I am having a Bluetooth pairing problem. I am using an HC-05 hooked to an arduino UNO. The first tie it paired up just fine. BUtr, after I cycled power on the arduino the available devices no longer listed "HC-05", but the numerical id 20:16:04:11:38:56 and when I tried to pair I get a "Can't communicate with device" error. Rebooting rpi 3, even cycling power does nothing. So it paired the first time, but no more.