Hello,
I added a second data source to my WeeWx installation on RPI as it is
explained in the customization guide.
My database is metric.
So I imported a temperature 'AQM_Temp' in degree Celsius and a snow height
'Snow_height' in cm.
I assinged the 'group_temperature' as unit group to the signal 'AQM_Temp'
and defined the following new unit group for the snow height:
#Define unit groups which are not already defined
weewx.units.USUnits['group_snow_height'] = 'inch1'
weewx.units.MetricUnits['group_snow_height'] = 'cm1'
weewx.units.MetricWXUnits['group_snow_height'] = 'cm1'
weewx.units.default_unit_format_dict['inch1'] = '%.0f'
weewx.units.default_unit_label_dict['inch1'] = ' in'
weewx.units.default_unit_format_dict['cm1'] = '%.0f'
weewx.units.default_unit_label_dict['cm1'] = ' cm'
weewx.units.conversionDict['inch1'] = {'cm1': lambda x : x * 2.54}
weewx.units.conversionDict['cm1'] = {'inch1': lambda x : x * 0.394}
The signal 'AQM_Temp' is automatically converted from deg Farenheit to
Celsius, so from US unit to METRIC unit.
The signal 'Snow_height" is not converted at all and still is in cm after
importing it.
Even if I define a new unit group 'group_temperature2' with all the
conversion rules the signal 'AQM_Temp' is automatically converted to deg
Celsius (with the specified conversion calculation).
If I convert 'AQM_Temp' in deg Farenheit first and leave 'Snow_height' in
Celsius everything is fine even when assigning the unit group
'group_temperature'
I do not understand how WeeWx can seperate between those two signals and
why is is behaving different.
Maybe sombody has an idea.
Regards,
engolling
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