Howdy, I actually like your task and I do think I've skills that may help you. Your application has actually been submitted. 1x GND 3V3 (P2 with 2 pins two.54mm) connector can be employed to electrical power externally the WCH CH569 MCU (it is recommended to remove the P4/SHUNT in that situation it is not necessary as being the 3V3 LDO IC1 is pr