i change the name of the module from BCM20702A1-0a5c:21e8.ehcd to BCM20702A0-0a5c:21e8.ehcd This time module BCM20702A0-0a5c:21e8.ehcd is loaded ! For the first time after pc startup I saw the bluetooth adapter in sleep mode. If I enable Bluetooth then I see the blue light of the adapter. But sadly if I disable Bluetooth then the blue light does not disappear. I assume the adapter does not switch to sleep mode.