Donnerstag, 7. Februar 2013

7. Inside the RadioCard

Now I've wired my board. As you can see, it was really no big deal. Not pretty, but functional. For additional plug the hole grid is perfect to use.

Unfortunately, blurred

Now quickly connected to the Arduino and let's go for the first test. I have previously downloaded the files from github and put the files in the folder C: \ arduino \ arduino-1.0.3 \ libraries . I want to show me a hex dump of the 1K memory on the card. Therefore I loaded the sketch mifareclassic_memdump.pde to the Arduino. Our RadioCard placed near the RFID-board and already the Arduino starts working!

My RFID board lives!
The Serial Monitor shows the following result:

This looks very good! All HEX values ​​:-( . But I was longing for decimal numbers. But step by step. My Mifare S50 card has a 1K memory and is divided into 16 sectors (0-15) Each sector. has 4 blocks of 16 bytes (0-15). If we calculate:

16 sectors * 4 blocks * 16 bytes = 1024 bytes = 1KByte
In the picture above I only displayed the first four sectors, the remaining 12 blocks look the same - promised! The sector "0" is a special one. it containes the block "0", which belongs to the manufacturer. The first four bytes of the UID (here: FE 48 98 D1) followed by the checksum (here: FF). This is exactly the information that needs to be tinkered it to my playlist number. If I convert the hex values ​​FF FE 48 98 D1 to decimal values, I get:

254 72 152 209 255  ... and that is very familiar to me! The Radio Card !