1 2 3 | arianna@arianna-laptop:/usr/share/doc/bluez/examples$ sdptool search --bdaddr 3C:18:9F:5C:4F:57 DUN | grep Channel arianna@arianna-laptop:/usr/share/doc/bluez/examples$ sdptool search --bdaddr 3C:18:9F:5C:4F:57 DUN | grep Channel arianna@arianna-laptop:/usr/share/doc/bluez/examples$ |