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Howdy, I actually like your venture and I feel I have techniques to assist you. Your software continues to be submitted.1x GND 3V3 (P2 with 2 pins two.54mm) connector can be used to electrical power externally the WCH CH569 MCU (it is suggested to eliminate the P4/SHUNT in that case It's not at all required because the 3V3 LDO IC1 is secured agains