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Create mfrc522_i2c.ino

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Semaf Electronics
2018-06-24 15:31:58 +02:00
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commit 6c9726e01d
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#include <Wire.h>
#include "MFRC522_I2C.h"
#define RST_PIN 6 // Arduino UNO Pin
// #define RST_PIN 14 // D5 Pin on NodeMCU
// 0x28 is i2c address on SDA. Check your address with i2cscanner if not match.
MFRC522 mfrc522(0x28, RST_PIN); // Create MFRC522 instance.
void setup() {
Serial.begin(115200); // Initialize serial communications with the PC
Wire.begin(); // Initialize I2C
mfrc522.PCD_Init(); // Init MFRC522
ShowReaderDetails(); // Show details of PCD - MFRC522 Card Reader details
Serial.println(F("Scan PICC to see UID, type, and data blocks..."));
}
void loop() {
// Look for new cards, and select one if present
if ( ! mfrc522.PICC_IsNewCardPresent() || ! mfrc522.PICC_ReadCardSerial() ) {
delay(50);
return;
}
// Now a card is selected. The UID and SAK is in mfrc522.uid.
// Dump UID
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();
}
void ShowReaderDetails() {
// Get the MFRC522 software version
byte v = mfrc522.PCD_ReadRegister(mfrc522.VersionReg);
Serial.print(F("MFRC522 Software Version: 0x"));
Serial.print(v, HEX);
if (v == 0x91)
Serial.print(F(" = v1.0"));
else if (v == 0x92)
Serial.print(F(" = v2.0"));
else
Serial.print(F(" (unknown)"));
Serial.println("");
// When 0x00 or 0xFF is returned, communication probably failed
if ((v == 0x00) || (v == 0xFF)) {
Serial.println(F("WARNING: Communication failure, is the MFRC522 properly connected?"));
}
}