Problem for presence tag

[umbertoge]

Hi i test library for rc522.... but i have problem with command for read tag in the zone.....

if i call this routine, the answer (return) with tag on the antenna is in sequence 00,02,00,02,00,02 but with tag in the rfid signal, the answer muste be always 00,00,00,00,

why? thanks

/**

• Returns true if a PICC responds to PICC_CMD_REQA.
• Only "new" cards in state IDLE are invited. Sleeping cards in state HALT are ignored.

• @return bool */ bool MFRC522::PICC_IsNewCardPresent() { byte bufferATQA[2]; byte bufferSize = sizeof(bufferATQA);

  // Reset baud rates PCD_WriteRegister(TxModeReg, 0x00); PCD_WriteRegister(RxModeReg, 0x00); // Reset ModWidthReg PCD_WriteRegister(ModWidthReg, 0x26);

  MFRC522::StatusCode result = PICC_RequestA(bufferATQA, &bufferSize); return (result == STATUS_OK || result == STATUS_COLLISION); } // End PICC_IsNewCardPresent()

[Rotzbua]

1. Environment information?
2. Return value of 02 on a bool func?