Usage of driver to write/read tags

[ghost2303]

Hi,

I know it's been a long time you worked on this code.
I use your code, because I want to use an ATMEGA328.

I have the following problem:
I want to write data to the tag, therefore, I need to authenticate in the first step.
As I understood your code, I have to use the command "mfrc522_to_card()" to authenticate and transceive data to/from tags (MIFARE tag).

Here's a simplified part how I do it:
{
// {authentification for key A, authenticate block 8, 6 bytes public key A, 4 bytes UID}
uint8_t auth_data[] = {PICC_AUTHENT1A, 0x08, 0xd3, 0xf7, 0xd3, 0xf7, 0xd3, 0xf7, 0xb9, 0xa0, 0xfd, 0xb8};
uint8_t auth_data_len = sizeof(auth_data);

// dummy for return data:
uint8_t data_return_block[] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
uint32_t* data_return_size = sizeof(data_return_block);

// authenticate block:
uint8_t ret2 = mfrc522_to_card(MFAuthent_CMD, &auth_data[0], auth_data_len, &data_return_block[0], &data_return_size);
}

ret2 always returns value of ERROR (0x03). Public key and UID were read out using an app on my smartphone, so they should be ok.

Have you ever tried reading, writing, or at least authenticate the tag?
Do you remember any issues using this sequence?

I would appreciate if you would take some minutes of your time to help me with this issue.

Many thanks in advance!

BR, Thomas

[asif-mahmud]

i am on journey right now. will be able to look at it tomorrow. will let you know if i find something for you. Best wishes - Asif Mahmud Shimon

…

On Tue, Dec 31, 2019 at 2:23 AM ghost2303 ***@***.***> wrote: Hi, I know it's been a long time you worked on this code. I use your code, because I want to use an ATMEGA328. I have the following problem: I want to write data to the tag, therefore, I need to authenticate in the first step. As I understood your code, I have to use the command "mfrc522_to_card()" to authenticate and transceive data to/from tags (MIFARE tag). Here's a simplified part how I do it: { // {authentification for key A, authenticate block 8, 6 bytes public key A, 4 bytes UID} uint8_t auth_data[] = {PICC_AUTHENT1A, 0x08, 0xd3, 0xf7, 0xd3, 0xf7, 0xd3, 0xf7, 0xb9, 0xa0, 0xfd, 0xb8}; uint8_t auth_data_len = sizeof(auth_data); // dummy for return data: uint8_t data_return_block[] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; uint32_t* data_return_size = sizeof(data_return_block); // authenticate block: uint8_t ret2 = mfrc522_to_card(MFAuthent_CMD, &auth_data[0], auth_data_len, &data_return_block[0], &data_return_size); } ret2 always returns value of ERROR (0x03). Public key and UID were read out using an app on my smartphone, so they should be ok. Have you ever tried reading, writing, or at least authenticate the tag? Do you remember any issues using this sequence? I would appreciate if you would take some minutes of your time to help me with this issue. Many thanks in advance! BR, Thomas — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#4?email_source=notifications&email_token=ABLQLUVFGKS4CV7XYUFGLHLQ3JKFHA5CNFSM4KBP4EF2YY3PNVWWK3TUL52HS4DFUVEXG43VMWVGG33NNVSW45C7NFSM4IDMZQFQ>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABLQLUVKCTEUOQXCUDTWO6TQ3JKFHANCNFSM4KBP4EFQ> .