Wlk Converter

Multi-platform tool to convert binary wlk files from Davis Weather Instruments, to csv file. This is a needed step to, for example, import your WeatherLink wlk files to a different data collecting software like Weewx.

The tool is multi-platform, flexible - providing fine-grained control to the output (unit system, printed fields, fields sorting, csv header) -, powerful - allowing to convert entire folders of wlk files with no required interaction -, and highly tested (test-coverage close to 100%):

Package	Class, %	Method, %	Line, %
all classes	98% (48/49)	96.4% (269/279)	97.9% (925/945)

Usage

Basic usage: download the latest release, place it in a folder containing one or more wlk files, and launch it with no options:

java -jar wlk-converter.jar

for each wlk file, two csv files will be created: one with all the daily records, and one with the daily summaries.

To avoid printing the whole list of fields available in the wlk archive, you have to provide a text file with the list of desired fields. A template-like text file with the full list of fields is here available in the assets folder with the name fullListOfFields.txt: simply edit it, and then pass it to the command:

java -jar wlk-converter.jar -p desiredFields.txt

It is possible to specify an input folder different from the current one, or directly a single wlk file. Also a different output folder could be defined:

java -jar wlk-converter.jar \
    -i /path/to/folder/with/wlk-files \
    -o /path/to/output-folder \
    -p desiredFields.txt

To know more about options to control the unit system and the output files content like header, or fields sorting, see the Details section

Details

Options:
    --version, -v -> Print version 
    --input, -i -> Input file path { String }
    --output, -o -> Output folder path { String }
    --unit, -u -> Unit system used for values in the printed output { Value should be one of [si, imperial] }
    --skip-header, -s [false] -> Skip header printing 
    --output-format, -f [CSV] -> Format for output file { Value should be one of [csv] }
    --fields-file, -p -> Path to file containing list of fields printed in output { String }
    --help, -h -> Usage info  

1. wlk file names must be in the format YYYY-MM.wlk

2. -v to print version.

3. -i is optional: if no path is provided the output will be saved in the current folder. As -i option you can provide a single file, or a folder. Multiple input are accepted, also mixed. E.g. of allowed input:

   • -i /path/to/my/2021-01.wlk
   • -i /path/to/my/2021-01.wlk -i /path/to/my/2021-02.wlk -i /path/to/my/2021-03.wlk -i /path/to/my/2021-04.wlk
   • -i /path/to/my/wlk/folder
   • -i /path/to/my/wlk/folder -i /path/to/another/wlk/folder
   • -i /path/to/my/wlk/folder -i /path/to/my/2021-01.wlk -i /path/to/my/2021-02.wlk -i /path/to/another/wlk/folder

4. -o is optional: if no path is provided the output will be saved in the current folder. Output files are always named as DailySummary_${yyyy}-${mm}.${ext} and DailyData_${yyyy}-${mm}.${ext}.

5. -u is optional. Used to choose between International Unit System, and Imperial Unit System in the printed output. If it is not provided default values.

   Default values: Length:kilometre, Precipitation:millimetre, Pressure:hectopascal, RainRate:millimetreperhour, Speed:kilometreperhour, Temperature:celsius

   SI values: Length:metre, Precipitation:millimetre, Pressure:pascal, RainRate:millimetreperhour, Speed:metrepersecond, Temperature:celsius

   Imperial values: Length:mile, Precipitation:inch, Pressure:inchesofmercury, RainRate:inchperhour, Speed:mileperhour, Temperature:fahrenheit

6. -s: is optional. Used to don't print the header in the generated csv files. Default: false.

7. -f: at the moment is not used, since only csv is supported as output format

8. -p is optional: path to text files with list of fields to be printed in output.

   To define daily data fields to be printed, begin the line with DAILY_DATA_FIELDS: header, and then specify a comma separated values list of fields.

   To define daily summary fields to be printed, begin the line with DAILY_SUMMARY_FIELDS: header, and then specify a comma separated values list of fields.

   Example:

   DAILY_DATA_FIELDS:date,time,outsideTemp,outsideHum,windSpeed,windDirection
   DAILY_SUMMARY_FIELDS:hiOutTemp,hiOutTempTime,hiBar,hiBarTime
   

   Fields will be printed in the same order as defined in the file. If no path is provided or if the corresponding line is missing all the fields will be printed. If no fields follow the line header, then the related output file will not be printed.

   Available fields (here grouped by affinity for reading convenience):

   • Daily Summary fields:
     • Inside
       • Temperature: hiInTemp, hiInTempTime, avgInTemp, lowInTemp, lowInTempTime
       • Humidity: hiInHum, hiInHumTime, lowInHum, lowInHumTime
     • Outside
       • Temperature: hiOutTemp, hiOutTempTime, avgOutTemp, lowOutTemp, lowOutTempTime, hiChill, hiChillTime, avgChill, lowChill, lowChillTime, hiDew, hiDewTime, avgDew, lowDew, lowDewTime, hiWetBulb, avgWetBulb, lowWetBulb
       • Humidity: hiOutHum, hiOutHumTime, avgOutHum, lowOutHum, lowOutHumTime
       • Pressure: hiBar, hiBarTime, avgBar, lowBar, lowBarTime
       • Wind: hiSpeed, dirHiSpeed, hiSpeedTime, avgSpeed, dailyWindRunTotal, hi10MinSpeed, hi10MinSpeedTime, hi10MinDir, minutesAsDominantDirection
       • Rain: dailyRainTotal, hiRainRate, hiRainRateTime
       • Other: dailyUVDose, hiUV, hiUVTime, hiHeat, hiHeatTime, avgHeat, lowHeat, lowHeatTime, hiTHSW, hiTHSWTime, lowTHSW, lowTHSWTime, hiTHW, hiTHWTime, lowTHW, lowTHWTime
     • Other: date, integratedHeatDD65, integratedCoolDD65, dataSpan, numWindPackets, hiSolar, dailySolarEnergy, minSunlight, dailyETTotal
   • Daily Data fields:
     • Inside: insideTemp, insideHum
     • Outside
       • Temperature: outsideTemp, hiOutsideTemp, lowOutsideTemp,
       • Humidity: outsideHum
       • Pressure: barometer
       • Wind: windSpeed, hiWindSpeed, windDirection, hiWindDirection
       • Rain: rain, hiRainRate
       • Other: solarRad, hisolarRad, UV, hiUV, extraRad, ET
     • Other: dateTime, date, time, archiveInterval, packedTime, numWindSamples