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I have a small device that has a bluetooth chip. I can see it through the GUI System Settings > Bluetooth, when adding and discovering a new bluetooth device nearby, but every time I try this command hcitool scan.,no devices can be found.

y@MyPC:~$ sudo hcitool scan
Scanning ...
y@MyPC:~$

Is the Bluetooth GUI using a different tool than hcitool to scan for bluetooth devices?

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1 Answer 1

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man hcitool lists the following option:

-i <hciX>
       The command is applied to device hciX , which must be the name of an
       installed Bluetooth device. If not specified, the command will be sent
       to the first available Bluetooth device.

I suspect your “small device” bluetooth chip is not the default hci0, so hcitool doesn't send commands to it unless you say so. To display available local devices, run:

hcitool dev

This will show a list of devices with their device names. Pick the one you want and execute e.g.

hcitool -i hci1 scan
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