I was wondering how you do UPD and Serial togther but the link all the way on the end of this page (last line) is dead:
https://github.com/SpenceKonde/AVR-Guidance/blob/master/UPDI/jtag2updi.md
The photo was just a picture of a tinyavr with an srerial adapter pligged in in the normal way, and a second serial adapter pobti a dufferebt jheader, it contains nothing inbtetesting.
I was wondering how you do UPD and Serial togther but the link all the way on the end of this page (last line) is dead:
https://github.com/SpenceKonde/AVR-Guidance/blob/master/UPDI/jtag2updi.md