Questions tagged as 'nfc'

Tagged questions
1
answer

NFC not mandatory for app in google play

I have an application that may or may not work with NFC . I have added these lines to manifest : <manifest>.. <uses-feature android:name="android.hardware.nfc" android:required="false" /> <uses-permission android:na...
asked by 23.01.2018 / 19:02
0
answers

How can I send a string to Arduino using an NFC shield?

I am trying to open an electronic lock with Arduino, an NFC Shield and my mobile device. I have designed an app in Android Studio in which I must enter a combination of 5 digits and activate the NFC synchronization to send the data to the NFC Sh...
asked by 06.06.2017 / 02:45
0
answers

How can I operate a 24V electric lock with Arduino?

I have a circuit where I connect an Arduino to an NFC Shield and this one to a breadboard. My goal is to activate an electric lock that works with 10-24V AC and DC, for this I have placed a 2N2222 transistor and a resistance of 330 Ohms. The...
asked by 15.05.2017 / 23:07
0
answers

What type of data do I get when reading a DNI with UFC?

I'm trying to implement an NFC reader in an Android app. Would someone know what format I would get the result of reading a DNI or any other type of card? Thank you.     
asked by 02.09.2018 / 03:11
1
answer

would like to know how to turn on a led when the if condition is met (compareArray (ActualUID, User1))

//RST D9 //SDA(SS) D10 //MOSI D11 //MISO D12 //SCK D13 #include <SPI.h> #include <MFRC522.h> int salida = 7; #define RST_PIN 9 //Pin 9 para el reset del RC522 #define SS_PIN 10 //Pin 1...
asked by 18.07.2018 / 03:52
0
answers

error 'MIFARE_Key' in 'class MFRC522' does not name a type

//RST D9 //SDA(SS) D10 //MOSI D11 //MISO D12 //SCK D13 #include <SPI.h> #include <MFRC522.h> const int RST_PIN = 9; const int SS_PIN = 10; //Declaracion de cadena de caracteres unsigned char...
asked by 16.07.2018 / 15:16
0
answers

Read multiple NFC cards from android (SERIALPORT)

Hello everyone, I'm making an application on android to read NFC cards and so far all the problem is that when I want to read more than one I just can not, I'm making a serial connection with the library UsbSerialForAndroid so far I read the d...
asked by 26.04.2018 / 01:09