Thanks. I have tried also RX to TX but that wont work either.
Still cannot upload code to pro mini.
Connected Pro Mini to my Uno
5v - VCC
GND - GND
TX - TX
RX - RX
UNO Reset to UNO GRN
Selected board Pro Mini Atmega328 5V
In Uno board rx blinks couple of times really fast but nothing else will not happen.
Tried also config
Battery 7.6v - VCC
Battery GND - GND
Uno's TX - to pro mini TX
Uno's RX - to pro mini RX
Both tries released reset button when IDE says that it will start uploading.
Ari