mirror of https://github.com/arendst/Tasmota.git
68 lines
3.6 KiB
C++
68 lines
3.6 KiB
C++
/*
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* --------------------------------------------------------------------------------------------------------------------
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* Example sketch/program showing how to read data from a PICC to serial.
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* --------------------------------------------------------------------------------------------------------------------
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* This is a MFRC522 library example; for further details and other examples see: https://github.com/miguelbalboa/rfid
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*
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* Example sketch/program showing how to read data from a PICC (that is: a RFID Tag or Card) using a MFRC522 based RFID
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* 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 below), load this sketch into Arduino IDE
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* then verify/compile and upload it. To see the output: use Tools, Serial Monitor of the IDE (hit Ctrl+Shft+M). When
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* you present a PICC (that is: a RFID Tag or Card) at reading distance of the MFRC522 Reader/PCD, the serial output
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* will show the ID/UID, type and any data blocks it can read. Note: you may see "Timeout in communication" messages
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* when removing the PICC from reading distance too early.
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*
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* If your reader supports it, this sketch/program will read all the PICCs presented (that is: multiple tag reading).
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* So if you stack two or more PICCs on top of each other and present them to the reader, it will first output all
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* details of the first and then the next PICC. Note that this may take some time as all data blocks are dumped, so
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* keep the PICCs at reading distance until complete.
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*
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* @license Released into the public domain.
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*
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* Typical pin layout used:
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* -----------------------------------------------------------------------------------------
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* MFRC522 Arduino Arduino Arduino Arduino Arduino
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* Reader/PCD Uno/101 Mega Nano v3 Leonardo/Micro Pro Micro
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* Signal Pin Pin Pin Pin Pin Pin
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* -----------------------------------------------------------------------------------------
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* RST/Reset RST 9 5 D9 RESET/ICSP-5 RST
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* SPI SS SDA(SS) 10 53 D10 10 10
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* SPI MOSI MOSI 11 / ICSP-4 51 D11 ICSP-4 16
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* SPI MISO MISO 12 / ICSP-1 50 D12 ICSP-1 14
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* SPI SCK SCK 13 / ICSP-3 52 D13 ICSP-3 15
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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 // Configurable, see typical pin layout above
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#define SS_PIN 10 // Configurable, see typical pin layout above
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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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while (!Serial); // Do nothing if no serial port is opened (added for Arduinos based on ATMEGA32U4)
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SPI.begin(); // Init SPI bus
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mfrc522.PCD_Init(); // Init MFRC522
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delay(4); // Optional delay. Some board do need more time after init to be ready, see Readme
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mfrc522.PCD_DumpVersionToSerial(); // Show details of PCD - MFRC522 Card Reader details
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Serial.println(F("Scan PICC to see UID, SAK, type, and data blocks..."));
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}
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void loop() {
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// Reset the loop if no new card present on the sensor/reader. This saves the entire process when idle.
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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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