We need to read/write 125kHz tags and emulate it with the same antenna.
As far I know the popular modules like RDM6300 can only read tags
We are looking for the chip that can:
- Read LF tags and send the ID over I2C/SPI/UART
- Write ID to rewriteable cards like T5577 by receiving ID to write over I2C/SPI/UART
- Simulating tag by receiving ID to simulate over I2C/SPI/UART
I’m not sure that chip with this functionality even exist. So probably we need to do whole 125kHz RFID stack manually on the MCU.
Here is the some projects for reference:
Software 125khz emulation on Arduino https://github.com/AlexMalov/EasyKeyDublicatorRFID
Software 125khz emulation on ESP8266 https://github.com/Crypter/ESP-RFID