TI中文支持网Hi，我想请问下在协议栈中，如何使终端直接加入网络，实现扫描二维码入网？
Alvin Chen：
想要实现安全性的二维码入网，你可以使用install code的入网方式,具体可以见 the Base Device Behavior v1.0 specification。 Install Codes Install codes are 128 bits of random data + 16 bit CRC, which are passed through an MMO hash function to generate a TC Link Key Install codes example: a manufacturer gives a joining device a pre-configured TC link key derived from an install code and ships the device with a hard copy of the install code, which is manually entered into the Trust Center along with the IEEE address of the joining device, via some kind of out-of-band method (for example, a gateway w/ UI, a scanner for a QR code, etc). This derived key is now used as "Link Key A" (see flow chart to the right) instead of the well-known TC Link key, thus no well-known key is ever used to encrypt data over-the-air.
