in_frame = dev->in_urb->transfer_buffer;
 
+       print_hex_dump(KERN_DEBUG, "PN533 RX: ", DUMP_PREFIX_NONE, 16, 1,
+                      in_frame, PN533_FRAME_SIZE(in_frame), false);
+
        if (!pn533_rx_frame_is_valid(in_frame)) {
                nfc_dev_err(&dev->interface->dev, "Received an invalid frame");
                dev->wq_in_error = -EIO;
        dev->in_urb->transfer_buffer = in_frame;
        dev->in_urb->transfer_buffer_length = in_frame_len;
 
+       print_hex_dump(KERN_DEBUG, "PN533 TX: ", DUMP_PREFIX_NONE, 16, 1,
+                      out_frame, PN533_FRAME_SIZE(out_frame), false);
+
        rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
        if (rc)
                return rc;