Esp8266/arduino powered keycard access system.
- NodeMCU for internet connectivity.
- Atmega8 to handle reader and door solenoid.
- Shared i2c EEPROM to store card info connected to NodeMCU
- 3mm audio jack for current transformer connected to node and atmega
- 7 GPIO
- 4 MOSFET solenoid drivers
- connects to any reader that can output wiegand data (we use a hid prox reader)
