W!K!

The Magic Mifare Classic 1K card has not only changeable UID but also full backer door command support. When we write error data to the magic card cards, they also can be no response or dead. Here's the tutorial to fix the Magic Mifare Classic Card.

Depending on the Firebase of MTools, only 15% of MTools users have used Sniffer functions of MTools. It's really a easy tools for comparison and analysing. In this article, I'll show the tutorial of how to use Sniffer in MTools.

PN532作为史上最低成本RFID的硬件设备，是无法直接上电工作的，它需要在串口通信下传递数据，因此需要串口模块，那么所有串口通信的模块理论上都支持的，本文里接招制作一个带有USB串口和蓝牙串口的一体式PN532。

CRC - Cyclic Redundancy Check is widely used in data transition. According to wikipedia.org, A CRC-enabled device calculates a short, fixed-length binary sequence, known as the check value or CRC, for each block of data to be sent or stored and appends it to the data, forming a codeword.

The last post shows how to use MTools to read money data on Sector 3.
Here's the tutorial to show how to charge mifare 1k card with regular rule on 2 blocks.

NFC has been widely used on Android Pay, Apple Pay and Device Connection.
With NFC on Android Phone, it's even easy to read datas in the mifare card, such as Metro Card, RFID Parking card and etc.
This article shows how to use NFC as a mifare reader to read the amount remaining in the card.