I just did a clean package install of weewx on a pi3 and then installed the extension with the two commands I posted above. Worked fine.
My guess in the absence of much info is that you don't have a good copy of the .tar.gz for the extension. Check your file size and checksum: pi@pi3jr-wifi:/var/tmp $ ls -al weewx-previmeteo-v0.1.tar.gz -rw-r--r-- 1 pi pi 1446 Jul 1 08:46 weewx-previmeteo-v0.1.tar.gz pi@pi3jr-wifi:/var/tmp $ sha1sum weewx-previmeteo-v0.1.tar.gz ca62d2821862de3dbad53707ca41761300b75487 weewx-previmeteo-v0.1.tar.gz Your size and sha1sum should match 'exactly'. If it doesn't, you have a truncated/corrupted download. -- 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/d32d8128-9a08-45ce-b55a-c54f354ae2f5n%40googlegroups.com.
