Upon scanning the right tag and entering right pass, it will open door and send confirmation message otherwise it will send alert message.

In the previous post, you learned about RFID and keypad based door lock system in which you had to first scan the right tag and then enter the correct password to open the door lock. Now we are going to add the Sim900 module in that system to make it an RFID and Keypad based Door lock and alert system using Arduino.

This is third article of the RFID Arduino series. All articles of RFID Arduino series are as follows

- RFID Basics and RFID Module interfacing with Arduino
- RFID and Keypad based Door Lock using Arduino
- RFID and Keypad based Door Lock and Alert System using Arduino
- RFID based Access Control System using Arduino
- RFID based Access Control and Alert System using Arduino
- RFID and Keypad based Access Control using Arduino
- RFID and Keypad Based Access Control and Alert System using Arduino

Working of RFID and Keypad based Door lock and Alert System using Arduino
- On scanning the wrong tag or on entering the wrong password, it will send us an alert.
- On scanning the right tag and on entering the right password, it will send us a confirmation message that the door has opened.
- You can halt the system by sending ‘close’ message to Arduino and it will only go back to normal mode when you will send the ‘open’ message to Arduino. During halt time, it won’t scan any tags and it will only look for messages.
- You can also open the door by sending message to Arduino.”

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