Xiaomi Mi router 4 (MI-4 / R4) Padavan firmware support

[minax007]

Dear @hanwckf

I would like to share with you the config files for the Mi-4 router (https://www.mi.com//miwifi4): configs.zip

This router is a different model than the Xiaomi router 4A or 4C.

The Mi-4 has almost the same system architecture as the Mi-R3G, which you are already supporting in your repository:

CPU: MediaTek MT7621A (880 MHz, 4 cores)
FLASH: 128 MiB (ESMT F59L1G81MA)
RAM: 128 MiB (ESMT M15T1G1664A)
2,4 GHz WiFi: MediaTek MT7603EN
5,0 GHz WiFi: MediaTek MT7612EN

The differences to Mi-R3G are:

RAM size: 128 MB instead of 256 MB
GPIO: Mi-Net button
LAN1/LAN2/WAN port assignments
No USB port

I have identified that following port assignments lead to a correct indication, which can be checked here: http://my.router/Advanced_Switch_Content.asp

_CONFIG_RAETH_ESW_PORT_WAN=4 CONFIG_RAETH_ESW_PORT_LAN1=2 CONFIG_RAETH_ESW_PORT_LAN2=1 CONFIG_RAETH_ESW_PORT_LAN3=3 CONFIG_RAETH_ESW_PORTLAN4=0

I would appreciate if you would support this router in your repository.

---

Dear Padavan users,

I would appreciate if anyone who has this router would test the functionality.

You can easily get Telnet-access to the Mi-4 router by this exploit: https://github.com/acecilia/OpenWRTInvasion Video: https://www.youtube.com/watch?v=VxzEvdDWU_s

The easiest way to install Padavan on this router is via BREED. Download link: https://breed.hackpascal.net/breed-mt7621-xiaomi-r3g.bin

Upload it via Filezilla in a Telnet session into the /tmp-folder of the router.

Then start terminal and install BREED: telnet 192.168.1.1 Telnet user: root Password: none (just hit enter) mtd -e Bootloader -r write /tmp/breed-mt7621-xiaomi-r3g.bin Bootloader

With BREED you can easily install the firmware.

Either you compile the TRX-firmware-file by your own with the config files, which are posted above.

Or you install the precompiled TRX-file found in the releases section of the link below: https://github.com/minax007/XIAOMI_MI-4_Padavan

The releases on this site include the minimum feature set. In case you need more features just fork the repository and change the CI.yml file according to your needs.

[minax007]

If anyone wants to do a code review please compare the configuration files of the Mi-4 with the configuration files of the Mi-R3G as I have used those as a baseline.

[minax007]

Dear @hanwckf I have created a pull request and have aligned the userspace configuration settings (=y/=n) as they are for the other routers in your repository.

[minax007]

In case anyone wants to test the full feature set with English language support ... here is the build:

MI-4_20210613_7019d3e.trx.zip

Please unzip before installing.

[minax007]

Dear @hanwckf thank you very much for accepting my pull request +1