WH1080 weather station missing barometric pressure

[Reese Lind]

Just finished putting Weewx on a spare Raspberry Pi so I could retire the Lynksis NSLU2 that the station has been running through for the past few years.

The install went without issue and data appeared on both Weather Underground and my website (http://www.ecosprog.com/weather/) with the exception of the barometric pressure. I am using METRIC and have the correct pressure range set in the weewx.conf file. The pressure units are set to mPa and the range is 980 to 1050. I have also tried changing the units to mbar with the same range but this makes no difference.

I´m sure I am missing something really simple here but despite reading all the post here I haven´t been able to find any ideas of how to fix this issue. I should point out that with the old setup (NSLU2/Meteohub) i have no problem with logging the pressure.

Any suggestions where I can begin to look would be greatly appreciated.

[Thomas Keffer]

Hello, Reese

Please stop weewx, set debug=1, restart, then post the system log from the startup of weewx.

When you do this, run it from the command line and note very closely what it prints out for the observation value 'barometer'. Does it say 'None'? Or, does it give a value?

-tk

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Tom Keffer

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[Reese Lind]

Hi Tom,

Wow, thanks for the quick reply.

I have run weewx from the command line but it doesn´t output anything. I used ./bin/weewxd.py weewx.conf but should I be using another command to run the loop routine?

The output from ´syslog´ shows nothing abnormal from what I can see. Here is the output from the last restart.

Feb 10 19:01:50 raspberrypi weewx[1912]: wxengine: Loading service weewx.wxengine.StdTimeSynch

Feb 10 19:01:50 raspberrypi weewx[1912]: wxengine: Finished loading service weewx.wxengine.StdTimeSynch

Feb 10 19:01:50 raspberrypi weewx[1912]: wxengine: Loading service weewx.wxengine.StdPrint

Feb 10 19:01:50 raspberrypi weewx[1912]: wxengine: Finished loading service weewx.wxengine.StdPrint

Feb 10 19:01:50 raspberrypi weewx[1912]: wxengine: Loading service weewx.wxengine.StdRESTful

Feb 10 19:01:50 raspberrypi weewx[1912]: wxengine: Data will be posted to Wunderground

Feb 10 19:01:50 raspberrypi weewx[1912]: wxengine: Data will not be posted to PWSweather

Feb 10 19:01:50 raspberrypi weewx[1912]:     ****  'station'

Feb 10 19:01:50 raspberrypi weewx[1912]: wxengine: Data will not be posted to CWOP

Feb 10 19:01:50 raspberrypi weewx[1912]:     ****  'station'

Feb 10 19:01:50 raspberrypi weewx[1912]: wxengine: Started thread for RESTful upload sites.

Feb 10 19:01:50 raspberrypi weewx[1912]: wxengine: Finished loading service weewx.wxengine.StdRESTful

Feb 10 19:01:50 raspberrypi weewx[1912]: wxengine: Loading service weewx.wxengine.StdReport

Feb 10 19:01:50 raspberrypi weewx[1912]: wxengine: Finished loading service weewx.wxengine.StdReport

Feb 10 19:01:50 raspberrypi weewx[1912]: wxengine: Starting up weewx version 2.1.1.

Feb 10 19:01:50 raspberrypi weewx[1912]: wxengine: Starting main packet loop.

Feb 10 19:01:50 raspberrypi weewx[1912]: wxengine: Station does not support reading the time

Feb 10 19:03:21 raspberrypi dbus[1799]: [system] Activating service name='org.freedesktop.ConsoleKit' (using servicehelper)

Feb 10 19:03:22 raspberrypi dbus[1799]: [system] Activating service name='org.freedesktop.PolicyKit1' (using servicehelper)

Feb 10 19:03:22 raspberrypi polkitd[2003]: started daemon version 0.105 using authority implementation `local' version `0.105'

Feb 10 19:03:22 raspberrypi dbus[1799]: [system] Successfully activated service 'org.freedesktop.PolicyKit1'

Feb 10 19:03:22 raspberrypi dbus[1799]: [system] Successfully activated service 'org.freedesktop.ConsoleKit'

Feb 10 19:04:11 raspberrypi weewx[1912]: fousb: ptr changed: old=0x000230 new=0x000240

Feb 10 19:05:44 raspberrypi weewx[1912]: Archive: added archive record 2013-02-10 19:05:00 CET (1360519500)

Feb 10 19:05:44 raspberrypi weewx[1912]: reportengine: Running reports for latest time in the database.

Feb 10 19:05:44 raspberrypi weewx[1912]: reportengine: Running report StandardReport

Feb 10 19:05:44 raspberrypi weewx[1912]: reportengine: Found configuration file /home/pi/skins/Standard/skin.conf for report StandardReport

Feb 10 19:05:47 raspberrypi weewx[1912]: filegenerator: generated 1 'SummaryByMonth' files in 1.18 seconds

Feb 10 19:05:50 raspberrypi weewx[1912]: filegenerator: generated 1 'SummaryByYear' files in 3.20 seconds

Feb 10 19:06:04 raspberrypi weewx[1912]: restful: Failed attempt #1 to upload to Wunderground

Feb 10 19:06:04 raspberrypi weewx[1912]:    ****  Reason: timed out

Feb 10 19:06:06 raspberrypi weewx[1912]: filegenerator: generated 12 'toDate' files in 16.46 seconds

Feb 10 19:06:11 raspberrypi weewx[1912]: genimages: Generated 11 images in 4.35 seconds

Feb 10 19:06:11 raspberrypi weewx[1912]: reportengine: copied 9 files to /home/pi/public_html

Feb 10 19:06:11 raspberrypi weewx[1912]: reportengine: Running report FTP

Feb 10 19:06:11 raspberrypi weewx[1912]: reportengine: Found configuration file /home/pi/skins/Ftp/skin.conf for report FTP

Feb 10 19:06:24 raspberrypi weewx[1912]: restful: Failed attempt #2 to upload to Wunderground

Feb 10 19:06:24 raspberrypi weewx[1912]:    ****  Reason: timed out

Feb 10 19:06:24 raspberrypi weewx[1912]: restful: Published record 2013-02-10 19:05:00 CET (1360519500) to Wunderground station IALICANT61

Feb 10 19:06:48 raspberrypi weewx[1912]: ftpupload: attempt #1. Failed uploading /weather/dayrx.png. Reason: timed out

Feb 10 19:06:58 raspberrypi weewx[1912]: ftpupload: Uploaded file /weather/dayrx.png

Feb 10 19:07:18 raspberrypi weewx[1912]: ftpupload: attempt #1. Failed uploading /weather/daywinddir.png. Reason: timed out

Feb 10 19:07:27 raspberrypi weewx[1912]: ftpupload: Uploaded file /weather/daywinddir.png

No errors from what I can see in the syslog. The failed ftp uploads were down to a Internet connectivity problem but that cleared itself shortly after and the data is now on the site.

[Thomas Keffer]

Did you edit the very beginning of the start up? I wanted to see the start up of StdConvert and StdQC.

Also, absolutely nothing was printed on the console?

Do you have to do something unusual to see the console output on the RPi?

Sorry for the brevity, but I'm in a mobile phone.

-tk

--

[mwall]

reese,

we are looking for output something like this:

LOOP:   2013-02-10 13:25:56 EST (1360520756) {'heatindex': 41.0, 'barometer': 30.34689503088077, 'windchill': 41.0, 'dewpoint': 5.1062684863717323, 'pressure': 30.307147076196102, 'outHumidity': 22.0, 'rainRate': 0.0, 'UV': None, 'radiation': None, 'rain': 0.0, 'dateTime': 1360520756, 'windDir': 337.5, 'outTemp': 41.0, 'windSpeed': 4.4738725824000003, 'inHumidity': 29.0, 'inTemp': 73.580000000000013, 'windGust': 7.6055833900800014, 'altimeter': 30.336553349705746, 'usUnits': 1, 'windGustDir': 337.5}
LOOP:   2013-02-10 13:26:00 EST (1360520760) {'heatindex': 41.0, 'barometer': 30.34689503088077, 'windchill': 41.0, 'dewpoint': 5.1062684863717323, 'pressure': 30.307147076196102, 'outHumidity': 22.0, 'rainRate': 0.0, 'UV': None, 'radiation': None, 'rain': 0.0, 'dateTime': 1360520760, 'windDir': 337.5, 'outTemp': 41.0, 'windSpeed': 4.4738725824000003, 'inHumidity': 29.0, 'inTemp': 73.580000000000013, 'windGust': 7.6055833900800014, 'altimeter': 30.336553349705746, 'usUnits': 1, 'windGustDir': 337.5}

you should see this on the console when debug=1 and you start weewx like this:

cd /home/weewx
./bin/weewx weewx.conf

[Reese Lind]

Ok, I think I have what you are after.

LOOP:   2013-02-10 19:38:22 CET (1360521502) {'UV': None, 'barometer': None, 'windchill': 10.0, 'dewpoint': -4.0192267753679, 'outHumidity': 37.0, 'heatindex': 10.0, 'radiation': None, 'rain': None, 'dateTime': 1360521502, 'windDir': 225.0, 'outTemp': 10.0, 'windSpeed': 5.040000000000001, 'inHumidity': 71.0, 'inTemp': 10.200000000000001, 'windGust': 7.2, 'usUnits': 16, 'windGustDir': 225.0}

Both rain and baraometer report ´none´. There is no UV sensor so the ´none´ there is expected.

[mwall]

reese,

were you running weewx on the NSLU2 or was that with some other software?

have you made any modifications to the weewx 2.1.1 code?  specifically have you made changes to fousb.py?

m

[Reese Lind]

The NSLU2 was running Meteohub as the weather logging software. No changes to fousb.py.

[Thomas Keffer]

Yup, that's the output we were looking for! And, it appears that the barometer value is truly 'None.' 

So, the two missing pieces of the puzzle are:

1. We still need to see the log from when weewx started up. I want to make sure StdConvert and StdQC are starting correctly. And,
2. Please send your configuration file, weewx.conf, directly to me at tkeffer at gmail dot com. Obfuscate any passwords in it.

If these two things check out, then we know we have a problem with the driver for the WH1080.

-tk

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[Reese Lind]

Applied the new USB driver and problem appear to be solved.

Running the driver gave the following output.

Querying the station...

Fine Offset station settings:

                    local time: 2013.02.11 18:34:28 CET

                  abs_pressure: 933.3

                   current_pos: 592

                  data_changed: 0

                    data_count: 22

                     date_time: 2007-01-01 22:49

                 hum_in_offset: 18722

                hum_out_offset: 257

                            id: None

                 lux_wm2_coeff: 0

                       magic_1: 0x55

                       magic_2: 0xaa

                         model: None

                     rain_coef: None

                   read_period: 30

                  rel_pressure: 1014.8

                temp_in_offset: 1792

               temp_out_offset: 0

                      timezone: 0

                    unknown_01: 0

                    unknown_18: 0

                       version: 255

                     wind_coef: None

                     wind_mult: 0

         max.abs_pressure.date: 2007-01-01 12:00

          max.abs_pressure.val: 1010.6

             max.dewpoint.date: 2010-08-20 09:09

              max.dewpoint.val: 23.9

               max.hum_in.date: 2013-01-21 05:50

                max.hum_in.val: 84

              max.hum_out.date: 2010-02-17 04:38

               max.hum_out.val: 99

           max.illuminance.val: 0

             max.rain.day.date: 2009-12-01 04:47

              max.rain.day.val: 3992.4

            max.rain.hour.date: 2009-11-30 06:00

             max.rain.hour.val: 1717.2

           max.rain.month.date: 2009-12-31 05:59

            max.rain.month.val: 6572.7

           max.rain.total.date: 2010-05-13 18:58

            max.rain.total.val: 10609.2

            max.rain.week.date: 2009-12-04 17:04

             max.rain.week.val: 5783.4

         max.rel_pressure.date: 2011-02-25 10:14

          max.rel_pressure.val: 1038.4

              max.temp_in.date: 2011-07-10 15:57

               max.temp_in.val: 35.5

             max.temp_out.date: 2012-08-10 15:44

              max.temp_out.val: 43.9

                    max.uv.val: 0

             max.wind_ave.date: 2010-10-12 16:19

              max.wind_ave.val: 83.3

            max.wind_gust.date: 2010-10-12 16:19

             max.wind_gust.val: 32.3

            max.windchill.date: 2012-08-10 15:44

             max.windchill.val: 43.9

         min.abs_pressure.date: 2013-01-19 14:15

          min.abs_pressure.val: 909.5

             min.dewpoint.date: 2007-01-01 22:46

              min.dewpoint.val: -3.7

               min.hum_in.date: 2012-08-12 08:29

                min.hum_in.val: 17

              min.hum_out.date: 2010-07-09 11:07

               min.hum_out.val: 10

         min.rel_pressure.date: 2013-01-19 14:15

          min.rel_pressure.val: 972.1

              min.temp_in.date: 2012-02-04 07:27

               min.temp_in.val: 1.9

             min.temp_out.date: 2011-01-22 07:56

              min.temp_out.val: -7.2

            min.windchill.date: 2012-02-04 03:12

             min.windchill.val: -17.5

      settings_1.pressure_inHg: False

       settings_1.pressure_hPa: True

         settings_1.temp_out_F: False

      settings_1.pressure_mmHg: False

            settings_1.rain_in: False

          settings_1.temp_in_F: False

               settings_1.bit4: False

               settings_1.bit3: False

           settings_2.wind_bft: False

           settings_2.wind_mps: False

          settings_2.wind_knot: False

               settings_2.bit7: False

               settings_2.bit6: False

               settings_2.bit5: False

          settings_2.wind_kmph: True

           settings_2.wind_mph: False

           display_1.wind_gust: False

       display_1.show_day_name: False

           display_1.show_year: True

       display_1.time_scale_24: False

        display_1.pressure_rel: True

          display_1.alarm_time: False

            display_1.date_mdy: False

          display_1.clock_12hr: False

       display_2.temp_out_temp: True

           display_2.rain_hour: False

          display_2.rain_month: False

           display_2.rain_week: False

      display_2.temp_out_chill: False

            display_2.rain_day: True

        display_2.temp_out_dew: False

          display_2.rain_total: False

      display_3.illuminance_fc: False

                display_3.bit7: False

                display_3.bit6: False

                display_3.bit5: False

                display_3.bit4: False

                display_3.bit3: False

                display_3.bit2: False

                display_3.bit1: False

         alarm.abs_pressure.hi: 1040.2

         alarm.abs_pressure.lo: 960.0

             alarm.dewpoint.hi: 10.0

             alarm.dewpoint.lo: -10.0

               alarm.hum_in.hi: 65

               alarm.hum_in.lo: 35

              alarm.hum_out.hi: 66

              alarm.hum_out.lo: 45

             alarm.illuminance: 0

                alarm.rain.day: 150.0

               alarm.rain.hour: 3.0

         alarm.rel_pressure.hi: 1040.0

         alarm.rel_pressure.lo: 960.0

              alarm.temp_in.hi: 20.0

              alarm.temp_in.lo: 0

             alarm.temp_out.hi: 30.0

             alarm.temp_out.lo: -10.0

                    alarm.time: 13:00

                      alarm.uv: 0

            alarm.wind_ave.bft: 3

             alarm.wind_ave.ms: 19.5

                alarm.wind_dir: 0

           alarm.wind_gust.bft: 5

            alarm.wind_gust.ms: 12.9

            alarm.windchill.hi: 20.0

            alarm.windchill.lo: 0

            alarm_1.hum_out_hi: False

             alarm_1.hum_in_lo: False

             alarm_1.hum_in_hi: False

            alarm_1.hum_out_lo: False

                  alarm_1.time: False

                  alarm_1.bit3: False

              alarm_1.wind_dir: False

                  alarm_1.bit0: False

              alarm_2.wind_ave: False

             alarm_2.wind_gust: False

             alarm_2.rain_hour: False

       alarm_2.pressure_rel_lo: False

       alarm_2.pressure_abs_hi: False

              alarm_2.rain_day: False

       alarm_2.pressure_rel_hi: False

       alarm_2.pressure_abs_lo: False

           alarm_3.temp_out_hi: False

         alarm_3.wind_chill_lo: False

          alarm_3.dew_point_lo: False

            alarm_3.temp_in_lo: False

         alarm_3.wind_chill_hi: False

            alarm_3.temp_in_hi: False

           alarm_3.temp_out_lo: False

          alarm_3.dew_point_hi: False

Section  of syslog following restart

Feb 11 18:37:28 raspberrypi weewx[1981]: wxengine: Using configuration file /home/pi/weewx.conf.

Feb 11 18:37:28 raspberrypi weewx[1981]: fousb: using PERIODIC polling mode

Feb 11 18:37:28 raspberrypi weewx[1981]: wxengine: Loading service weewx.wxengine.StdConvert

Feb 11 18:37:28 raspberrypi weewx[1981]: wxengine: StdConvert target unit is 0x10

Feb 11 18:37:28 raspberrypi weewx[1981]: wxengine: Finished loading service weewx.wxengine.StdConvert

Feb 11 18:37:28 raspberrypi weewx[1981]: wxengine: Loading service weewx.wxengine.StdCalibrate

Feb 11 18:37:28 raspberrypi weewx[1981]: wxengine: Finished loading service weewx.wxengine.StdCalibrate

Feb 11 18:37:28 raspberrypi weewx[1981]: wxengine: Loading service weewx.wxengine.StdQC

Feb 11 18:37:28 raspberrypi weewx[1981]: wxengine: Finished loading service weewx.wxengine.StdQC

Feb 11 18:37:28 raspberrypi weewx[1981]: wxengine: Loading service weewx.wxengine.StdArchive

Feb 11 18:37:28 raspberrypi weewx[1981]: wxengine: Using archive interval of 300 from config file

Feb 11 18:37:28 raspberrypi weewx[1981]: wxengine: Record generation will be attempted in 'hardware'

Feb 11 18:37:28 raspberrypi weewx[1981]: wxengine: Using archive database: archive_sqlite

Feb 11 18:37:28 raspberrypi weewx[1981]: stats: Backfilling stats database.

Feb 11 18:37:28 raspberrypi weewx[1981]: stats: stats database up to date.

Feb 11 18:37:28 raspberrypi weewx[1981]: wxengine: Using stats database: stats_sqlite

Feb 11 18:37:28 raspberrypi weewx[1981]: wxengine: Finished loading service weewx.wxengine.StdArchive

Feb 11 18:37:28 raspberrypi weewx[1981]: wxengine: Loading service weewx.wxengine.StdTimeSynch

Feb 11 18:37:28 raspberrypi weewx[1981]: wxengine: Finished loading service weewx.wxengine.StdTimeSynch

Feb 11 18:37:28 raspberrypi weewx[1981]: wxengine: Loading service weewx.wxengine.StdPrint

Feb 11 18:37:28 raspberrypi weewx[1981]: wxengine: Finished loading service weewx.wxengine.StdPrint

Feb 11 18:37:28 raspberrypi weewx[1981]: wxengine: Loading service weewx.wxengine.StdRESTful

Feb 11 18:37:28 raspberrypi weewx[1981]: wxengine: Data will be posted to Wunderground

Feb 11 18:37:28 raspberrypi weewx[1981]: wxengine: Data will not be posted to PWSweather

Feb 11 18:37:28 raspberrypi weewx[1981]:     ****  'station'

Feb 11 18:37:28 raspberrypi weewx[1981]: wxengine: Data will not be posted to CWOP

Feb 11 18:37:28 raspberrypi weewx[1981]:     ****  'station'

Feb 11 18:37:28 raspberrypi weewx[1981]: wxengine: Started thread for RESTful upload sites.

Feb 11 18:37:28 raspberrypi weewx[1981]: wxengine: Finished loading service weewx.wxengine.StdRESTful

Feb 11 18:37:28 raspberrypi weewx[1981]: wxengine: Loading service weewx.wxengine.StdReport

Feb 11 18:37:28 raspberrypi weewx[1981]: wxengine: Finished loading service weewx.wxengine.StdReport

Feb 11 18:37:28 raspberrypi weewx[1981]: wxengine: Starting up weewx version 2.1.1.

Feb 11 18:37:28 raspberrypi weewx[1981]: wxengine: Starting main packet loop.

Feb 11 18:37:28 raspberrypi weewx[1981]: wxengine: Station does not support reading the time

Feb 11 18:38:16 raspberrypi dbus[1815]: [system] Activating service name='org.freedesktop.ConsoleKit' ($

Feb 11 18:38:16 raspberrypi dbus[1815]: [system] Activating service name='org.freedesktop.PolicyKit1' ($

Feb 11 18:38:17 raspberrypi polkitd[2072]: started daemon version 0.105 using authority implementation $

Feb 11 18:38:17 raspberrypi dbus[1815]: [system] Successfully activated service 'org.freedesktop.Policy$

Feb 11 18:38:17 raspberrypi dbus[1815]: [system] Successfully activated service 'org.freedesktop.Consol$

Finally, the LOOP output from the new setup.

LOOP:   2013-02-11 18:45:15 CET (1360604715) {'UV': None, 'barometer': 1003.4071824896382, 'windchill': 4.093019425379217, 'dewpoint': -4.083420198875541, 'outTemp': 6.1000000000000005, 'outHumidity': 48.0, 'altimeter': 1001.4860273307922, 'heatindex': 6.100000000000002, 'radiation': None, 'rain': None, 'dateTime': 1360604715, 'windDir': 270.0, 'pressure': 933.4000000000001, 'windSpeed': 34.2, 'inHumidity': 73.0, 'inTemp': 6.300000000000001, 'windGust': 46.440000000000005, 'rainRate': 0, 'usUnits': 16, 'windGustDir': 270.0}

Barometric data is correctly logging to both Weather Underground and my website. Thanks guys for the really quick fix.

[Andrew Milner]

Reese - what new usb driver are you referring to - as I am also using a Pi for my 2080 station..  I also have had problems with pressure - finally got it sorted with a -to me- crazy calibration setting, and I see your weather station is showing a rain rate - whereas mine seems to give n/a for rain rate.

How did you run the driver to get the output you put in your post?

[Reese Lind]

[Reese Lind]

Sorry for the delay reply Andrew, I missed your post last night.

The new USB driver came from Tom and Mathew here as a response to the problem and output I posted. Probably best to post details of your problem with the outpout of LOOP and syslog. Make sure you have the debug flag in weewx.conf set to 1 so you get any problems with weewx written to syslog.

Reese