ESP32 with two MFRC522

[jhnwmr]

Hello,
How can I use two of the RC522?
Few uids came up, but after this period the esp32 had no reaction. Only with an restart.

Where is the problem?
So my try:

#include <Wire.h>
#include "MFRC522_I2C.h"

MFRC522 mfrc522(0x2B, 2); 
MFRC522 mfrc522_2(0x28, 2);

void setup() {
  Serial.begin(115200);           
  Wire.begin();
  mfrc522.PCD_Init();
  mfrc522_2.PCD_Init(); 
  Serial.println(F("Scan UID"));
}

void loop() {

///////////////////////// DEV 1 ////////////////////////////////
 
  if (mfrc522.PICC_IsNewCardPresent() && mfrc522.PICC_ReadCardSerial()) {

  Serial.print(F("Card UID:"));
  for (byte i = 0; i < mfrc522.uid.size; i++) {
    Serial.print(mfrc522.uid.uidByte[i] < 0x10 ? " 0" : " ");
    Serial.print(mfrc522.uid.uidByte[i], HEX);
  } 
  Serial.println();
  }

///////////////////////// DEV 2 ////////////////////////////////  

  if (mfrc522_2.PICC_IsNewCardPresent() && 
  mfrc522_2.PICC_ReadCardSerial()) {

  Serial.print(F("Card UID:"));
  for (byte i = 0; i < mfrc522_2.uid.size; i++) {
    Serial.print(mfrc522_2.uid.uidByte[i] < 0x10 ? " 0" : " ");
    Serial.print(mfrc522_2.uid.uidByte[i], HEX);
  } 
  Serial.println();  
  }
}

[giorgio80]

same for me on esp32