本文已验证成功。
Current Stable Release - OpenWrt 18.06.1，released on August, 18th 2018.
there is also a PandoraBox (http://downloads.openwrt.org.cn/PandoraBox/Xiaomi-Mini-R1CM/stable/)firmware for Xiaomi Mini router. 我们暂时不用这个固件。
前提步骤：
1，保证有外网
2，电脑连上lan口
The next few steps involve first loading the development version of the firmware, 首先需要加载开发版固件
then loading a firmware version which provides SSH access with the last step being loading the OpenWRT firmware onto the router 然后加载提供了ssh的固件，最后要用它去加载openwrt固件。
小米路由器MINI(R1CM) can see this in web, MiWiFi 稳定版 2.22.9
开启小米路由器的SSH功能之后用户可以获得root权限
小结
https://openwrt.org/toh/xiaomi/mini 页面打不开了，最新的不知是不是 https://openwrt.org/toh/xiaomi/miwifi_mini
u盘先格式成fat32，里面不要放任何文件
1，http://www1.miwifi.com/miwifi_download.html
下载开发固件miwifi.bin ，因为稳定版不能刷ssh固件
断开小米路由器的电源，将U盘插入USB接口；
按住reset按钮之后重新接入电源，指示灯变为黄色闪烁状态即可松开reset键；
等待3-5秒安装完成之后，小米路由器会自动重启
U盘记得及时拔出来！！！
2，再格式化下u盘，用手机app连上刷了开发固件的路由器，
http://d.miwifi.com/rom/ssh（或者通过http://www1.miwifi.com/miwifi_open.html的开启ssh工具）下载ssh固件miwifi_ssh.bin
断开小米路由器的电源，将U盘插入USB接口；
按住reset按钮之后重新接入电源，指示灯变为黄色闪烁状态即可松开reset键；
等待3-5秒后安装完成之后，小米路由器会自动重启
wait a while
root@192.168.31.1
U盘记得及时拔出来！！！
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
BusyBox v1.19.4 (2018-06-21 09:07:05 UTC) built-in shell (ash)
Enter 'help' for a list of built-in commands.
-----------------------------------------------------
Welcome to XiaoQiang!
-----------------------------------------------------
$$$$$$\ $$$$$$$\ $$$$$$$$\ $$\ $$\ $$$$$$\ $$\ $$\
$$ __$$\ $$ __$$\ $$ _____| $$ | $$ | $$ __$$\ $$ | $$ |
$$ / $$ |$$ | $$ |$$ | $$ | $$ | $$ / $$ |$$ |$$ /
$$$$$$$$ |$$$$$$$ |$$$$$\ $$ | $$ | $$ | $$ |$$$$$ /
$$ __$$ |$$ __$$< $$ __| $$ | $$ | $$ | $$ |$$ $$<
$$ | $$ |$$ | $$ |$$ | $$ | $$ | $$ | $$ |$$ |\$$\
$$ | $$ |$$ | $$ |$$$$$$$$\ $$$$$$$$$ | $$$$$$ |$$ | \$$\
\__| \__|\__| \__|\________| \_________/ \______/ \__| \__|
are u ok
1
2
uname -a
Linux XiaoQiang 2.6.36 #1 MiWiFi-R1CM-2.21.109 Thu Jun 21 09:31:24 UTC 2018 mips GNU/Linux
最后刷openwrt
Get the latest firmware, eg: # cd /tmp; wget wget http://downloads.openwrt.org/releases/18.06.1/targets/ramips/mt7620/openwrt-18.06.1-ramips-mt7620-miwifi-mini-squashfs-sysupgrade.bin
Check the MTD layout: # cat /proc/mtd If you find a line “OS1” go ahead with flashing:
1
2
3
4
5
6
7
8
# mtd -r write <firmware-image you downloaded> OS1
mtd -r write /tmp/openwrt-18.06.1-ramips-mt7620-miwifi-mini-squashfs-sysupgrade.bin OS1
Unlocking OS1 ...
Writing from /tmp/openwrt-18.06.1-ramips-mt7620-miwifi-mini-squashfs-sysupgrade.bin to OS1 ...
Rebooting ...
After flashing is complete, the router will reboot. When finished you can login using telnet or web-interface on a LAN-connected client（就是pc） to host 192.168.1.1. User: root, no password.
SSH will be enabled after you set a password (using passwd or LuCI web interface), telnet will be disabled.
Please note that the OpenWrt binary defaults to the red color of the led 默认亮红灯是正常的 instead of the orange/blue during and after finishing the boot.
如果ping 不通192.168.1.1 等路由器一直红灯时再重启下即可
参考
http://en.miui.com/thread-64391-1-1.html 已404了
欢迎评论交流
此博客从手机上发布