1. 下载地址
http://downloads.openwrt.org.cn/PandoraBox/Xiaomi-Mini-R1CM/stable/PandoraBox-ralink-mt7620-xiaomi-mini-squashfs-sysupgrade-r512-20150309.bin

2.通过SSH 登录小米
mtd -r write /tmp/xxx.bin firmware
这个命令最后的firmware改成OS1
mtd -r write /tmp/xxx.bin OS1