mirror of https://github.com/arendst/Tasmota.git
111 lines
4.1 KiB
Arduino
111 lines
4.1 KiB
Arduino
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/*
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* --------------------------------------------------------------------------------------------------------------------
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* Example to change UID of changeable MIFARE card.
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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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* This sample shows how to set the UID on a UID changeable MIFARE card.
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*
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* @author Tom Clement
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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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/* Set your new UID here! */
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#define NEW_UID {0xDE, 0xAD, 0xBE, 0xEF}
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MFRC522::MIFARE_Key key;
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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 card
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Serial.println(F("Warning: this example overwrites the UID of your UID changeable card, use with care!"));
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// Prepare key - all keys are set to FFFFFFFFFFFFh at chip delivery from the factory.
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for (byte i = 0; i < 6; i++) {
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key.keyByte[i] = 0xFF;
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}
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}
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// Setting the UID can be as simple as this:
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//void loop() {
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// byte newUid[] = NEW_UID;
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// if ( mfrc522.MIFARE_SetUid(newUid, (byte)4, true) ) {
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// Serial.println("Wrote new UID to card.");
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// }
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// delay(1000);
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//}
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// But of course this is a more proper approach
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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. And if present, select one.
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if ( ! mfrc522.PICC_IsNewCardPresent() || ! mfrc522.PICC_ReadCardSerial() ) {
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delay(50);
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return;
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}
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// Now a card is selected. The UID and SAK is in mfrc522.uid.
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// Dump UID
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Serial.print(F("Card UID:"));
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for (byte i = 0; i < mfrc522.uid.size; i++) {
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Serial.print(mfrc522.uid.uidByte[i] < 0x10 ? " 0" : " ");
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Serial.print(mfrc522.uid.uidByte[i], HEX);
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}
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Serial.println();
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// Dump PICC type
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// MFRC522::PICC_Type piccType = mfrc522.PICC_GetType(mfrc522.uid.sak);
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// Serial.print(F("PICC type: "));
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// Serial.print(mfrc522.PICC_GetTypeName(piccType));
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// Serial.print(F(" (SAK "));
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// Serial.print(mfrc522.uid.sak);
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// Serial.print(")\r\n");
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// if ( piccType != MFRC522::PICC_TYPE_MIFARE_MINI
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// && piccType != MFRC522::PICC_TYPE_MIFARE_1K
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// && piccType != MFRC522::PICC_TYPE_MIFARE_4K) {
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// Serial.println(F("This sample only works with MIFARE Classic cards."));
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// return;
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// }
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// Set new UID
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byte newUid[] = NEW_UID;
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if ( mfrc522.MIFARE_SetUid(newUid, (byte)4, true) ) {
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Serial.println(F("Wrote new UID to card."));
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}
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// Halt PICC and re-select it so DumpToSerial doesn't get confused
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mfrc522.PICC_HaltA();
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if ( ! mfrc522.PICC_IsNewCardPresent() || ! mfrc522.PICC_ReadCardSerial() ) {
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return;
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}
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// Dump the new memory contents
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Serial.println(F("New UID and contents:"));
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mfrc522.PICC_DumpToSerial(&(mfrc522.uid));
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delay(2000);
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}
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