Hi Thomas.
The results of the tests are below.
********
[root@weather ~]# python
Python 2.7.5 (default, Jul 13 2018, 13:06:57)
[GCC 4.8.5 20150623 (Red Hat 4.8.5-28)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from ctypes.util import find_library
>>> print find_library('c')
libc.so.6
>>> print find_library('usb-1.0')
libusb-1.0.so.0
>>> print find_library('usb-0.1')
libusb-0.1.so.4
>>> import usb.core
>>> print usb.core.find()
DEVICE ID 1d6b:0002 on Bus 001 Address 001 =================
bLength : 0x12 (18 bytes)
bDescriptorType : 0x1 Device
bcdUSB : 0x200 USB 2.0
bDeviceClass : 0x9 Hub
bDeviceSubClass : 0x0
bDeviceProtocol : 0x0
bMaxPacketSize0 : 0x40 (64 bytes)
idVendor : 0x1d6b
idProduct : 0x0002
bcdDevice : 0x310 Device 3.1
iManufacturer : 0x3 Linux 3.10.0-862.11.6.el7.x86_64 ehci_hcd
iProduct : 0x2 EHCI Host Controller
iSerialNumber : 0x1 0000:02:03.0
bNumConfigurations : 0x1
CONFIGURATION 1: 0 mA ====================================
bLength : 0x9 (9 bytes)
bDescriptorType : 0x2 Configuration
wTotalLength : 0x19 (25 bytes)
bNumInterfaces : 0x1
bConfigurationValue : 0x1
iConfiguration : 0x0
bmAttributes : 0xe0 Self Powered, Remote Wakeup
bMaxPower : 0x0 (0 mA)
INTERFACE 0: Hub =======================================
bLength : 0x9 (9 bytes)
bDescriptorType : 0x4 Interface
bInterfaceNumber : 0x0
bAlternateSetting : 0x0
bNumEndpoints : 0x1
bInterfaceClass : 0x9 Hub
bInterfaceSubClass : 0x0
bInterfaceProtocol : 0x0
iInterface : 0x0
ENDPOINT 0x81: Interrupt IN ==========================
bLength : 0x7 (7 bytes)
bDescriptorType : 0x5 Endpoint
bEndpointAddress : 0x81 IN
bmAttributes : 0x3 Interrupt
wMaxPacketSize : 0x4 (4 bytes)
bInterval : 0xc
>>>
********
On Thursday, 16 August 2018 19:29:05 UTC+1, Thomas Keffer wrote:
>
> 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.l...@gmail.com
> <javascript:>> 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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