Thanks for the quick help
Hartmut
Am Samstag, 14. Januar 2017 13:55:57 UTC+1 schrieb gjr80:
>
> Not my night, instead of convert it is convertStd and you want .value not
> .snow_val:
>
> snow_total = convertStd(value_vt, event.record['usUnits']).value
>
> Gary
>
>
> On Saturday, 14 January 2017 22:39:49 UTC+10, Hartmut Schweidler wrote:
>>
>> Hallo
>>>
>>
>> my plan [snow] and [snowRate] , "cm", "group_snow"
>>
>> 1. /home/weewx/snow value 1.5 (cm) snow --> it is the value of the
>> file snow
>> 2. snowhes.py reads the value of [snow] (1.5)
>> 3. Write the value 1.5 to database (1.5 cm) as [snowRate] --> the
>> result of the current snow
>> 4. and find the value between current 1.5 (cm) [snowRate] in database
>> an the value snow current /home/weewx/snow
>> 5. the 'delta' [snowRate] and [snow] value
>> 1.5 - 1.5 result 0.0
>> 6. the result 0.0 write as [snow] in to database
>>
>> I hope to be able to represent
>> 1. $current.snowl = 0.0 cm
>> 2. Today 1.5 cm snow
>> 3. last snow by change "lastrain.py" on 10.01.2017 09:00
>> 1 day, 12
>> hours, 34 minutes ago
>>
>> and now the syslog result
>>
>> Jan 14 13:06:11 wetterba weewx[2651]: snowdepth: SNOW value of 1.5
>> Jan 14 13:06:11 wetterba weewx[2651]: snowdepth: found usUnits of 16
>> Jan 14 13:06:11 wetterba weewx[2651]: engine: Caught unrecoverable
>> exception in engine:
>> Jan 14 13:06:11 wetterba weewx[2651]: **** 16
>> Jan 14 13:06:11 wetterba weewx[2651]: **** Traceback (most recent
>> call last):
>> Jan 14 13:06:11 wetterba weewx[2651]: **** File
>> "/home/weewx/bin/weewx/engine.py", line 847, in main
>> Jan 14 13:06:11 wetterba weewx[2651]: **** engine.run()
>> Jan 14 13:06:11 wetterba weewx[2651]: **** File
>> "/home/weewx/bin/weewx/engine.py", line 158, in run
>> Jan 14 13:06:11 wetterba weewx[2651]: ****
>> self.dispatchEvent(weewx.Event(weewx.STARTUP))
>> Jan 14 13:06:11 wetterba weewx[2651]: **** File
>> "/home/weewx/bin/weewx/engine.py", line 222, in dispatchEvent
>> Jan 14 13:06:11 wetterba weewx[2651]: **** callback(event)
>> Jan 14 13:06:11 wetterba weewx[2651]: **** File
>> "/home/weewx/bin/weewx/engine.py", line 501, in startup
>> Jan 14 13:06:11 wetterba weewx[2651]: ****
>> self._catchup(self.engine.console.genStartupRecords)
>> Jan 14 13:06:11 wetterba weewx[2651]: **** File
>> "/home/weewx/bin/weewx/engine.py", line 606, in _catchup
>> Jan 14 13:06:11 wetterba weewx[2651]: **** origin='hardware'))
>> Jan 14 13:06:11 wetterba weewx[2651]: **** File
>> "/home/weewx/bin/weewx/engine.py", line 222, in dispatchEvent
>> Jan 14 13:06:11 wetterba weewx[2651]: **** callback(event)
>> Jan 14 13:06:11 wetterba weewx[2651]: **** File
>> "/home/weewx/bin/user/snowhes.py", line 57, in newArchiveRecord
>> Jan 14 13:06:11 wetterba weewx[2651]: **** snow_total =
>> convert(value_vt, event.record['usUnits']).snow_val
>> Jan 14 13:06:11 wetterba weewx[2651]: **** File
>> "/home/weewx/bin/weewx/units.py", line 1189, in convert
>> Jan 14 13:06:11 wetterba weewx[2651]: **** conversion_func =
>> conversionDict[val_t[1]][target_unit_type]
>> Jan 14 13:06:11 wetterba weewx[2651]: **** KeyError: 16
>> Jan 14 13:06:11 wetterba weewx[2651]: **** Exiting.
>>
>> my file snowhes.py
>> """Put this file, snow.py, in the weewx 'user' directory, then modify
>> weewx.conf
>> with something like this:
>>
>> [SnowDepth]
>> filename = /home/weewx/snow
>>
>> To use as a service:
>>
>> [Engine]
>> [[Service]]
>> data_services = user.snowhes.SnowDepth
>> """
>> import syslog
>> import weewx
>> from weewx.engine import StdService
>> from weewx.units import ValueTuple, convert
>>
>> class SnowDepth(StdService):
>> def __init__(self, engine, config_dict):
>> super(SnowDepth, self).__init__(engine, config_dict)
>> self._last_snow = 0.0
>> d = config_dict.get('SnowDepth', {})
>> self.filename = d.get('filename', '/home/weewx/snow')
>> syslog.syslog(syslog.LOG_INFO, "snowdepth: using %s" %
>> self.filename)
>> self.bind(weewx.NEW_ARCHIVE_RECORD, self.newArchiveRecord)
>>
>> def newArchiveRecord(self, event):
>> #try:
>> with open(self.filename) as f:
>> snow_val = f.read()
>> syslog.syslog(syslog.LOG_DEBUG, "snowdepth: found value of
>> %s" % snow_val)
>> syslog.syslog(syslog.LOG_INFO, "snowdepth: SNOW value of %s"
>> % snow_val)
>>
>>
>> # Convert our value to a type ValueTuple. We know it is in cm
>> and
>> # let's use group_snow (could use group_length too)
>> value_vt = ValueTuple(float(snow_val), 'cm', 'group_snow')
>> # Now convert the cm value to the same units as used in our
>> record
>> # The unit system of the record is in the records 'usUnits'
>> field
>> snow_total = convert(value_vt,
>> event.record['usUnits']).snow_val
>>
>> #event.record['some_field_name'] = value_conv
>> syslog.syslog(syslog.LOG_INFO, "snowdepth: found SNOW-value
>> of %s" % snow_total)
>> delta = weewx.wxformulas.calculate_rain(snow_total,
>> self._last_snow)
>> self._last_snow = float(snow_total)
>>
>> event.record['snowRate'] = float(self._last_snow)
>> event.record['snow'] = float(delta)
>> #except Exception, e:
>> syslog.syslog(syslog.LOG_ERR, "snowdepth: SYSLOG ERR cannot
>> read value: %s" % e)
>>
>>
>>
>
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