www.pc-wetterstation.de

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    [[Defaults]]
 .....      
        # Which unit system to use for all reports. Choices are 'us', 'metric', or 'metricwx'.
        # You can override this for individual reports.
        unit_system = metricwx
        
        [[[Units]]]
          
            # Option "unit_system" above sets the general unit system, but overriding specific unit
            # groups is possible. These are popular choices. Uncomment and set as appropriate.
            # NB: The unit is always in the singular. I.e., 'mile_per_hour',
            # NOT 'miles_per_hour'
            [[[[Groups]]]]
......                
                group_speed = km_per_hour    # Options are 'mile_per_hour', 'km_per_hour', 'knot', or 'meter_per_second'

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group_speed2 = km_per_hour2    # Options are 'mile_per_hour2', 'km_per_hour2', 'knot2', or 'meter_per_second2'

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pu = packet.get('usUnits')

def convert(v, metric, group, from_unit_system, to_units):
    ut = weewx.units.getStandardUnitType(from_unit_system, metric)
    vt = (v, ut[0], group)
    v = weewx.units.convert(vt, to_units)[0]
    return v
    
data['windSpeed'] = convert(v, 'windSpeed', 'group_speed', pu, 'km_per_hour')
fields.append("%.1f," % float(data['windSpeed']))

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sqlite3  --header -csv /var/lib/weewx/weewx_eco.sdb "select dateTime,outTemp, outHumidity,barometer, rain,rainRate, windspeed, windDir from archive order by datetime desc limit 1;" > /home/pi/daten.csv

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[StdConvert]
    
    # The target_unit affects only the unit system in the database. Once
    # chosen it cannot be changed without converting the entire database.
    # Modification of target_unit after starting weewx will result in
    # corrupt data - the database will contain a mix of US and METRIC data.
    #
    # The value of target_unit does not affect the unit system for
    # reporting - reports can display US, Metric, or any combination of units.
    #
    # In most cases, target_unit should be left as the default: US
    #
    # In particular, those migrating from a standard wview installation
    # should use US since that is what the wview database contains.
    
    # DO NOT MODIFY THIS VALUE UNLESS YOU KNOW WHAT YOU ARE DOING!
    target_unit = US    # Options are 'US', 'METRICWX', or 'METRIC'

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[StdReport] 
        [[WerteReport]]
        # The WerteReport uses the 'Werte' skin and the file
        # is placed in a dedicated subdirectory.
        skin = Werte
        enable = true
        HTML_ROOT = /var/www/html/weewx/werte

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outTemp;outHumidity;barometer;windSpeed;rain;rainrate;dateTime
Temperatur : $current.outTemp (Δ $trend.outTemp)
Luftfeuchte : $current.outHumidity
Luftdruck : $current.barometer (Δ $trend.barometer)
Wind : $current.windSpeed $gettext("aus") $current.windDir.ordinal_compass ($current.windDir)
Regen : $current.rain (Σ $day.rain.sum)
Regenrate : $current.rainRate
$current.dateTime