I've always loved STDC14 connectors on my STM32/Nrf52 boards. Additional to actual programming pins they have all the necessary functions, like UART and level-shifting support. Unfortunately, only the official ST programmers use this type of connector.

Lately, I've been experimenting with CH32 chips. After digging around a bit, I found DAPLink firmware for the CH32V305 and some example schematics for CH32V305 programmers. So, I figured, why not make my own DAPLink probe—but with an STDC14 connector!