Uploaded July 2019 | Updated September 2026, 2 weeks ago

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So, about a year ago, I have posted a project called "MFRC522 RFID + Relay Module To Turn My PC On & Off. Using RFID Door Lock Code" it was my 2nd Arduino® Project. On that one, as the title says, I used an MFRC522 RFID Module and a Relay Module as a switch to turn my desktop computer ON or OFF.

Click here to check it out: youtube.com/watch?v=dfLldGzIo98

And almost a year later, this project was born out of curiosity. On this one, we will use a couple of things. An #ArduinoUNO board, an MFRC522 #RFID Module, an HC-05 #Bluetooth Module, and a 5V 10A Relay Module.

The main purpose of this project is to add another level of security to the RFID module by using the Bluetooth module and a transistor as a switch for the RFID module.

So that, the user can decide when to activate or deactivate the RFID reader's RFID reading function.

By deactivating the module, the RFID's RFID reading function will also be deactivated and no one can be granted access, unless the person who has the "key" or password to the bluetooth aka. switch chose to do so.

For example, if some baddies cloned your RFID card and tried to access or gain entry to somewhere where your RFID reader is deployed, they can't do anything because the modules' RFID reading capability is disabled.

In contrast, if the RFID module is just constantly active, and your RFID card has been duplicated, anyone can have access to anything that is protected by the RFID module.

Now, I'm not saying that this is the most secured setup, I mean, anything and anyone can be hacked these days.

But, if you're just going to use this at home or on an office, I think it would be enough.

TIMESTAMPS:

00:00 - Intro
01:49 - Things Needed
02:34 - Basic/Beginner Setup
06:51 - Demo
09:27 - ATcommands
12:33 - Intermediate Setup
14:08 - Demo
15:52 - Outro ****************************************************************************************************
NECESSARY LINKS:

HC-05 APK DL LINK: drive.google.com/file/d/1iALvtuqdoEnuEHxT4X9rf1s0gRXOAhM6

What is an APK: makeuseof.com/tag/what-is-apk-file

Make Your Own App Using MIT App Inventor: http://ai2.appinventor.mit.edu/

HC-05 AT Commands List: teachmemicro.com/hc-05-bluetooth-command-list

What is an AT Command: techopedia.com/definition/575/at-command-set

MFRC522 RFID Library: github.com/miguelbalboa/rfid/blob/master/src/MFRC522.cpp

How RFID Works: lastminuteengineers.com/how-rfid-works-rc522-arduino-tutorial

HC-05 Datasheet: components101.com/wireless/hc-05-bluetooth-module

HC-05 Datasheet Highlights: https://maker.pro/custom/tutorial/hc-05-bluetooth-transceiver-module-datasheet-highlights

Voltage Dividers Definition: learn.sparkfun.com/tutorials/voltage-dividers/all

Logic Levels: learn.sparkfun.com/tutorials/logic-levels/all

Arduino Project Hub [Schematics, Codes & Other Stuff]:

projecthub.arduino.cc/Heathen_Hacks-v2/pseudo-two-factor-authentication-using-hc-05-rfid-relay-dc3dda
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PLAYLISTS:

youtube.com/playlist?list=PLnJ6CeayQGsXtckTZsbf-o9ZQp0j5AtPX
youtube.com/playlist?list=PLnJ6CeayQGsXOvOIqtfdV1R2mZ7NwrkUN
youtube.com/playlist?list=PLnJ6CeayQGsXyz8CUWf-XM5yiIPVX7HAH
youtube.com/playlist?list=PLnJ6CeayQGsWKei0q76B0K-abl-uNfV9C
youtube.com/playlist?list=PLnJ6CeayQGsXometlrJ0e8e4h3yDLgOgT
youtube.com/playlist?list=PLnJ6CeayQGsUAT9Qcj9GxkHb_TWJRzCBR
youtube.com/playlist?list=PLnJ6CeayQGsXILXpLDGD-fO8qgBr-O3We
youtube.com/playlist?list=PLnJ6CeayQGsU8e5c8Cl__pAp9USXkg9qi
youtube.com/playlist?list=PLnJ6CeayQGsX0i20RY0Fv0XHlMYGu0ddh
youtube.com/playlist?list=PLnJ6CeayQGsUhviBKAtUhJ2qPvwMFJd2b
youtube.com/playlist?list=PLnJ6CeayQGsXqM4gXQvlqLiBD05cns2Tu
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Music Sources:

All background music tracks are from Youtube's Audio Library.

Intro and Outro Music From: bensound.com

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ANIME CLIPS:

KonoSuba
Gabriel DropOut
Grand Blue
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