A program to create a door-opener, based on UNO, to open a door with a password and/or NFC card. The solution is using a keypad, MFRC522 and LCD (16 x 2). These are often used hardware components that can be sourced from many places. The dooropener can be connected through a relay or any other electronic circuit. That is outside the scope of the project.
A detailed description of the options and findings are in dooropener.odt

There was someone on a forum looking for help to get a door-opener, based serial, keypad and MRFC522 card. He had some code, which was not working, copy / pasted together. The project looked interesting me, also I had all the components, except a door opener, and had couple of hours on my hand. I have extended the code with more functions and this document is the write up of the small project.

Please be aware that I have NOT written much of the code. It is coming from different sources from Internet, developed by others. I do not know who or where the real sources are coming from. Hence I do not claim copyright or apply a license. This is grapware… for you to play around and enjoy.
No Support, no warranty, no obligations. Just source code as-is !

Depending the exact sourced hardware components

https://github.com/Chris--A/Keypad
info : http://playground.arduino.cc/Code/Keypad

info : https://www.makerguides.com/character-i2c-lcd-arduino-tutorial/
info: https://www.arduinolibraries.info/libraries/liquid-crystal-i2-c
https://github.com/marcoschwartz/LiquidCrystal_I2C

info: https://playground.arduino.cc/Learning/MFRC522/
https://github.com/miguelbalboa/rfid

Obtain the zip and install like any other

Please see the description in the top of the sketch and read the documentation (odt)

• Initial version Arduino

• Included toggle EITHER/BOTH password option

• remove multiple PcdInit

• added storing new access passwrd in EEPROM when changed with special passwrd.
• added storing EITHER/BOTH in EEPROM when changed with special passwrd.
• added keypad selection KEYPAD 4x3 OR 4x4 setting

• Paul van Haastrecht ([email protected])

No License