Sector 1 has Blocks 4, 5, 6 and 7 and so on and finally Sector 15 has Blocks 60, 61, 62 and 63. Understanding memory Map of MIFARE 1K Tagįor example, Sector 0 has Blocks 0, 1, 2 and 3. A typical MIFARE 1K RFID tag has 1K Byte of memory organized into 16 Sectors (Sector 0 to Sector 15). Next, you can see the actual memory dump of the MIFARE 1K Tag. In this case, the UID is ‘6C 08 88 17’, SAK is ‘08’ and the type of card is MIFARE 1K. After scanning the RFID Card, we get the UID, SAK and Type of RFID tag.
Here, ‘9’ stands for MFRC522 IC and ‘2’ stands for software version 2.0. The first line shows the firmware version of the MFRC522 IC.
The following image is a screen shot of the serial monitor output of ‘DumpInfo’ example.
It is very important to understand the memory layout of the RFID Tag as we will know what is the significance of each memory location, what memory locations are reserved and what locations are free to use for storing user data. If you upload the ‘DumpInfo’ example and open the serial monitor, Arduino will print all the contents of the MIFARE 1K RFID Tag on the serial monitor after scanning it properly.
AccessConditions class also allows the application to set keys A and B, and also to set whether the MAD is in use or not.Ĭopy Code public static AccessConditions GetAccessConditions(Byte data)īitArray byte6 = new BitArray( new Byte ", hexString)) īyte HexAsBytes = new byte įor (int index = 0 index < HexAsBytes.Length index++)
The AccessConditions class exposes a property ( DataAreas) that allows the application to set, for each datablock, the permissions ( Never, KeyA, KeyB, KeyAOrB) for each operation ( Read, Write, Increment, Decrement). To set up sector permissions, the Sector class provides a property named AccessConditions. This method will take care to write on disk only the datablocks that have actually changed. Note that to write back changes on card, call the Flush method. Because GetData do not make copies of internal data, // any changes to the data array is automatically reflected into the sector for ( int i= 0 i The first datablock of sector 0 stores some read-only manufacturer information. The first 32 sectors have 4 datablocks, the remaining 8 have 16 datablocks. The 4K memory card is organized in a similar way. Datablocks in a sector can be read or written only after the application as successfully logged in into the sector with the proper key. Each key can be granted a different set of operations on the datablocks. According to MiFare specifications, two keys exists, named keyA and keyB. The 4 th datablock also stores the access keys. The 4 th datablock stores read and write permissions for each of the remaining 3 datablocks. Each sector is made up of 4 datablocks, and each datablock is 16 bytes in size. The 1K memory card is organized in 16 sectors. This article addresses the so-called MiFare classic, which are shipped in two sizes: 1 kilobytes and 4 kilobytes. There are several flavors of MiFare memory cards.