Keyestudio KS0077, Manual, Page: 132 / 142

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// read card
blockAddr = 7;
// data block 7
status = MFRC522_Auth(PICC_AUTHENT1A, blockAddr,
sectorNewKeyA[blockAddr/4], serNum); // authentication
if (status == MI_OK)
{
// read data
blockAddr = blockAddr - 3 ;
status = MFRC522_Read(blockAddr, str);
if (status == MI_OK)
{
Serial.println("Read from the card ,the data is : ");
for (i=0; i<16; i++)
{
Serial.print(str[i]);
}
Serial.println(" ");
}
}
Serial.println(" ");
MFRC522_Halt(); // command card to enter standby mode
}
void Write_MFRC522(uchar addr, uchar val)
{
digitalWrite(chipSelectPin, LOW);
SPI.transfer((addr<<1)&0x7E);
SPI.transfer(val);
digitalWrite(chipSelectPin, HIGH);
}
uchar Read_MFRC522(uchar addr)
{
uchar val;
digitalWrite(chipSelectPin, LOW);
// address format: 1XXXXXX0