Arduino nano et LCD et RFID
J'ai vu chez ma Veto un super truc pour lire la puce electronique de mon chat.
Je me suis dis je vais faire pareil, j'ai un écran LCD, un arduino et un lecteur RFID.
(Mauvaise fréquence pour le lecteur RFID mais c'est pas grave)
(Je voulais utiliser mon nouveau MAX7219, mais le lecteur RFID utilise les mêmes ports I2C donc il aurait fallu acheter une carte d'entrée sortie, donc je me suis rabatu sur l'écran LCD qui intégre un module arduino qui gère l'I2C(si j'ai bien compris) de plus, les pins sont différentes, et les alimentations également :D )
Branchements:
NANO / LCD
GND sur GND
5V sur 5V
A4 sur SDA
A5 sur SCL
NANO / RFID-RC522
D10 sur SDA
D13 sur SCK
D11 sur MOSI
D12 sur MISO
ne pas brancher l'IRQ du RC522
GND<> GND
D9 sur RST
3.3V<> 3.3V
Code:
#include <LiquidCrystal_I2C.h> #include <RCSwitch.h> #include <SPI.h> #include <MFRC522.h> #define SS_PIN 10 #define RST_PIN 9 MFRC522 rfid(SS_PIN, RST_PIN); // Instance of the class MFRC522::MIFARE_Key key; // Init array that will store new NUID byte nuidPICC[4]; //config ecran RCSwitch mySwitch = RCSwitch(); LiquidCrystal_I2C lcd(0x27, 20, 4); void setup() { Serial.begin(9600); lcd.init(); SPI.begin(); // Init SPI bus rfid.PCD_Init(); // Init MFRC522 for (byte i = 0; i < 6; i++) { key.keyByte[i] = 0xFF; } Serial.println(F("This code scan the MIFARE Classsic NUID.")); Serial.print(F("Using the following key:")); printHex(key.keyByte, MFRC522::MF_KEY_SIZE); } void loop() { lcd.backlight(); // Look for new cards if ( ! rfid.PICC_IsNewCardPresent()) return; // Verify if the NUID has been readed if ( ! rfid.PICC_ReadCardSerial()) return; Serial.print(F("PICC type: ")); MFRC522::PICC_Type piccType = rfid.PICC_GetType(rfid.uid.sak); Serial.println(rfid.PICC_GetTypeName(piccType)); // Check is the PICC of Classic MIFARE type if (piccType != MFRC522::PICC_TYPE_MIFARE_MINI && piccType != MFRC522::PICC_TYPE_MIFARE_1K && piccType != MFRC522::PICC_TYPE_MIFARE_4K) { Serial.println(F("Your tag is not of type MIFARE Classic.")); return; } if (rfid.uid.uidByte[0] != nuidPICC[0] || rfid.uid.uidByte[1] != nuidPICC[1] || rfid.uid.uidByte[2] != nuidPICC[2] || rfid.uid.uidByte[3] != nuidPICC[3] ) { Serial.println(F("A new card has been detected.")); // Store NUID into nuidPICC array for (byte i = 0; i < 4; i++) { nuidPICC[i] = rfid.uid.uidByte[i]; } Serial.println(F("The NUID tag is:")); Serial.print(F("In hex: ")); printHex(rfid.uid.uidByte, rfid.uid.size); Serial.println(); Serial.print(F("In dec: ")); printDec(rfid.uid.uidByte, rfid.uid.size); Serial.println(); } else Serial.println(F("Card read previously.")); // Halt PICC rfid.PICC_HaltA(); // Stop encryption on PCD rfid.PCD_StopCrypto1(); } /** * Helper routine to dump a byte array as hex values to Serial. */ void printHex(byte *buffer, byte bufferSize) { String cardID = ""; for (byte i = 0; i < bufferSize; i++) { Serial.print(buffer[i] < 0x10 ? " 0" : " "); Serial.print(buffer[i], HEX); cardID += String(buffer[i], HEX); } lcd.clear(); lcd.setCursor(0,0); lcd.print(cardID); } /** * Helper routine to dump a byte array as dec values to Serial. */ void printDec(byte *buffer, byte bufferSize) { for (byte i = 0; i < bufferSize; i++) { Serial.print(buffer[i] < 0x10 ? " 0" : " "); Serial.print(buffer[i], DEC); } }Un code plus simple que le mien:
https://www.hackster.io/ravee-tansangworn/reading-rfid-card-or-key-ring-and-display-on-lcd-b2f70d
#include "LiquidCrystal_I2C.h" #include "RFID.h" #define SS_PIN A2 #define RST_PIN D3 int led1 = D7; MFRC522 mfrc522(SS_PIN, RST_PIN); // Create MFRC522 instance. LiquidCrystal_I2C lcd(0x27,20,4); void setup() { lcd.init(); lcd.backlight(); SPI.begin(); SPI.setClockDivider(SPI_CLOCK_DIV8); pinMode(led1, OUTPUT); mfrc522.PCD_Init(); } void loop() { digitalWrite(led1, LOW); // Look for new cards, if nothing found, quit if ( ! mfrc522.PICC_IsNewCardPresent()) { return; } // Select one of the cards, if nothing found, quit if ( ! mfrc522.PICC_ReadCardSerial()) { return; } String cardID = ""; for (byte i = 0; i < mfrc522.uid.size; i++) { cardID += String(mfrc522.uid.uidByte[i] < 0x10 ? "0" : ""); cardID += String(mfrc522.uid.uidByte[i], HEX); } digitalWrite(led1, HIGH); lcd.print(cardID); mfrc522.PICC_HaltA(); delay(10000); lcd.clear(); }
