Issue Conversion with sdr driver and wind sensor WGR800

[Olivier Payrastre]

Hello,

I am trying to become independant from any hardware and keep mys sensors. So Im trying to use SDR protocol. I already succeed to interoperate with all my sensor, but having an issue on Wind Sensor.
I don't know why but my weewx station doesn't convert units from m/s to km/h on this sensor.

Here's the case :

sdr driver.
sensor WGR800 from Oregon Scientific.
weewx software : 3.9.2

Here's extract from my weewx.conf file :



[Station]

    # Description of the station location
    location = Albi - France

    # Latitude and longitude in decimal degrees
    latitude = 43.925
    longitude = 2.19235

    # Altitude of the station, with unit it is in. This is downloaded from
    # from the station if the hardware supports it.
    altitude = 179, meter

    # Set to type of station hardware. There must be a corresponding stanza
    # in this file with a 'driver' parameter indicating the driver to be used.
    station_type = SDR

[SDR]
    # This section is for the software-defined radio driver.

    # The driver to use
    driver = user.sdr
    [[sensor_map]]
        pressure = pressure.5:249.OSBTHGN129Packet
        inTemp = temperature.5:249.OSBTHGN129Packet
        outTemp = temperature.1:252.OSTHGR810Packet
        outHumidity = humidity.1:252.OSTHGR810Packet
        outTempBatteryStatus = battery.1:252.OSTHGR810Packet
        windSpeed = wind_speed.0:175.OSWGR800Packet
        windGust = wind_gust.0:175.OSWGR800Packet
        windDir = wind_dir.0:175.OSWGR800Packet
        windBatteryStatus = battery.0:175.OSWGR800Packet
        rainRate = rain_rate.0:71.OSPCR800Packet
        rain_total = rain_total.0:71.OSPCR800Packet
        rainBatteryStatus = battery.0:71.OSPCR800Packet
        UV = uv_index.1:151.OSUV800Packet
        extraTemp3 = temperature.4:42.OSTHGR810Packet
    [[deltas]]
        rain = rain_total

[StdReport]

    # Where the skins reside, relative to WEEWX_ROOT
    SKIN_ROOT = /etc/weewx/skins

    # Where the generated reports should go, relative to WEEWX_ROOT
    HTML_ROOT = /mnt/web/weewx

    # The database binding indicates which data should be used in reports.
    data_binding = wx_binding

    # Whether to log a successful operation
    log_success = True

    # Whether to log an unsuccessful operation
    log_failure = False

    ####

    # Each of the following subsections defines a report that will be run.
    # See the customizing guide to change the units, plot types and line
    # colors, modify the fonts, display additional sensor data, and other
    # customizations. Many of those changes can be made here by overriding
    # parameters, or by modifying templates within the skin itself.

    [[SeasonsReport]]
        # The SeasonsReport uses the 'Seasons' skin, which contains the
        # images, templates and plots for the report.
        skin = Seasons
        enable = true

    [[Belchertown]]
        HTML_ROOT = /mnt/web/weewx/belchertown
        skin = Belchertown
        [[[Extras]]]
            logo_image = ""
            theme = auto
            footer_copyright_text = BelchertownWeather.com
            forecast_enabled = 1
            forecast_alert_enabled = 1
            darksky_secret_key = 6b61abf8db2c217a3cc1a80fd8a1d9a2
            darksky_lang = fr
            earthquake_enabled = 1
            earthquake_maxradiuskm = 3000
            twitter_enabled = 1
            twitter_owner = PatOBrienPhoto
            mqtt_websockets_enabled = 1
            mqtt_websockets_host = mqtt.payrastre.fr
            mqtt_websockets_port = 9001
            mqtt_websockets_ssl = 1
            mqtt_websockets_topic = weather_dev/loop
            disconnect_live_website_visitor = 1800000
            station_observations = barometer, visibility, inTemp, dewpoint, outHumidity, rainWithRainRate, UV, extraTemp3
            site_title = Mon site météo
            manifest_name = Mon site météo
            manifest_short_name = Météo
  

    [[Defaults]]

        [[[Units]]]

            # The following section sets what unit to use for each unit group.
            # NB: The unit is always in the singular. I.e., 'mile_per_hour',
            # NOT 'miles_per_hour'
            [[[[Groups]]]]

                group_altitude = meter    # Options are 'foot' or 'meter'
                group_degree_day = degree_C_day    # Options are 'degree_F_day' or 'degree_C_day'
                group_pressure = hPa    # Options are 'inHg', 'mmHg', 'mbar', or 'hPa'
                group_rain = mm    # Options are 'inch', 'cm', or 'mm'
                group_rainrate = mm_per_hour    # Options are 'inch_per_hour', 'cm_per_hour', or 'mm_per_hour'
                group_speed = km_per_hour    # Options are 'mile_per_hour', 'km_per_hour', 'knot', or 'meter_per_second'
                group_speed2 = km_per_hour2    # Options are 'mile_per_hour2', 'km_per_hour2', 'knot2', or 'meter_per_second2'
                group_temperature = degree_C    # Options are 'degree_F' or 'degree_C'

            # The following section sets the formatting for each type of unit.
            [[[[StringFormats]]]]

                centibar = %.0f
                cm = %.2f
                cm_per_hour = %.2f
                degree_C = %.1f
                degree_F = %.1f
                degree_compass = %.0f
                foot = %.0f
                hPa = %.1f
                hour = %.1f
                inHg = %.3f
                inch = %.2f
                inch_per_hour = %.2f

                km_per_hour = %.0f

If i change driver, interceptor for example, units are correctly converted.µ

Here's my test site : http://www.payrastre.fr/weewx for Season Theme, and http://www.payrastre.fr/weewx/belchertown for Belchertown theme.

Any idea ?

Thanks for all.

Olivier.

[mwall]

hello olivier,

this looks like a bug in the weewx-sdr driver.  for the OSWGR800 sensor, the text parser uses unit system of METRICWX, but the JSON parser users a unit system of METRIC.

you can fix your weewx-sdr driver by changing this:

        pkt['usUnits'] = weewx.METRIC

to this:

        pkt['usUnits'] = weewx.METRICWX

in sdr.py at function OSWGR800Packet.parse_json (should be line 2097 in the latest sdr.py)

or just download the latest sdr.py.

m

[Olivier Payrastre]

Hello,

Thanks a lot. I applied first method cause it was easier. All is working fine now.

Olivier.