a simple google search shows that many people have decoded the 433MHZ signal from this weather station. would be a simple matter to build a received with some code to decode the signal. once you do that adding the data to weewx is trivial.
https://github.com/giulio93/Backeng_433mhz_Arduino -- 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 weewx-user+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/weewx-user/ba43b924-3b54-4d21-9ad0-c679df8d1a02n%40googlegroups.com.