Good day, I really like your job and I think I've skills that can assist you. Your software is submitted. 1x GND 3V3 (P2 with 2 pins 2.54mm) connector may be used to power externally the WCH CH569 MCU (it is suggested to eliminate the P4/SHUNT in that case It's https://codyprpjf.wssblogs.com/33138779/indicators-on-hydrabus-you-should-know