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- // O sistema faz a luz apagar e envia uma mensagem para o serial quando o tag é afastado.
- // Agradecimentos a Nelson Toshio Hirai e Rhaicmer Braulio da Costa do Labdegaragem
- #include <SPI.h>
- #include <MFRC522.h>
- #define SS_PIN 8
- #define RST_PIN 9
- MFRC522 mfrc522(SS_PIN, RST_PIN); // Cria MFRC522 instance.
- int ledpin5 = 5;
- char st[20];
- byte State = 0;
- void setup()
- {
- Serial.begin(9600);
- SPI.begin(); // Inicia SPI bus
- mfrc522.PCD_Init(); // Inicia MFRC522
- pinMode (ledpin5 , OUTPUT) ;
- }
- void loop()
- {
- // Se o ledpin5 estiver acesso envia print "k"
- if( digitalRead(ledpin5) == HIGH )
- { Serial.println("k");
- delay(2000);}
- // Select one of the cards
- if ( ! mfrc522.PICC_ReadCardSerial())
- // Look for new cards
- if ( ! mfrc522.PICC_IsNewCardPresent())
- { //Acende o ledpin5
- digitalWrite (ledpin5 , HIGH);
- return ;
- }
- //Serial.print("UID da tag :");
- String conteudo= "";
- byte letra;
- for (byte i = 0; i < mfrc522.uid.size; i++)
- {
- //Serial.print(mfrc522.uid.uidByte[i] < 0x10 ? " 0" : " ");
- //Serial.print(mfrc522.uid.uidByte[i], HEX);
- conteudo.concat(String(mfrc522.uid.uidByte[i] < 0x10 ? " 0" : " "));
- conteudo.concat(String(mfrc522.uid.uidByte[i], HEX));
- }
- conteudo.toUpperCase();
- if (conteudo.substring(1) == "53 0A 6D D9") //UID 1 - Chaveiro
- {
- digitalWrite (ledpin5 , LOW);
- //Serial.println("standby");
- }
- delay(500);
- }
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