@dbemowsk , yes I am using the 3.3 nano.
I´m using 2 regular AA batteries 1,5 V. I am measuring on VCC for radio, which should be boosted to 3.3V.
VCC on the left pin layout is 3.3, the 3.3-pin is same as battery.

Booster output is 3.3V.
I was unaware of the need for voltage regulator to the radio - since I´m going with 3.3 all the way I never realized this. That´s probably the culprit right there.

I´ll try your suggestion tomorrow and see if it works out. Thank you for your time.

@sundberg84 , det är OK, det är inte mitt förstaspråk heller.. ;)
Tack för ett bra nybörjarpaket - väldigt enkelt att få ihop en bra hobbysensor!
Jag misstänker att det är som dbemowsk säger - att jag skulle haft en booster till radion också.

Hi guys!

Any suggestions as to why my voltage on 3.3 is either battery voltage (if BAT is short circuited) or 0v if BAT not short circuited. I have the same problem on two boards so I guess I´ve done the same mistake twice and that it´s not H/W error.. This means the radio doesn´t work unless I have brand new batteries or hook it up to USB for programming..