Fienchengarage Client Hardware ESP D1 Shield Alhua PIN Pad Relais or Relais Shield Setup Copy config.sample.h to config.h PIN Wiring No Color Function 1 Red 12V 2 Black GND 3 Blue Wiegand Alarm 4 White Wiegand D1 5 Green Wiegand D0 6 Brown Wiegand LED 7 Yellow RS485- 8 Purple RS485+ https://us.dahuasecurity.com/wp-content/uploads/2017/11/DHI_ASR1101M_Fingerprint-Access-Standalone-Users-Manual-V1.1.1-201805.pdf