The reader initializes the interaction. The RF area is activated, and several minimal amount commands are exchanged to detect a suitable card. 1x GND 3V3 (P2 with 2 pins 2.54mm) connector can be employed to energy externally the WCH CH569 MCU (it is suggested to remove the P4/SHUNT in that https://riverfypgx.mappywiki.com/1274897/the_definitive_guide_to_hydrabus