The reader initializes the conversation. The RF area is activated, and several other low stage commands are exchanged to detect a compatible card. 1x GND 3V3 (P2 with two pins 2.54mm) connector can be used to energy externally the WCH CH569 MCU (it is recommended to eliminate the P4/SHUNT in https://hydrabus29406.blogvivi.com/33764864/the-hydrabus-diaries