I would use weather service sources for barometric pressure if it was not available on-site. Barometric pressure is going to be largely consistent across a wide geographic area.toggle quoted messageShow quoted text
You can use the ASCOM ObservingConditions Hub (OCH) driver to mix in multiple sources of the various weather properties that ASCOM ObservingConditions covers. So you can use temperature, humidity, and dewpoint from the Pegasus PPA, and air pressure and other data from OpenWeatherMap, a driver for which is included with ASCOM.
To use OpenWeatherMap, you can go to openweathermap.org, create an account, and then create an API Key for that account, which is a string of text characters, which you would then program into the OpenWeatherMap ASCOM driver's configuration screen along with the coordinates or postal code you want data for. The OCH will then mix these sources together and present them to the app (APPM/APCC) for use.
Here are two screenshots from my setup that uses ASCOM OCH to mix in 3 different sources of info:
ASCOM OCH configuration screen with the following sources:
* Pegasus Ultimate Power Box v2 (temperature, humidity, dewpoint)
* Unihedron SQM device (SQM measurements)
* OpenWeatherMap (cloud cover %, air pressure, wind speed/direction/gust speed)
And how it shows up in my AP app, NINA in my case:
(SQM measurement is missing because I don't have that connected at this time)
On Oct 2, 2020, at 2:01 AM, Marcelo Figueroa via groups.io <email@example.com> wrote: