88 lines
3.3 KiB
C++
88 lines
3.3 KiB
C++
/*
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* ----------------------------------------------------------------------------
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* This is a MFRC522 library example; see https://github.com/miguelbalboa/rfid
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* for further details and other examples.
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*
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* NOTE: The library file MFRC522.h has a lot of useful info. Please read it.
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*
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* Released into the public domain.
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* ----------------------------------------------------------------------------
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* Example sketch/program showing how to read data from a PICC (that is: a RFID
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* Tag or Card) using a MFRC522 based RFID Reader on the Arduino SPI interface.
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*
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* When the Arduino and the MFRC522 module are connected (see the pin layout
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* below), load this sketch into Arduino IDE then verify/compile and upload it.
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* To see the output: use Tools, Serial Monitor of the IDE (hit Ctrl+Shft+M).
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* When you present a PICC (that is: a RFID Tag or Card) at reading distance
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* of the MFRC522 Reader/PCD, the output will show the ID, type and any data
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* blocks it can read. Note that you may see some "Timeout in communication"
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* messages when removing the PICC from reading distance to early.
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*
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* If your reader supports it, this sketch/program will read all the PICCs
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* presented (that is: multiple tag reading). So if you stack* two or more
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* PICCs on top of each other and present them to the reader, it will first
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* output all details of the first and then the next PICC. Note that this
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* may take some time as all data blocks are dumped, so keep the PICCs at
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* reading distance until complete.
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*
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* Typical pin layout used:
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* ------------------------------------------------------------
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* MFRC522 Arduino Arduino Arduino
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* Reader/PCD Uno Mega Nano v3
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* Signal Pin Pin Pin Pin
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* ------------------------------------------------------------
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* RST/Reset RST 9 5 D9
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* SPI SS SDA 10 53 D10
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* SPI MOSI MOSI 11 51 D11
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* SPI MISO MISO 12 50 D12
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* SPI SCK SCK 13 52 D13
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*/
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#include <SPI.h>
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#include <MFRC522.h>
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#define RST_PIN 9 //
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#define SS_PIN 10 //
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MFRC522 mfrc522(SS_PIN, RST_PIN); // Create MFRC522 instance
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void setup() {
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Serial.begin(9600); // Initialize serial communications with the PC
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SPI.begin(); // Init SPI bus
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mfrc522.PCD_Init(); // Init MFRC522
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ShowReaderDetails(); // Show details of PCD - MFRC522 Card Reader details
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Serial.println("Scan PICC to see UID, type, and data blocks...");
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}
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void loop() {
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// Look for new cards
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if ( ! mfrc522.PICC_IsNewCardPresent()) {
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return;
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}
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// Select one of the cards
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if ( ! mfrc522.PICC_ReadCardSerial()) {
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return;
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}
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// Dump debug info about the card; PICC_HaltA() is automatically called
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mfrc522.PICC_DumpToSerial(&(mfrc522.uid));
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}
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void ShowReaderDetails() {
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// Get the MFRC522 software version
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byte v = mfrc522.PCD_ReadRegister(mfrc522.VersionReg);
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Serial.print("MFRC522 Software Version: 0x");
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Serial.print(v, HEX);
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if (v == 0x91)
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Serial.print(" = v1.0");
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else if (v == 0x92)
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Serial.print(" = v2.0");
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else
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Serial.print(" (unknown)");
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Serial.println("");
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// When 0x00 or 0xFF is returned, communication probably failed
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if ((v == 0x00) || (v == 0xFF)) {
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Serial.println("WARNING: Communication failure, is the MFRC522 properly connected?");
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}
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} |