Hi, I really like your undertaking and I do think I have competencies that can assist you. Your software is submitted. 1x GND 3V3 (P2 with two pins two.54mm) connector can be utilized to electric power externally the WCH CH569 MCU (it is recommended to get rid of the P4/SHUNT in that circumstance it is not necessary given that the 3V3 LDO IC1 is