2 door authentication project using Wiegand Keypad/Card reader and ESP8266 Wifi-capable or ATMega328P plain microcontroller
The libraries support up to 4 doors, and 32 RFID 12Khz cards max.
The same list of cards will be able to open all doors.
Master add/delete card can only be used in one door. These are defined at setup, changed only via factory reset.