can not write data to mifarecard

Question

I am using pn532 and ch340 with windows.

I can read mifare card data of 64 blocks.

and when I write to the card it return 0,but the data is not wrote to the card.

card.Common=Write16Bytes;

card.Data=new byte[16]{...data..};

var ret = card.RunMifareCardCommand();

the ret is 0;

when I read agian the data is not the data I want to write.

Then I use card.WriteDataBlock(0). it returns true.

but the data is not changed.

Answer 1

Hi. Thank you for your question and reaching out. I’d be more than happy to help you with your query

Download and install the MFRC522 library.

Go to File->Examples->MFRC522->ReadAndWrite.

File->Save Target As... You can save a duplicate that you can change.

Delete the reading sections you don't wish to read.

To write what you want, change the elements that do the writing.

If the reply was helpful, please don’t forget to upvote or accept as answer, thank you.