hardware del bluetooth
en primer lugar, cabe comprobar si el sistema operativo detecta el hardware:
sudo bluetoothctl[NEW] Controller B8:27:EB:03:01:15 RB3 [default]
desactivar el bluetooth de la raspberry pi 3
nano /boot/config.txt
dtoverlay=pi3-disable-bt
servicio del bluetooth
sudo systemctl status bluetooth.service
bluetooth.service – Bluetooth service
Loaded: loaded (/lib/systemd/system/bluetooth.service; enabled)
Active: inactive