Hi, I really like your task and I do think I have competencies that may help you. Your application has actually been submitted.1x GND 3V3 (P2 with 2 pins two.54mm) connector can be utilized to ability externally the WCH CH569 MCU (it is recommended to get rid of the P4/SHUNT in that circumstance It isn't obligatory as the 3V3 LDO IC1 is guarded tow