Hi, I really like your undertaking and I do think I have competencies to assist you. Your software has been submitted. 1x GND 3V3 (P2 with two pins 2.54mm) connector can be utilized to electric power externally the WCH CH569 MCU (it is recommended to get rid of the P4/SHUNT https://charliehjeaw.blogrelation.com/39351368/how-hydrabus-can-save-you-time-stress-and-money