Recently, I fond that PN532 can't find some M1 card.the problem card of UID 'length is 4 bytes,and the first byte is 0x88 when I use pn512 device test . Just to be equal to the CT, but the UID is 4 bytes can compute the ATQA to reach. But the pn532 return no cards. I guess that PN532 deal the first byte 0x88 as equal to CT,then consider the UID more than 4 bytes, then return no card.
can you test this situation? And sove it