I found several tutorials that did that.
I realized that after I had the PCBs made and shipped, so I just soldered a 10uF cap on top of it, leaving the 100nF also.
I forgot to add the caps on the input and output of the regulator. I’ll add them now.
“And there is the - not commented on - fact, that you have potentiometers on digital only pins.”
Yeah. That was stupid. I’m just not using them right now.
That schematic is the schematic to my transmitter, so that means it should be ok.