y It looks quite normal usually like below, but I catched another error 
shown i the paragraph after this which gives maybe a better hint what could 
be going on.

Aug 28 15:40:24 fenixwx weewx[5432]: te923: read: address 0x020001
Aug 28 15:40:24 fenixwx weewx[5432]: te923: read: 5a 33 a2 51 51 c1 71 0a 
00 0a 87 c1 64 86 c1 61 32 c2 52 ff ff b1 3f 05 53 c1 11 00 07 00 04 17 00 
c1
Aug 28 15:40:24 fenixwx weewx[5432]: te923: read: address 0x00004c
Aug 28 15:40:24 fenixwx weewx[5432]: te923: read: 5a ff ff ff ff ff ff ff 
ff ff ff ff ff ff d8 67 00 06 93 ff ff 78 28 15 09 bc 3f c1 3f c9 3f db 3f 
ac
Aug 28 15:40:25 fenixwx weewx[5432]: manager: added record 2016-08-28 
15:40:00 CEST (1472391600) to database 'weewx.sdb'
Aug 28 15:40:25 fenixwx weewx[5432]: manager: added record 2016-08-28 
15:40:00 CEST (1472391600) to daily summary in 'weewx.sdb'
Aug 28 15:40:25 fenixwx weewx[5432]: reportengine: Running reports for 
latest time in the database.
Aug 28 15:40:25 fenixwx weewx[5432]: reportengine: Running report 
StandardReport
Aug 28 15:40:25 fenixwx weewx[5432]: te923: read: address 0x020001
Aug 28 15:40:25 fenixwx weewx[5432]: reportengine: Found configuration file 
/home/weewx/skins/Standard/skin.conf for report StandardReport
Aug 28 15:40:26 fenixwx weewx[5432]: engine: Main loop exiting. Shutting 
engine down.
Aug 28 15:40:26 fenixwx weewx[5432]: engine: Shutting down StdReport thread
Aug 28 15:40:28 fenixwx weewx[5432]: cheetahgenerator: Generated 14 files 
for report StandardReport in 3.23 seconds
Aug 28 15:40:30 fenixwx weewx[5432]: genimages: Generated 15 images for 
StandardReport in 1.42 seconds
Aug 28 15:40:30 fenixwx weewx[5432]: reportengine: copied 0 files to 
/home/weewx/public_html
Aug 28 15:40:30 fenixwx weewx[5432]: reportengine: Running report 
BootstrapReport
Aug 28 15:40:30 fenixwx weewx[5432]: reportengine: Cannot read skin 
configuration file /home/weewx/skins/Bootstrap/skin.conf for report 
BootstrapReport: Config file not found: 
"/home/weewx/skins/Bootstrap/skin.conf".
Aug 28 15:40:30 fenixwx weewx[5432]:         ****  Report ignored...
Aug 28 15:40:30 fenixwx weewx[5432]: reportengine: Running report FTP
Aug 28 15:40:30 fenixwx weewx[5432]: reportengine: Found configuration file 
/home/weewx/skins/Ftp/skin.conf for report FTP
Aug 28 15:40:30 fenixwx weewx[5432]: reportengine: FTP upload not 
requested. Skipped.
Aug 28 15:40:30 fenixwx weewx[5432]: reportengine: Running report RSYNC
Aug 28 15:40:30 fenixwx weewx[5432]: reportengine: Found configuration file 
/home/weewx/skins/Rsync/skin.conf for report RSYNC
Aug 28 15:40:30 fenixwx weewx[5432]: reportengine: rsync upload not 
requested. Skipped.
Aug 28 15:40:30 fenixwx weewx[5432]: engine: StdReport thread has been 
terminated
Aug 28 15:40:30 fenixwx weewx[5432]: engine: Caught WeeWxIOError: [Errno 
None] could not detach kernel driver from interface 0: Inga data 
tillgängliga
Aug 28 15:40:30 fenixwx weewx[5432]:     ****  Waiting 60 seconds then 
retrying...





*The next lines shows another error message which point on the libusb*Aug 
27 23:45:26 fenixwx weewx[3933]: reportengine: Found configuration file 
/home/weewx/skins/Rsync/skin.conf for report RSYNC
Aug 27 23:45:26 fenixwx weewx[3933]: reportengine: rsync upload not 
requested. Skipped.
Aug 27 23:45:26 fenixwx weewx[3933]: engine: StdReport thread has been 
terminated
Aug 27 23:45:26 fenixwx weewx[3933]: engine: Caught unrecoverable exception 
in engine:
Aug 27 23:45:26 fenixwx weewx[3933]:     ****  
/lib/arm-linux-gnueabihf/libusb-1.0.so.0: undefined symbol: libusb_strerror
Aug 27 23:45:26 fenixwx weewx[3933]:     ****  Traceback (most recent call 
last):
Aug 27 23:45:26 fenixwx weewx[3933]:     ****    File 
"/home/weewx/bin/weewx/engine.py", line 859, in main
Aug 27 23:45:26 fenixwx weewx[3933]:     ****      engine.run()
Aug 27 23:45:26 fenixwx weewx[3933]:     ****    File 
"/home/weewx/bin/weewx/engine.py", line 182, in run
Aug 27 23:45:26 fenixwx weewx[3933]:     ****      for packet in 
self.console.genLoopPackets():
Aug 27 23:45:26 fenixwx weewx[3933]:     ****    File 
"/home/weewx/bin/weewx/drivers/te923.py", line 1163, in genLoopPackets
Aug 27 23:45:26 fenixwx weewx[3933]:     ****      data = 
self.station.get_readings()
Aug 27 23:45:26 fenixwx weewx[3933]:     ****    File 
"/home/weewx/bin/weewx/drivers/te923.py", line 1867, in get_readings
Aug 27 23:45:26 fenixwx weewx[3933]:     ****      buf = 
self._read(0x020001)
Aug 27 23:45:26 fenixwx weewx[3933]:     ****    File 
"/home/weewx/bin/weewx/drivers/te923.py", line 1722, in _read
Aug 27 23:45:26 fenixwx weewx[3933]:     ****      buf = 
self._raw_read(addr)
Aug 27 23:45:26 fenixwx weewx[3933]:     ****    File 
"/home/weewx/bin/weewx/drivers/te923.py", line 1600, in _raw_read
Aug 27 23:45:26 fenixwx weewx[3933]:     ****      self.ENDPOINT_IN, 
self.READ_LENGTH, self.TIMEOUT)
Aug 27 23:45:26 fenixwx weewx[3933]:     ****    File 
"/usr/local/lib/python2.7/dist-packages/usb/legacy.py", line 182, in 
interruptRead
Aug 27 23:45:26 fenixwx weewx[3933]:     ****      return 
self.dev.read(endpoint, size, timeout)
Aug 27 23:45:26 fenixwx weewx[3933]:     ****    File 
"/usr/local/lib/python2.7/dist-packages/usb/core.py", line 918, in read
Aug 27 23:45:26 fenixwx weewx[3933]:     ****      
self.__get_timeout(timeout))
Aug 27 23:45:26 fenixwx weewx[3933]:     ****    File 
"/usr/local/lib/python2.7/dist-packages/usb/backend/libusb1.py", line 787, 
in intr_read
Aug 27 23:45:26 fenixwx weewx[3933]:     ****      timeout)
Aug 27 23:45:26 fenixwx weewx[3933]:     ****    File 
"/usr/local/lib/python2.7/dist-packages/usb/backend/libusb1.py", line 872, 
in __read
Aug 27 23:45:26 fenixwx weewx[3933]:     ****      _check(retval)
Aug 27 23:45:26 fenixwx weewx[3933]:     ****    File 
"/usr/local/lib/python2.7/dist-packages/usb/backend/libusb1.py", line 552, 
in _check
Aug 27 23:45:26 fenixwx weewx[3933]:     ****      raise 
USBError(_strerror(ret), ret, _libusb_errno[ret])
Aug 27 23:45:26 fenixwx weewx[3933]:     ****    File 
"/usr/local/lib/python2.7/dist-packages/usb/backend/libusb1.py", line 541, 
in _strerror
Aug 27 23:45:26 fenixwx weewx[3933]:     ****      return 
_lib.libusb_strerror(errcode).decode('utf8')
Aug 27 23:45:26 fenixwx weewx[3933]:     ****    File 
"/usr/lib/python2.7/ctypes/__init__.py", line 378, in __getattr__
Aug 27 23:45:26 fenixwx weewx[3933]:     ****      func = 
self.__getitem__(name)
Aug 27 23:45:26 fenixwx weewx[3933]:     ****    File 
"/usr/lib/python2.7/ctypes/__init__.py", line 383, in __getitem__
Aug 27 23:45:26 fenixwx weewx[3933]:     ****      func = 
self._FuncPtr((name_or_ordinal, self))
Aug 27 23:45:26 fenixwx weewx[3933]:     ****  AttributeError: 
/lib/arm-linux-gnueabihf/libusb-1.0.so.0: undefined symbol: libusb_strerror
Aug 27 23:45:26 fenixwx weewx[3933]:    ****  Exiting

I am running pi2

Distributor ID:    Debian
Description:    Debian GNU/Linux 7.11 (wheezy)
Release:    7.11
Codename:    wheezy

and the versio of the libusb is
ii  libusb-1.0-0:armhf                    
2:1.0.11-1                              armhf        userspace USB 
programming library
ii  libusb-1.0-0-dev                      
2:1.0.11-1                              armhf        userspace USB 
programming library development files

Thank you
Ulrik

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