The reader initializes the interaction. The RF field is activated, and a number of other small degree instructions are exchanged to detect a compatible card. 1x GND 3V3 (P2 with two pins 2.54mm) connector may be used to power externally the WCH CH569 MCU (it is suggested to eliminate the https://hydrabus41738.dm-blog.com/33200973/hydrabus-options