how i can build app that can read and write 13mhz RF ID cards

Projects General Guidance
1

hi

sorry for my bad English

what i need ??

i wanna know what i need to build app that can read and write RF ID cards

like (( what i wanna write )) name age phone address Blood Group etc

i know that my RF ID card have eeprom with 1k

i can build app with QT or processing

my problem is ?

that how i can interface my board to the QT or Processing

how i can print what RS-522 RF ID reader library read to my app

and how i can write what i wanna to it like what i do in serial via the RS-522 library

i hope i can find examples for what i need

sorry if i write what i wanna in wrong forum

thanks for help :slight_smile:

2

If you try a google search for Arduino RFID you will find lots and lots of tutorial examples. The majority of these are wrong because they show the Arduino’s pins being directly connected to a readers.

Some claim that the reader’s have 5V tolerant input pins, they do not. So look for an example that shows some sort of level shifters between the output pins of an Arduino and the reader. Or use an Arduino that uses a 3V3 processor.

3

I think you mean "RC522".

The RC522 chip has a built-in UART. With a level shifter, such as the Maxim RS232 tranceivers, you could connect it directly to the serial port of your PC and not need an Arduino at all.

https://www.maximintegrated.com/en/design/technical-documents/tutorials/2/2020.html

4

The RC522 chip has a built-in UART.

Most RC522 chips are on boards that limit the available interface to an SPI one.