# include # include LiquidCrystal液晶(2、3、4、5、6、7);/ / RS, E, d4, d5, d6, d7 // If this doesn't work, try switching rx and tx uFR reader(10, 11, 12); // rx, tx, reset //#define DEBUG_CODE void setup() { pinMode(LED_BUILTIN, OUTPUT); lcd.begin(16, 2); lcd.clear(); delay(100); reader.begin(); delay(2000); // Required! /* For testing purposes: * reader.setRedLED(HIGH); * delay(2000); * reader.setRedLED(HIGH); */ uint8_t type[4]; lcd.print("Code: "); lcd.print(reader.getReaderType(type), HEX); lcd.print(" Type:"); lcd.setCursor(0, 1); for (int i = 0; i < 4; i++) { lcd.print(type[i], HEX); lcd.print(" "); } delay(3000); lcd.clear(); lcd.print("Waiting for card"); } void loop() { uint8_t cardID[10]; uint8_t length = 0; uint8_t code = reader.getCardID(cardID, &length); if (code == 0) { lcd.clear(); lcd.print("Card found! UID:"); lcd.setCursor(0, 1); for (int i = 0; i < length; i++) { //show leading zero for 0x00 to 0x0F if(cardID[i] < 16) lcd.print("0"); lcd.print(cardID[i], HEX); } digitalWrite(LED_BUILTIN, HIGH); delay(3000); digitalWrite(LED_BUILTIN, LOW); lcd.clear(); lcd.print("Waiting for card"); } else if (code != NO_CARD) { #ifdef DEBUG_CODE lcd.print("Error code:"); lcd.setCursor(0, 1); lcd.print("0x"); lcd.print(code, HEX); delay(2000); lcd.clear(); lcd.print("Waiting for card"); #endif //DEBUG_CODE } // Reduce delay if response is slow delay(200); }

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