I use FTDI USB cables that have 5V power and 3.3v UART levels so it should be okay from this side.

I finally ordered new and different (looking) HC05 modules.

Name: HC05_new.jpg Views: 3687 Size: 31.5 KB

These ones have two almost equally sized black chips unlike the ones I have on my desk so they might be a little différent.

So wait and see...