Commented Unassigned: bthConnect() returned -1 after fresh Jessie-lite install [163]

I had to completely rebuild my RPI3, running Jessie-lite.

Running hcitool scan gave the following results using the RPI3's built-in BT:

```
pi@dosadi:~ $ hcitool scan
Scanning ...
00:80:25:A6:1C:A2 SMA003d SN: 213021XXX SN213021XXXX
```

Running SBFspot 331 gave the following results:

```
pi@dosadi:~ $ /usr/local/bin/sbfspot.3/SBFspot -v -finq -nocsv
SBFspot V3.1.5
Yet another tool to read power production of SMA solar inverters
(c) 2012-2015, SBF (https://sbfspot.codeplex.com)
Compiled for Linux (LE) 32 bit

Commandline Args: -v -finq -nocsv
Reading config '/usr/local/bin/sbfspot.3/SBFspot.cfg'
Warning: Ignoring keyword 'SynchTimeLow'
Warning: Ignoring keyword 'SynchTimeHigh'
Fri Sep 23 12:25:56 2016: INFO: Starting...
sunrise: 07:27
sunset : 19:32
Connecting to 00:80:25:A6:1C:A2 (1/15)
Connecting to 00:80:25:A6:1C:A2 (2/15)
Connecting to 00:80:25:A6:1C:A2 (3/15)
Connecting to 00:80:25:A6:1C:A2 (4/15)
Connecting to 00:80:25:A6:1C:A2 (5/15)
Connecting to 00:80:25:A6:1C:A2 (6/15)
Connecting to 00:80:25:A6:1C:A2 (7/15)
Connecting to 00:80:25:A6:1C:A2 (8/15)
Connecting to 00:80:25:A6:1C:A2 (9/15)
Connecting to 00:80:25:A6:1C:A2 (10/15)
Connecting to 00:80:25:A6:1C:A2 (11/15)
Connecting to 00:80:25:A6:1C:A2 (12/15)
Connecting to 00:80:25:A6:1C:A2 (13/15)
Connecting to 00:80:25:A6:1C:A2 (14/15)
Connecting to 00:80:25:A6:1C:A2 (15/15)
Fri Sep 23 12:26:10 2016: CRITICAL: bthConnect() returned -1
pi@dosadi:~ $
```

I had previously been running 315 on the same hardware without any problems. I also tried reinstalling 315 but that gave the same result [shown above; I didn't capture the 331 output but it's the same, except for the warnings].
Comments: What is the proposed solution?