Observation Types

[Craig Young]

Where can I find the list of observation types?  I am writing a new driver for my hardware and need to map the physical data to the corresponding observation types to create the loop packet.

Craig

[matthew wall]

On Wednesday, September 13, 2023 at 6:51:17 AM UTC-4 craig.y...@gmail.com wrote:

Where can I find the list of observation types? 

within the driver code, use names that match whatever the hardware uses. then you can map those onto the weewx observation types when you generate a LOOP or ARCHIVE dict.  for example, the hardware documentation might use 'inside_temperature', but the weewx equivalent is 'inTemp'.

the weewx observation types are defined by the database schema. 'wview_extended' is the default schema, but weewx also ships with the legacy 'wview' and 'wview_small' schemas.

https://github.com/weewx/weewx/blob/master/bin/schemas/wview_extended.py

you can see what other drivers have done by browsing the 'Station data' section for each driver in the hardware guide:

http://weewx.com/docs/hardware.htm

for power/solar/battery monitoring, or hardware that emits observations that are not easily mapped to the weather-based schemas, it is typical to ship a bespoke schema with the driver.

 

[Craig Young]

Thanks Matthew, I understand now.  I also did some reading of the 'customization' section in the wiki and it ties together nicely with what you have posted.  So my next step is to setup the database, load all of my archive data and then update the driver to match the schema.

Craig

[Karen K]

I would suggest to look into obs_group_dict in /usr/share/weewx/weewx/units.py for a list of pre-defined observation types and their unit groups.

[Craig Young]

Thanks Karen, that is an incredibly useful document.

Craig