https://devzone.nordicsemi.com/f/nordic-q-a/55798/pca10056-version-of-adafruit_tag_reader-example-ends-with-err_code-0x03I have the nRF52840-DK with the adafruit PN532 RFID/NFC shield installed on top of it. I run the TWI Scanner and receive a report that a device was found at address 0x24. I then load the .emproject for the adafruit tag reader example for the 10056en-USTelligent Community 13Wed, 18 Dec 2019 19:48:58 GMThttps://devzone.nordicsemi.com/thread/226226?ContentTypeID=1Wed, 18 Dec 2019 19:48:58 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9bf328e6-8fba-4dd4-bf84-78c47a7a75c1JWizard<p>Ha! The previous owner of my PN532 shield had cut the traces which take the IRQ signal out to the pin headers. False Alarm.</p><div style="clear:both;"></div>