M5Stack - Simple Applications for RFID- Arduino

[Ddaniel]

HI,
I would like to connect a RFID reader to a M5Stack, I have a RC522 sensor witch is connected like this SDA to SDA, SCK to SCK, MOSI to MO, MI to MI, Reset to 1. I have this code:

#include <SPI.h>
#include <MFRC522.h>
#include <M5Stack.h>

#define RST_PIN 1 //Pin 1 para el reset del RC522
#define SS_PIN 21 //Pin 21 para el SS (SDA) del RC522
MFRC522 mfrc522(SS_PIN, RST_PIN); //Creamos el objeto para el RC522

void setup() {
M5.begin();
Serial.begin(9600); //Iniciamos la comunicación serial
SPI.begin(); //Iniciamos el Bus SPI
mfrc522.PCD_Init(); // Iniciamos el MFRC522
Serial.println("Lectura del UID");
M5.Lcd.println("Lectura del UID");
}

void loop() {
// Revisamos si hay nuevas tarjetas presentes
if ( mfrc522.PICC_IsNewCardPresent())
{
//Seleccionamos una tarjeta
if ( mfrc522.PICC_ReadCardSerial())
{
// Enviamos serialemente su UID
Serial.print("Card UID:");
M5.Lcd.println("Card UID:");
for (byte i = 0; i < mfrc522.uid.size; i++) {
Serial.print(mfrc522.uid.uidByte[i] < 0x10 ? " 0" : " ");
M5.Lcd.print (mfrc522.uid.uidByte[i] < 0x10 ? " 0" : " ");
Serial.print(mfrc522.uid.uidByte[i], HEX);
M5.Lcd.print (mfrc522.uid.uidByte[i], HEX);
}
Serial.println();
M5.Lcd.println();
// Terminamos la lectura de la tarjeta actual
mfrc522.PICC_HaltA();
}
}
´´
Unfortunately does not work.
Please, could somebody give me an advise, something simple...
In the future I want to create a door access.
Thank you in advance.

[m5stack]

pin 1 is for serial0, maybe not good for this.

[dda]

#define RST_PIN 1 //Pin 1 para el reset del RC522

As @m5stack said, PIN 1 is used by Serial0. You should pick a GPIO that's not in use already.

[Ddaniel]

@dda Are there any other solucions to connect RFID to M5Stack?

[dda]

@ddaniel Read my answer again: don't use pin 1 for RST_PIN. Connect it to another pin that isn't used yet.

[Dave]

I am interested in a compact RFID reader with a feedback display.
I am wondering whether you have managed to build the sensor into the stack or whether it needs to be put off to the side somewhere?

[JJ]

@dave Hi Dave,

I have a RFID-RC522 module on order but hasn't arrived yet... Apparently the board dimensions are: 3.9 x 6 cm

So unfortunately it seems the whole module won't fit inside the M5 case....

Might be ok with just a little sticking out the side....

[jp128]

You could take a look at https://www.sparkfun.com/products/11828

It is somewhat more expensive, but has a body type that may be able to fit just fine into a different stack, or even the protoboard. They have other models as well.

[JJ]

@jp128 @Dave @ddaniel

Hi Jp128,
Thanks for the tip..... could be very useful.... more reading required....