I have smatool running on a Raspberry PI under wheezy. When I run ./smatool it stops at the end and will not finish untill I hit enter twice.
pi@raspberrypi ~/bin/sma-bluetooth $ ./smatool
2013-02-13 06:50:03 Unit Serial = 3821139 none
2013-02-13 06:50:03 NO DATA for 1f 82 = 8001 NO UNITS
2013-02-13 06:50:03 NO DATA for 20 82 = 558 NO UNITS
2008-01-01 11:00:05 NO DATA for 21 82 = 601 NO UNITS
2008-01-01 11:00:05 NO DATA for 21 82 = 635 NO UNITS
2013-02-13 08:56:52 Total Power = 549 Watts
2013-02-13 08:56:51 Max Phase 1 = 3000 Watts
2013-02-13 08:56:51 Max Phase 2 = 3000 Watts
2013-02-13 08:56:51 Max Phase 3 = 3000 Watts
2013-02-13 08:56:51 Unknown = 0 Unknown
2013-02-13 08:56:51 Unknown = 0 Unknown
2013-02-13 08:56:52 Output Phase 1 = 549 Watts
2013-02-13 08:56:52 Output Phase 2 = 0 Watts
2013-02-13 08:56:52 Output Phase 3 = 0 Watts
2013-02-13 08:56:52 Line Voltage Phase 1Volts = 239 Volts
2013-02-13 08:56:52 Line Voltage Phase 2Volts = 0 Volts
2013-02-13 08:56:52 Line Voltage Phase 3Volts = 0 Volts
2013-02-13 08:56:52 Line Current Phase 1Amps = 2 Amps
2013-02-13 08:56:52 Line Current Phase 2Amps = 0 Amps
2013-02-13 08:56:52 Line Current Phase 3Amps = 0 Amps
2013-02-13 08:56:52 Grid Frequency = 50 Hertz
2013-02-13 08:56:51 NO DATA for 48 21 = 35 NO UNITS
2013-02-13 08:56:51 NO DATA for 49 41 = 302 NO UNITS
2013-02-13 08:56:51 NO DATA for 4a 41 = 336 NO UNITS
2013-02-13 08:56:51 NO DATA for 4b 41 = 302 NO UNITS
2013-02-13 08:56:52 NO DATA for 64 41 = 51 NO UNITS
2013-02-13 08:56:52 NO DATA for 65 41 = 557 NO UNITS
13/2/2013 08:50:00 total=3.220 Kwh current=0 Watts togo=0 i=11 crc=1083765064
13/2/2013 08:55:00 total=3.285 Kwh current=780 Watts togo=0 i=23 crc=1083765064