PN532 RFID Reader and ILI9341 Issue

[SteveJ789]

I am trying to use an 2.8" ILI9341 tft to display tag UID's read by a PN532 RFID reader using the Adafruit library. I am running the sketch on a Raspberry Pi Pico W.

The sketch runs as expected up to the point where the PN532 is called to read a tag. The sketch then runs very, very slowly from then on. A tag has to be held against the reader for some 30 seconds before anything is displayed on the ILI9341 . When the data is displayed, it is drawn on the display extremely slowly.

I have a version of the sketch using an OLED display which runs absolutely fine. I also have another version using MFRC Readers and the ILI9341 that also runs absolutely fine.

So, is there an issue or conflict with the TFT_eSPI library and Adafruit PN532 library. If so, is there anyway of resolving it?