First time user: Post your problems here

Already answered, I think, your original question and moved to a separate topic.
Here => History and graphs data

What info are you asking about.
WU can be used for graphs => best solution
History.txt is needed to show high-lows for some weather-program uploads or weahter-nets.

You should use cron to update the history.

Yes you can generate a “start-history” using WU-data. => pwsWD/PWS_hist_recreate.php?pw=12345
Yes you can update the history file if you have an error-value in it => PWS_hist_update.php?pw=12345

is there anything else missing?