Interesting

[mrpassiontea]

This is an interesting project!

I was trying to see if TMoney offered any APIs to just be able to call and read the card balance. But couldn't find anything available.

From what I understand with this project, you're actually just scanning and reading the data off of the NFC card? When you scan your TMoney card and you look at the data returned from the scan, is it pretty clear which one was the balance or how did you decipher which one was the balance?

Good work!

[happybono]

Hello, @mrpassiontea,

I appreciate your kind words!

As you've mentioned earlier, obtaining technical information about the T-money card reading API wasn’t straightforward. After several days of searching, I stumbled upon a document titled “Financial IC Card Specification Standards,” published by the Financial Informatization Promotion Council. Leveraging the details outlined in this document, I managed to implement some functionality related to card reading.

금융IC카드 표준 - 202112.pdf

However, the document didn’t provide all the necessary information for complete implementation. To enhance inclusivity, I took an extra step by purchasing and testing various types of cards. Despite the efforts, the implementation isn’t yet 100% complete. While cards issued by major domestic prepaid transportation card companies (T-money and Cashbee) are recognized, there remains an issue with third-party cards such as the Rail Plus card issued by KORAIL - not being properly recognized.

Unfortunately, companies beyond the two major credit card providers likely use non-standard decryption methods, which complicates displaying prepaid transit card balances for those cards.

Thank you once again!