That's what I was assuming as well - which made me think maybe this wasn't 
supported. 

I'm digging in further and using a lot of prints to follow the flow. At 
some point it seems the key is stripped off and I haven't figured out why 
yet. But this is helpful knowing that it's at least possible. 



On Tuesday, April 16, 2019 at 7:23:59 PM UTC-4, gjr80 wrote:
>
> If it's not appearing in LOOP then it will not appear in REC, so I guess 
> you need to have a look again at your driver and make sure it is actually 
> emitting it (remember what you see on the console is from StdPrint after 
> all the processing of the packets/records occur so it may be different to 
> what is actually coming out of the driver - unusual for things to disappear 
> though).
>
> Gary
>
> On Wednesday, 17 April 2019 09:19:36 UTC+10, Pat wrote:
>>
>> Hi Gary, 
>>
>> Understood on the debate. Since I'm able to include it into my station 
>> data source, it makes sense and is quick work to include it in the driver. 
>>
>> When I run weewxd /etc/weewx/weewx.conf, there is no lightning_distance in 
>> the LOOP and no lightning_distance in the REC. So I must be missing 
>> something? 
>>
>> On Tuesday, April 16, 2019 at 7:12:38 PM UTC-4, gjr80 wrote:
>>>
>>> Hi Pat,
>>>
>>> So your driver is picking up the distance data, adding it to a field 
>>> called lightning_distance and emitting it in a loop packet. If it's 
>>> numeric (is it?) WeeWX should certainly be accumulating it and including it 
>>> in archive records, there is nothing more to do other than selecting the 
>>> correct extractor function, though the default is average so that should be 
>>> fine. As for the driver, the driver is just a driver, it doesn't care where 
>>> the data comes from or how it got there, if it's there and available its 
>>> just data. There maybe a debate to be had about whether you are making a 
>>> driver too complex by adding data from multiple sources but that is not the 
>>> issue here by the sounds of it.
>>>
>>> So you are running WeeWX directly and see lightning_distance in LOOP: 
>>> but not in REC: or does it appear as None ? 
>>>
>>> Gary
>>>
>>> On Wednesday, 17 April 2019 08:24:17 UTC+10, Pat wrote:
>>>>
>>>> I'm working on adding an AS3935 lightning sensor to my Davis VP2 
>>>> station setup as an external sensor. My weewx driver is a customized 
>>>> socket 
>>>> server driver, so I'm able to inject this lightning data to the socket so 
>>>> the driver picks it up right away with the LOOP. 
>>>>
>>>> I've read matthew's service for this sensor 
>>>> <https://github.com/weewx/weewx/wiki/as3935>, but I don't think that 
>>>> it applies to my setup since I'm not hooking the AS3935 to a Raspberry Pi 
>>>> GPIO. 
>>>>
>>>> I've extended my schema to have "lightning_distance" in the archive 
>>>> table. 
>>>>
>>>> I was hoping that yielding a key of "lightning_distance" to the LOOP 
>>>> packet (e.g. packet["lightning_distance"]), that it would be stored in 
>>>> the loop and sent to the archive on REC. This seems to not be the case - 
>>>> which I kind-of expected. 
>>>>
>>>> A custom service could be challenging since this data would be 
>>>> delivered directly to the driver. 
>>>>
>>>> So my question; is it possible to have my driver yield custom variables 
>>>> to the LOOP so it can be processed - or do I have to do a custom service? 
>>>> Or can the driver send the data to a custom service?
>>>>
>>>> Looking for some thoughts and insight on best practice. 
>>>>
>>>> Thanks!
>>>>
>>>>

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