Step-by-step guide on how to use Mifare Classic Card Programming Software for ACR1252U
✅ Step 1: Connect Your Smart Card Reader
Install ACS ACR1252U NFC Reader SDK v2.00.
Ensure your RFID reader (e.g., ACR1252U or similar) is physically connected to your PC.
Use a USB port and make sure it is properly seated.
If using a new reader, install the correct drivers (often found on the manufacturer's website).
✅ Step 2: Initialize the Reader
Once the reader is connected and detected, it should appear in the "Select Reader" dropdown.
Select the reader from the dropdown list.
Click the "Initialize" button to start communication with the reader.
✅ Step 3: Load Keys for Authentication
Insert your Mifare Classic card onto the reader.
If your card is protected, you’ll need the appropriate authentication key (
Key AorKey B).Enter the Key Store Number "00" and Key Value (typically
FFFFFFFFFFFFfor default cards). see Figure 2 belowClick "Load Key".
✅ Step 4: Authenticate a Block
Choose Key A or Key B under Authentication Function.
Specify the Block No (in decimal) you want to access. see Figure 2 below
Enter the Key Store Number "00" that matches the one you used when loading the key. see Figure 2 below
Click "Authenticate".
✅ Step 5: Read/Write to the Card
Use the Binary Block Functions to read or write text data to the card.
Specify the Start Block and Length "16 characters MAX" .
For writing: type data in Data (Text), then click "Update Block".
For reading: click "Read Block".
Use Value Block Functions if you're handling value-based operations (like balance).
🚫 DO NOT WRITE TO THESE BLOCKS:
Block 3 of each sector — these contain Key A, Key B, and access bits.
Writing here can lock your card permanently if you don’t understand access bits structure.