I'm having a hard time figuring out how to emulate 13.56Mhz RFID Mifare tags using Arduino and basic components i have tested some ideas but i couldn't read bytes due to difference in protocols and frequencies i even opened a new Mifare 1k tag and soldered its coil to the circuit to avoid errors in induction calculation and i have calculated the frequency but im out of luck, i already found many similar projects for 125khz but i have the rc522 RFID reader so i can't test 125khz yet,

and for 125khz i found this:



(www.instructables.com/id/Stupid-Simple-Arduino-LF-RFID-Tag-Spoofer/) This is the code i have used

int coil_pin = 9;
void setup(){
    //Set pin as output
    pinMode(coil_pin, OUTPUT);

   //Start it as low
   digitalWrite(coil_pin, LOW);

//Does manchester encoding for signal and sets pins.
//Needs clock and signal to do encoding
void set_pin_manchester(int clock_half, int signal)
   //manchester encoding is xoring the clock with the signal
   int man_encoded = clock_half ^ signal;

   //if it's 1, set the pin LOW (this will tune the antenna and the reader 
    sees this as a high signal)
   //if it's 0, set the pin to HIGH  (this will detune the antenna and the 
    reader sees this as a low signal)
 if(man_encoded == 1)
     digitalWrite(coil_pin, LOW);
      digitalWrite(coil_pin, HIGH);


 void loop()
 //this is the card data we're spoofing.  It's basically 10 hex F's
 int data_to_spoof[64] = {1,1,1,1,1,1,1,1,1, 1,1,1,1,0 ,1,1,1,1,0, 1,1,1,1,0  
 ,1,1,1,1,0, 1,1,1,1,0 ,1,1,1,1,0, 1,1,1,1,0 ,1,1,1,1,0, 1,1,1,1,0 
 ,1,1,1,1,0, 0,0,0,0,0};
 for(int i = 0; i < 32; i++)
     set_pin_manchester(0, data_to_spoof[i]);

     set_pin_manchester(1, data_to_spoof[i]);

The schematics enter image description here

Also tried this, with difference in capacitor and inductor values as i'm working with 13.56Mhz

enter image description here

I appreciate any help

  • "i've tested some idea" is anything but a clear problem statement. – Dmitry Grigoryev Jul 26 '17 at 14:50
  • seriously man: i even open a new Mifare 1k tag and solder its coil to the circuit to avoid error in induction – Ninja Jul 26 '17 at 15:03
  • it's a lot of trial and errors for the last couple days even me can't remember all what i tested – Ninja Jul 26 '17 at 15:04
  • Welcome to EE.SE. Can we encourage you to capitalise and punctuate properly for legibility and credibility. Your Arduino compiler wouldn't let you away with it. – Transistor Jul 26 '17 at 15:28
  • sure i will review it – Ninja Jul 26 '17 at 15:32

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