openwrt-redmi-ax3000

Openwrt for Redmi AX3000 / Xiaomi CR880x / Xiaomi CR881x

!!! NOTE: This is the main development branch which using mainline Linux LTS 5.4 !!!

If you need more stable versions, please checkout the following branches which using QSDK kernel

• ipq50xx-qsdk-kernel-5.4-openwrt-21.02-qsdk-11.5.05.841.1029
• ipq50xx-qsdk-kernel-4.4-openwrt-21.02-qsdk-11.4.0.5.7418

Device	Boot	Switch	CPU Ethernet	NSS NAT	2.4G WiFi	5G WiFi
Xiaomi CR880x (M79 version)	✔️	✔️	✔️	❌	✔️	✔️¹
Redmi AX3000 Xiaomi CR880x (M81 version)	✔️	✔️	✔️	❌	✔️	✔️¹
Xiaomi CR881x	✔️	✔️	✔️	❌	✔️	✔️¹
CMCC RAX3000Q	⚠️ No test ⚠️

NOTE¹: For 160MHz, Country Code, Width and Channel need to be set correctly. And wait 1 minute for radar detection, then the WiFi will be appeareed.

uci -q batch <<-EOF
	wireless.radio1.country='CN'
	wireless.radio1.htmode='HE160'
	wireless.radio1.channel='64'
EOF

How to build

OS: Ubuntu 20.04 (focal)

# Install dependencies
sudo apt update
sudo apt install build-essential clang flex g++ gawk gcc-multilib gettext \
  git libncurses5-dev libssl-dev python3-distutils rsync unzip zlib1g-dev

# Clone this repo
git clone https://github.com/hzyitc/openwrt-redmi-ax3000
cd openwrt-redmi-ax3000

# Update and install feeds
./scripts/feeds update -a
./scripts/feeds install -a

# Configure
make menuconfig

# Download
make -j16 download

# Build
make -j$(nproc)

How to install

Get UART access

Input from UART will be allowed after a successful TFTP recovery.

1. Connect UART and LAN.

2. Download the vendor firmware:

   Offical website: https://www.miwifi.com/miwifi_download.html

   Device	URL
   Redmi AX3000 |	https://cdn.cnbj1.fds.api.mi-img.com/xiaoqiang/rom/ra81/miwifi_ra81_firmware_1dd69c_1.0.33.bin |
   Xiaomi CR8806 |	https://cdn.cnbj1.fds.api.mi-img.com/xiaoqiang/rom/cr8806/miwifi_cr8806_firmware_fe70b_6.2.14.bin |
   Xiaomi CR8808 |	https://cdn.cnbj1.fds.api.mi-img.com/xiaoqiang/rom/cr8808/miwifi_cr8808_firmware_9d216_6.2.11.bin |
   Xiaomi CR8809 |	https://cdn.cnbj1.fds.api.mi-img.com/xiaoqiang/rom/cr8809/miwifi_cr8809_firmware_b814a_6.2.102.bin |

3. Use MIWIFIRepairTool to recover the device's firmware.

   Offical tutorial: https://www.xiaomi.cn/post/19134127

   This tool simply does TFTP recovery. You can use other DHCP and TFTP server as well.

   Here are some useful links:

   https://forum.openwrt.org/t/adding-openwrt-support-for-xiaomi-redmi-router-ax6s-xiaomi-router-ax3200/111085/513

   https://github.com/mikeeq/xiaomi_ax3200_openwrt#uart-flash

   https://openwrt.org/inbox/toh/xiaomi/xiaomi_ax3600#tftp_recovery

4. Hold the reset button and reboot the router until the system LED blink.

5. Wait until the firmware being flashed.

6. Unplug then plug back in the power.

7. Send any key stroke to UART to interrupt the U-boot.

8. Run the following command inside U-boot:

   setenv boot_wait on
   setenv uart_en 1
   saveenv
   

Now we have enabled UART.

Flash Openwrt

a. Use U-boot to flash

Download openwrt-ipq50xx-arm-redmi_ax3000-squashfs-nand-factory.ubi and put it into TFTP root.

Then run the following command inside U-boot:

# This router ip
setenv ipaddr 192.168.1.2
# TFTP server ip
setenv serverip 192.168.1.1

# Download the firmware to the RAM
tftpboot openwrt-ipq50xx-arm-redmi_ax3000-squashfs-nand-factory.ubi

# Flash it as system 2
flash rootfs_1
setenv flag_try_sys2_failed 0
setenv flag_boot_rootfs 1
setenv flag_last_success 1
saveenv

# Flash it as system 1
# flash rootfs
# setenv flag_try_sys1_failed 0
# setenv flag_boot_rootfs 0
# setenv flag_last_success 0
# saveenv

# Reboot
reset

b. Use miwifi (the vendor firmware) to flash

cd /tmp
wget https://github.com/hzyitc/openwrt-redmi-ax3000/releases/latest/download/openwrt-ipq50xx-arm-redmi_ax3000-squashfs-nand-factory.ubi

# Check your partition table
# cat /proc/mtd
[[ "$(grep '"rootfs"' /proc/mtd | cut -d':' -f1)" == "mtd18" ]] || exit
[[ "$(grep '"rootfs_1"' /proc/mtd | cut -d':' -f1)" == "mtd19" ]] || exit

# Detect the current system slot and flash into the other one
# cat /proc/cmdline
mtd="$(grep -oE 'ubi.mtd=[a-zA-Z0-9\-\_]*' /proc/cmdline | cut -d'=' -f2)"
if [[ "$mtd" == "rootfs" ]]; then
	# Flash it as system 2
	ubiformat /dev/mtd19 -f openwrt-ipq50xx-arm-redmi_ax3000-squashfs-nand-factory.ubi
	nvram set flag_try_sys2_failed=0
	nvram set flag_boot_rootfs=1
	nvram set flag_last_success=1
	nvram commit
elif [[ "$mtd" == "rootfs_1" ]]; then
	# Flash it as system 1
	ubiformat /dev/mtd18 -f openwrt-ipq50xx-arm-redmi_ax3000-squashfs-nand-factory.ubi
	nvram set flag_try_sys1_failed=0
	nvram set flag_boot_rootfs=0
	nvram set flag_last_success=0
	nvram commit
fi

# Reboot
reboot

Related links

openwrt/openwrt - Openwrt official repository

qsdk - QSDK official repository

quic/qca-sdk-nss-fw - NSS firmware

quic/upstream-wifi-fw - WiFi firmware

qca/qca-swiss-army-knife - BDF tools

Telecominfraproject/wlan-ap - another Openwrt which support ipq50xx