Good morning and good luck!

1) this morning I woke up at 7.00 (simple past, action is over maybe it’s in the afternoon now!) 2) this morning I’ve woken up at 7.00 (present perfect, it’s still in the same morning). If what I wrote is right I can’t understand which is the time limit (maybe 12 o’clock) to make the difference when the time is OVER or when it isn’t as we are always talking about the same day in both cases :((((((( thank you. Federica

Just as English mother-tongue speakers really struggle with the subjunctive (congiuntivo) in Italian (because it hardly exists in English), so Italians have great difficulty with these two past tenses in English (because there isn’t an equivalent usage in Italian). There are many Italians who speak excellent English who frequently get this wrong.
In the case, however, you could ONLY use the simple past. Why? Because you have specified a time that is now past: not this morning, but 7 o’ clock!!! Ahah!!!
You can, however, use the present perfect with the verb to wake up. For example: “Has that lazy, good-for-nothing husband of yours woken up yet?”
“No, he hasn’t (woken up yet)!” Or:
“Yes, he has (woken up)! He woke up at 7 o’clock, as a matter of fact!”
Good morning and good luck!