nRF Connect下载及使用教程

[nRF connect软件下载链接](https://cdn.openluat-luatcommunity.openluat.com/attachment/20200829112822351_no.nordicsemi.android.mcp.apk ) [nRF connect使用教程下载链接](https://cdn.openluat-luatcommunity.openluat.com/attachment/20211102112119070_nrfConnect.pdf)