Hi, thanks for replying,
my problem is not with the device, it works perfectly eat the image:
but with rfkill does not work in an image systemd.
I built an image in the footsteps of the website: http://www.angstrom-distribution.org/building-angstrom
however when running the command: rfkill unblock all
beaglebone root @ etc / opkg # rfkill unblock all
Can not open rfkill control device: No such file or directory