PN532 read card fail

pylin — Thu, 05 Nov 2020 03:32:14 GMT

I try to use PN532 to read a card, and it fail. Attached is the PN532 driver code and below is the main function code

while (1) { uint8_t success; uint8_t uid[] = {0, 0, 0, 0, 0, 0, 0}; // Buffer to store the returned UID uint8_t uidLength; // Length of the UID (4 or 7 bytes depending on ISO14443A card type) // Wait for an ISO14443A type cards (Mifare, etc.). When one is found // 'uid' will be populated with the UID, and uidLength will indicate // if the uid is 4 bytes (Mifare Classic) or 7 bytes (Mifare Ultralight) success = pn532_readPassiveTargetID(&nfc, PN532_MIFARE_ISO14443A, uid, &uidLength, 0); if (success) { // Display some basic information about the card // ESP_LOGI(TAG, "Found an ISO14443A card"); ESP_LOGI(TAG, "Found an card"); ESP_LOGI(TAG, "UID Length: %d bytes", uidLength); ESP_LOGI(TAG, "UID Value:"); // esp_log_buffer_hexdump_internal(TAG, uid, uidLength, ESP_LOG_INFO); ESP_LOG_BUFFER_HEX_LEVEL(TAG, uid, uidLength, ESP_LOG_INFO); if(uidLength==4) { mifare_classic_handling(); } else if(uidLength==7) { mifare_ultralight_handling(); }else { ESP_LOGE(TAG, "unknown card detected"); } vTaskDelay(1000 / portTICK_RATE_MS); } else { // PN532 probably timed out waiting for a card ESP_LOGI(TAG, "Timed out waiting for a card"); } if(++count>=255) count =0; }

void mifare_classic_handling(void) { uint8_t write_buffer[16]={0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15}; uint8_t read_buffer[16]={0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15}; ESP_LOGI(TAG, "mifare classic"); write_buffer[0]=count; /* ESP_LOGI(TAG, "write test data:"); ESP_LOG_BUFFER_HEX_LEVEL(TAG, write_buffer, 4, ESP_LOG_INFO); if(pn532_mifareclassic_WriteDataBlock(&nfc,0,write_buffer)==1) { ESP_LOGI(TAG, "write test data succeed"); }else ESP_LOGI(TAG, "write test data fail"); */ ESP_LOGI(TAG, "read test data:"); if(pn532_mifareclassic_ReadDataBlock(&nfc,0,read_buffer)==1) { ESP_LOGI(TAG, "read test data succeed"); ESP_LOG_BUFFER_HEX_LEVEL(TAG, read_buffer, 16, ESP_LOG_INFO); }else { ESP_LOGI(TAG, "read test data fail"); } }

The console log output of the firmware is as following when I put a card above the pn532 antenna. It seems that it can read UID of the card. But it cannot read the data of the card. Please comment on this issue

I (32030) APP: Found an card
I (32030) APP: UID Length: 4 bytes
I (32030) APP: UID Value:
I (32030) APP: ba 08 f7 3f
I (32030) APP: mifare classic
I (32030) APP: read test data:
Trying to read 16 bytes from block 0
Unexpected response: 00 ff 03 fd d5 41 13 d7 00 aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa
I (32410) APP: read test data fail

Re: PN532 read card fail

pylin — Mon, 09 Nov 2020 09:50:02 GMT

Add more description:

Inside pn532_mifareclassic_ReadDataBlock() function, it suppose that the 8th byte of PN532_COMMAND_INDATAEXCHANGE command response should be 0x00. However it is not. Therefore, it output error.

Anyone can help in this

Re: PN532 read card fail

stephanie_m — Mon, 09 Nov 2020 18:32:22 GMT

Hello,

It would appear that are either a migration or a custom implementation is this correct?

In this case I would recommend you to check the NFC-FRI SDK (NFC Forum Reference Implementation) and use the examples as a base for you implementation.

Hope this helps

regards,
Estephania

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PN532 read card fail

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