-saving feature on the wifi could be a bummer, but really, get a decent power supply that will provide adequate amperage. I have a 5V/1A power supply I got from an old smartphone and it works perfectly. Right now, I have it plugged into Ankers 7-port USB 3.0 powered hub (which provides max. 5V/800mA per port), and it's been running like a champ. Actually, I have two Raspberry Pi's hooked up to it; no crashes so far.
And unlike what other posters said, both the BT and wifi are working fine - SIMULTANEOUSLY!
I'm not going to fault Cirago for the configuration changes you need to make. I'm knocking one star off, because it's quite expensive (almost the price of my Pi). But if you want to save one USB slot, this little guy is the only game in town.
EDIT: I just noticed that it flashes a blue light when my iPad is connected to it via the Bluetooth, and flashes red when disconnected. Hm.. nice little feature, gotta make use of that somehow.
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The silver shielding came off of the device and now it does not make connectivity with the USB port.
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