You are probably missing the underlying libusb "C" library.
Try running this test, using the Python interpreter. You type what's in
*bold*.
$ *python*
>>> *from ctypes.util import find_library*
>>> *print find_library('c')*
>>> *print find_library('usb-1.0')*
>>> *print find_library('usb-0.1')*
>>> *import usb.core*
>>> *print usb.core.find()*
-tk
On Thu, Aug 16, 2018 at 10:50 AM Cycle London <cycle.london...@gmail.com>
wrote:
> So I asked for your help a while back in migrating a faulty Pi install to
> a CentOS 7 box. I gave up then, because I thought that I'd be able to
> handle the constant crashes of the Pi, but having to unplug it and plug it
> back in three times a day is getting a bit much. And if we go away
> anywhere and it crashes..
>
> So I have a CentOS 7.5.1804 box up and running. The Oregon Scientific
> WMR300 weather station is recognised and appears in dmesg.
>
> This is a completely fresh install of weewx, in that although I have a
> complete back up of /home/weewx from the Pi, I have not transferred any of
> the files from the backup. Everything in /home/weewx on this VM, is
> 'pristine' from the install. I used the setup.py install. So...
>
> /etc/rc.d/init.d/weewx restart
> Aug 16 18:48:13 weather systemd: Stopping SYSV: start and stop the weewx
> weather system...
> Aug 16 18:48:13 weather weewx: Shutting down weewx: [FAILED]
> Aug 16 18:48:13 weather systemd: Starting SYSV: start and stop the weewx
> weather system...
> Aug 16 18:48:14 weather weewx[1854]: engine: Initializing weewx version
> 3.8.0
> Aug 16 18:48:14 weather weewx[1854]: engine: Using Python 2.7.5 (default,
> Jul 13 2018, 13:06:57) #012[GCC 4.8.5 20150623 (Red Hat 4.8.5-28)]
> Aug 16 18:48:14 weather weewx[1854]: engine: Platform
> Linux-3.10.0-862.11.6.el7.x86_64-x86_64-with-centos-7.5.1804-Core
> Aug 16 18:48:14 weather weewx[1854]: engine: Locale is 'en_GB.UTF-8'
> Aug 16 18:48:14 weather weewx[1854]: engine: pid file is /var/run/weewx.pid
> Aug 16 18:48:14 weather weewx[1858]: engine: Using configuration file
> /home/weewx/weewx.conf
> Aug 16 18:48:14 weather weewx[1858]: engine: Loading station type WMR300
> (weewx.drivers.wmr300)
> Aug 16 18:48:14 weather weewx: Starting weewx: [ OK ]
> Aug 16 18:48:14 weather weewx[1858]: wmr300: driver version is 0.18
> Aug 16 18:48:14 weather weewx[1858]: wmr300: usb info: pyusb_version=1.0.2
> Aug 16 18:48:14 weather weewx[1858]: wmr300: sensor map is {'outHumidity':
> 'humidity_1', 'extraDewpoint6': 'dewpoint_7', 'windchill': 'windchill',
> 'extraDewpoint4': 'dewpoint_5', 'rainRate': 'rain_rate', 'heatindex':
> 'heatindex_1', 'inTemp': 'temperature_0', 'windGustDir': 'wind_gust_dir',
> 'extraDewpoint2': 'dewpoint_3', 'extraDewpoint3': 'dewpoint_4',
> 'extraDewpoint1': 'dewpoint_2', 'barometer': 'barometer', 'extraDewpoint7':
> 'dewpoint_8', 'dewpoint': 'dewpoint_1', 'extraDewpoint5': 'dewpoint_6',
> 'extraHumid6': 'humidity_7', 'pressure': 'pressure', 'extraHumid4':
> 'humidity_5', 'extraHumid5': 'humidity_6', 'extraHumid2': 'humidity_3',
> 'extraHumid3': 'humidity_4', 'extraHumid1': 'humidity_2', 'extraTemp6':
> 'temperature_7', 'extraTemp7': 'temperature_8', 'extraTemp4':
> 'temperature_5', 'extraTemp5': 'temperature_6', 'extraTemp2':
> 'temperature_3', 'extraTemp3': 'temperature_4', 'extraTemp1':
> 'temperature_2', 'extraHeatindex3': 'heatindex_4', 'extraHeatindex2':
> 'heatindex_3', 'extraHeatindex1': 'heatindex_2', 'extraHeatindex7':
> 'heatindex_8', 'extraHeatindex6': 'heatindex_7', 'extraHeatindex5':
> 'heatindex_6', 'extraHumid7': 'humidity_8', 'extraHeatindex4':
> 'heatindex_5', 'windDir': 'wind_dir', 'outTemp': 'temperature_1',
> 'windSpeed': 'wind_avg', 'inHumidity': 'humidity_0', 'windGust':
> 'wind_gust'}
> Aug 16 18:48:14 weather systemd: Started SYSV: start and stop the weewx
> weather system.
> Aug 16 18:48:14 weather weewx[1858]: import of driver failed: No backend
> available (<class 'usb.core.NoBackendError'>)
> Aug 16 18:48:14 weather weewx[1858]: engine: Unable to load driver: No
> backend available
> Aug 16 18:48:14 weather weewx[1858]: **** Exiting...
>
> So near, and yet so far.....
>
> Thanks.
>
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