https://devzone.nordicsemi.com/f/nordic-q-a/115660/i-need-interface-the-mfrc522-with-nrf52833-using-zephyr-rtosHai, i try to MFRC522 rfid reader interface the nrf52833. 1. I try the read version from reader but it&#39;s only show the 0xFF 2.I try to read the card id . it is not work. I need solution for this. I attached the code below. mfrc522.c file mfrc522en-USTelligent Community 13Fri, 21 Nov 2025 15:41:37 GMThttps://devzone.nordicsemi.com/thread/555077?ContentTypeID=1Fri, 21 Nov 2025 15:41:37 GMT137ad170-7792-4731-bb38-c0d22fbe4515:407c512d-d666-46e5-ae62-65878e454b9fBitti_1<p>Hey Praveen, how did you solve the issue? im having same problems... could you please share your code so i could check whats wrong with mine.. thanks!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/512027?ContentTypeID=1Tue, 26 Nov 2024 05:08:23 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0f64e13a-205d-41b7-8602-a2fd9e66a07aM.Praveen<p>Hai,</p> <p>Thank you for reply.<br /><br />I solved the issue and get the output<br /><br />Regards,<br />Praveen M</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/507041?ContentTypeID=1Mon, 21 Oct 2024 05:18:24 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0fe542a6-91d2-4e93-865e-a75477581163Susheel Nuguru<p>You need to check&nbsp;why&nbsp;MFRC522_ToCard has returned with failed status. Start the debugger and step into that function and see where the failure happens exactly. Also connect the SPI pins to the logic analyzer or similar to see if there is any valid data transactions between that sensor and the nRF52 chip.</p> <p>We know that this reader works with nRF52832 (which should work similar on nRF52833) )and the source for that can be found <a href="https://github.com/mervedamar/MFRC522-NRF52">here</a>. You might need some porting efforts to port it to the newest SDK.</p><div style="clear:both;"></div>