Thanks, Tom.
I don’t think that’s the problem as I add an interval to the (copy of) the
packet. That is needed because I keep my own set of accumulators so that
loopdata can write out observations on every loop packet (in its own thread)
and never have to access the database. I can add an interval because the user
specifies a LoopFrequency in seconds.
Indeed, on my VantagePro2 and RainWise weewx installs, I have no problem with
windrun in loopdata.
I’ve seen issues at startup when I’ve tried the WeatherLinkUDP driver and I
have code not checked in to catch and ignore errors to make it pass the
startup, but I worry that loopdata won’t be accurate for drivers where loop
packets don’t always contain all the data. It’s not something I am likely to
tackle anytime soon.
I’m guessing this driver is one of those cases, where loops don’t contain all
the observations. If so, it’s not a good candidate to use loopdata (at least,
not at this time).
To the original OP, does everything work fine without loopdata? Furthermore,
does loopdata break the operation of weewx? I’d be surprised if this is true
as the loopdata thread should just die.
> On Feb 21, 2022, at 4:09 PM, Tom Keffer <tkef...@gmail.com> wrote:
>
>
> loopdata is trying to calculate windrun, which requires a value for
> 'interval'. You need it to multiply against velocity to get distance.
> Unfortunately, 'interval' is not available in loop packets because they come
> at irregular intervals.
>
> The source for loopdata could be modified to only calculate windrun if
> possible. For example, this patch should work (NOT TESTED):
>
> Index: bin/user/loopdata.py
> ===================================================================
> diff --git a/bin/user/loopdata.py b/bin/user/loopdata.py
> --- a/bin/user/loopdata.py (revision 0ee9d2ba94c53888154363aa412f1d5d5002ff12)
> +++ b/bin/user/loopdata.py (date 1645488401429)
> @@ -807,11 +807,14 @@
> pkt_time: int = to_int(pkt['dateTime'])
> pkt['interval'] = self.cfg.loop_frequency / 60.0
>
> - windrun_val =
> weewx.wxxtypes.WXXTypes.calc_windrun('windrun', pkt)
> - pkt['windrun'] = windrun_val[0]
> - if windrun_val[0] > 0.00 and 'windDir' in pkt and
> pkt['windDir'] is not None:
> - bkt = LoopProcessor.get_windrun_bucket(pkt['windDir'])
> - pkt['windrun_%s' % windrun_bucket_suffixes[bkt]] =
> windrun_val[0]
> + try:
> + windrun_val =
> weewx.wxxtypes.WXXTypes.calc_windrun('windrun', pkt)
> + pkt['windrun'] = windrun_val[0]
> + if windrun_val[0] > 0.00 and 'windDir' in pkt and
> pkt['windDir'] is not None:
> + bkt =
> LoopProcessor.get_windrun_bucket(pkt['windDir'])
> + pkt['windrun_%s' % windrun_bucket_suffixes[bkt]] =
> windrun_val[0]
> + except weewx.CannotCalculate:
> + pass
>
> beaufort_val =
> weewx.wxxtypes.WXXTypes.calc_beaufort('beaufort', pkt)
> pkt['beaufort'] = beaufort_val[0]
>
>
>> On Sun, Feb 20, 2022 at 7:57 AM Andrew Roberts <and...@thinkingbone.org>
>> wrote:
>> Hi,
>> I'm after a steer as to where to look to fix/block this issue. I'm running
>> RTLDavis with a Vantage Vue and weewx 4.6.1. The indoor temperature and
>> pressure (BMP280) is coming through as a data service over a serial link.
>>
>> When I start up weewx and use loopdata, syslog shows:
>>
>> Feb 20 12:01:23 Weather-Centre weewx[12537] CRITICAL user.loopdata: ****
>> Traceback (most recent call last):
>> Feb 20 12:01:23 Weather-Centre weewx[12537] CRITICAL user.loopdata: ****
>> File "/usr/share/weewx/user/loopdata.py", line 810, in process_queue
>> Feb 20 12:01:23 Weather-Centre weewx[12537] CRITICAL user.loopdata: ****
>> windrun_val = weewx.wxxtypes.WXXTypes.calc_windrun('windrun', pkt)
>> Feb 20 12:01:23 Weather-Centre weewx[12537] CRITICAL user.loopdata: ****
>> File "/usr/share/weewx/weewx/wxxtypes.py", line 303, in calc_windrun
>> Feb 20 12:01:23 Weather-Centre weewx[12537] CRITICAL user.loopdata: ****
>> raise weewx.CannotCalculate(key)
>> Feb 20 12:01:23 Weather-Centre weewx[12537] CRITICAL user.loopdata: ****
>> weewx.CannotCalculate: windrun
>>
>> 1. Looking into the code it seems to be a lack of interval data. I can not
>> find a way of sorting this in weewx.conf and close inspection of the
>> RTLDavis DEBUG data in Syslog (attached) doesn't have any interval data in
>> it.
>>
>> 2. In spite of it raining, the console reporting rain and after tipping a
>> cup of water into the bucket I'm not reliably getting rain data from the
>> ISS. the DEBUG (all three debug options set to 3) log records:
>>
>> DEBUG user.rtldavis: data_pkt: {'channel': 1, 'bat_iss': 0,
>> 'wind_speed_ec': 15, 'wind_speed_raw': 14, 'wind_dir': 273.9486166007905,
>> 'wind_speed': 6.705583333333333, 'rain_count': 37, 'curr_cnt0': 2982,
>> 'curr_cnt1': 0, 'curr_cnt2': 0, 'curr_cnt3': 0}
>> DEBUG user.rtldavis: rain=0.0 rain_count=0 last_rain_count=37
>> DEBUG user.rtldavis: pkt= {'windSpeed': 6.705583333333333, 'windDir':
>> 273.9486166007905, 'txBatteryStatus': 0, 'rain': 0.0, 'dateTime':
>> 1645353107, 'usUnits': 17}
>>
>> Any suggestions as to next steps for me troubleshooting these would be
>> welcome.
>>
>> Andrew
>>
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