i am using esp32 board and pn532 module in SPI mode .tried sending data to pn532 from android device over nfc using app called nfc tools and more but in the serial monitor of IDE I keep gettting "Unknown TLV"error .
You need to post the full code. Eventually also the schematics.
Check your code is handling of received data. The error may be from the parsing logic that doesn’t recognize the incoming TLV format.
@Railroader actually i tried writing my own code and even tried the example codes from pn532 library by adafruit and elechouse but in all three cases i wasn't getting the outcome and was not able to communicate with the pn532 using phone's nfc .so if someone can guide me how can i achieve this cuz i tried googling it so much and at the end i got to know that i should be sending messages in the ndef format .
also when i tried writing a passive tag from phone it was successful and then using tag for pn532 then pn532 can successfully read it but when it came to passing message directly through phone neglecting the passive tag ...the experiment failed .
@aliarifat794
Please post Your best attempt to let forum see what can be done.
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