Serial Console for the Rock64

[ClaudiaF]

Theoretically a 1K resistor in-line will work;  but don't do it.  

Always use a level shifter;  there are several good ones on the market ( very tiny ) from places like Sparkfun ;  or you can make your own with an  LM319 open collector comparator.   

words of warning:  never touch 5v to any gpio pin of the PineA64+ or the Rock64 , nor the Padi Stamp... or you'll get magic blue smoke and the board(s) will be toast.

Hello marcushh777,

thank you very much for your thoughts.
I'm a newbie when it comes to hardware and electronics and I'm thankful that you provided different solution to the issue.
I guess I go with the level shifter, as far as I remember a friend of mine mentioned something like this - so maybe I can borow it.

Cheers
Claudia