Thanks Andrew and Thomas for your replies and your help, now I think I am near of my solution. Okey, let me tell you the news.
First I have checked the current info about the station with wee_device --current, and the relative pressure doesnt appear, only the absolute, in this point I figured I would have to calculate it. Second I did that you say, Thomas, and added *rel_pressure = pressure + 1.801* and edit the template, but then, WeeWX show 20.02345324 (I dont remember the decimals exactly), a lot of decimals and not the unit (hPa). Then, I added *rel_pressure = pressure + 984.59* (the difference) and now, it show the pressure I want but with a lot of decimals and without the unit, and I dont know yet if this data will be good in the future or next days. I adjunt a screenshot about the status of barometer now, and the output of wee_device --current. And yeah, I know that Absolute Pressure is more "reliable", but I want to see the relative pressure because in my country, all is expresed in relative pressure, Meteo Channels, basic meteo stations, etc and I am accustomed to see it. Here is an example of WeeWX working near of my country ( http://www.colladojermoso.com/colladojermoso.com/meteo/meteo/index.html), it show the relative too. Sorry if my english is not so good, it isn't my native language. Miguel. -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/weewx-user/877ddc60-aff2-4d18-9266-c6a01ef9bb66%40googlegroups.com.
