Awesome! This is sort of what I suspected that most use cases, NULL is a 
problem. I can just hard code the entire Davis loop which will work for my 
needs.

Thanks you,

Geoff

On Wednesday, November 25, 2020 at 6:45:44 AM UTC-8 jo...@johnkline.com 
wrote:

> In the general case, including keys in the loop packet for non-existent 
> data is not a good idea.  This would break existing code (e.g., JavaScript 
> code I use in my skins).
>
> You could easily fork the extension and add in what you need.  At line 
> 736, right before write_packet_to_file is called, simply check for the keys 
> you need to exist, and add them if they are not there. The following should 
> work.  Just replace the keys I’ve listed with the ones you need in the 
> packet.
>
> must_have_keys = [ 'current.outTemp', 'current.outHumidity' ]
>     for must_have_key in must_have_keys:
>         if must_have_key not in loopdata_pkt:
>             loopdata_pkt[must_have_key] = None
>
> If you don’t want to hard code the keys, you’ll have a bigger task; but 
> you could just copy the code used to process the ‘fields’ entry in the 
> LoopData section of weewx.conf.
>
> Cheers,
> John
>
> On Nov 24, 2020, at 8:54 PM, geoffs...@gmail.com <geoffs...@gmail.com> 
> wrote:
>
> Hi John,
>
>
> This is a great extension. I'm wondering if there is a way to be able to 
> include sending data that is null  or none for a particular key? I'm using 
> a davis vantage pro2, weewx 4.2. I'd like to use this to make a JSON output 
> that can be ingested into a home automation system. So far it works great 
> as long as the data is available to be sent, but I have not figured out how 
> to send a key with a Null or none value. It looks like a key with a null or 
> none value gets cleaved off the JSON output. If a battery dies on a sensor 
> and it just disappears from the JSON output, that is much harder for the HA 
> system to handle than a null, none or zero value. 
>
> On Monday, November 16, 2020 at 2:57:13 PM UTC-8 jo...@johnkline.com 
> wrote:
>
>> A fix is released (v2.7.2).  There is no hurry to install the new 
>> release; but once you’ve installed it, you can remove the field I asked you 
>> to add to weewx.conf.
>>
>> On Nov 16, 2020, at 9:04 AM, Geni <eugen.a...@gmail.com> wrote:
>>
>> Ok, works
>>
>>
>> Thank you
>>
>> jo...@johnkline.com schrieb am Montag, 16. November 2020 um 16:05:21 
>> UTC+1:
>>
>>> I can duplicate this problem and will issue a fix.
>>>
>>> In the meantime, you can add:
>>> rainyear.outTemp.max
>>> to the fields clause in the LoopData section of weewx.conf?
>>>
>>> That will stop this problem.  If you get similar errors for other 
>>> periods where you have no fields listed, you’ll have to temporarily add a 
>>> field for those periods also.
>>>
>>> I should have a fix shortly.  I don’t know that this is related to WeeWX 
>>> 4.2, not that that really matters. 
>>>
>>> On Nov 16, 2020, at 2:45 AM, Geni <eugen.a...@gmail.com> wrote:
>>>
>>> 
>>>
>>>
>>> Hi john
>>> since weewx 4.2.0 the loop-data.txt is no longer generated?
>>> regards Geni
>>>
>>>
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