We work with RC522 reader and Mifares Classic (1K or 4K) and Ultralight cards. Now, due to the client requirement we need to work with Mifare Plus in security level 1. This means that the card is emulating a Mifare 1K card.
The code to read/write Classic 1K cards should be valid for Plus cards. However, I discovered that the delay between Reset and Request needs to be longer. I empirically got the delay needed, but however I would like to find the information where it talks about it, or about the minimum delay needed.
Any help will be appreciated.