The reader initializes the conversation. The RF field is activated, and a number of other very low level instructions are exchanged to detect a appropriate card. 1x GND 3V3 (P2 with two pins 2.54mm) connector can be utilized to electric power externally the WCH CH569 MCU (it is recommended to https://hydrabus64219.blue-blogs.com/40354411/hydrabus-things-to-know-before-you-buy