Comments on: Security Access using MFRC522 RFID Reader with Arduino

By: Marcio

Marcio — Thu, 25 Apr 2024 17:27:46 +0000

In reply to william. fiz isso mas ai ele não bloqueia mais nenhum cartão

By: Black Box Engineering

Black Box Engineering — Thu, 26 Oct 2023 04:50:40 +0000

Do you happen to know the protocol for car keys that have those microchips in them? Thanks!

By: Liam

Liam — Thu, 31 Aug 2023 02:11:47 +0000

for multiple UIDs, use:
if (content.substring(1) == “UID #1” || content.substring(1) == “UID #2” ) {
{
Serial.println(“Authorized access”);
Serial.println();
delay(3000);
}

}
the last “}” is a space before “else”

By: Darryl

Darryl — Wed, 30 Aug 2023 07:28:23 +0000

Can i know how to connect multiple RFID reader to a arduino uno r3 with breed board. The wires setup.

By: Krishna

Krishna — Sat, 25 Mar 2023 02:18:38 +0000

Hello
I wanted help with a project using RFID and esp32 wroom to display the RFID output via Bluetooth onto my smartphone.can you please help me with the code for the same as I keep getting error when I combine the code for RFID tag detection and Bluetooth connection to smartphone

By: Sara Santos

Sara Santos — Sun, 05 Mar 2023 10:55:23 +0000

In reply to Farooq.

Hi.
I’m sorry, but we don’t have any tutorials about that subject.
Regards,
Sara

By: Farooq

Farooq — Sat, 04 Mar 2023 20:07:04 +0000

Is there any code that can help me make the RFID scanner RC522 work with the C++ in Keil studio, using Nucleo board F429ZI (comes with STM 32 microcontroller)

By: cice

cice — Fri, 03 Mar 2023 05:28:42 +0000

Arduino: 1.8.18 (Windows 10), Board: “Arduino Uno”

DumpInfo:107:16: error: redefinition of ‘MFRC522 mfrc522’

MFRC522 mfrc522(SS_PIN, RST_PIN); // Create MFRC522 instance

^

C:\Users\nick\AppData\Local\Temp\arduino_modified_sketch_50484\DumpInfo.ino:15:9: note: ‘MFRC522 mfrc522’ previously declared here

MFRC522 mfrc522(SS_PIN, RST_PIN); // Create MFRC522 instance.

^~~~~~~

C:\Users\nick\AppData\Local\Temp\arduino_modified_sketch_50484\DumpInfo.ino: In function ‘void setup()’:

DumpInfo:109:6: error: redefinition of ‘void setup()’

void setup() {

^~~~~

C:\Users\nick\AppData\Local\Temp\arduino_modified_sketch_50484\DumpInfo.ino:17:6: note: ‘void setup()’ previously defined here

void setup()

^~~~~

C:\Users\nick\AppData\Local\Temp\arduino_modified_sketch_50484\DumpInfo.ino: In function ‘void loop()’:

DumpInfo:119:6: error: redefinition of ‘void loop()’

void loop() {

^~~~

C:\Users\nick\AppData\Local\Temp\arduino_modified_sketch_50484\DumpInfo.ino:26:6: note: ‘void loop()’ previously defined here

void loop()

^~~~

Multiple libraries were found for “MFRC522.h”

Used: C:\Users\nick\OneDrive\Documents\Arduino\libraries\MFRC522

Not used: C:\Users\nick\OneDrive\Documents\Arduino\libraries\MFRC522-spi-i2c-uart-async

exit status 1

redefinition of ‘MFRC522 mfrc522’

This report would have more information with
“Show verbose output during compilation”
option enabled in File -> Preferences.
this is what i get i am getting

By: Montgomery Newcom

Montgomery Newcom — Sun, 22 Jan 2023 01:52:33 +0000

In reply to Ata.

RC522 -> ESP32
SDA(SS) -> GPIO21,
SCK -> GPIO18,
MOSI -> GPIO23,
MISO -> GPIO19,
IRQ -> –,
GND -> GND,
RST -> GPIO17,
3v3 -> 3v3

By: simon

simon — Tue, 20 Dec 2022 21:48:04 +0000

In reply to Michael O'Connor. }