Hi, I'm starting my journey with PCB design and i've made a simple PCB with attiny1614 and tried programming it with USB/UART converter. And after first try to program it I got an error, it says that "UPDI initialisation failed" the programmer sends a signal but attiny did not respond. As you can see on the schematics I connected the TX and RX of the programmer to UPDI pin through a 4.7komh resistor, but after failed programming attempt I found out that one of the pins should be connected after the resistor not before like other one ( I hope you understand what I mean) so I soldered it the way it should work, and it still doesn't. I have to mention I'm using a 3.3V battery to power up the board and I'm using the battery while programming, I'm not using the VCC pin on programmer, just the GND that is required. (I also tried using the VCC pin but it didn't work either) The error is still the same. And I also tried changing the attiny in case that one was defective. So my question is, what am I doing wrong? Did I missed something?