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Jakub Vaněk 45b51ebaff mediatek: filogic: add support for Cudy M3000 w/ YT8821 PHY 
The hardware is very close the the Cudy M3000 v1 (see commit
20e4a18feb). However, the Motorcomm YT8821 PHY is tricky
to support because of a MDIO address collision within the router.

Specification:
 - MT7981BA CPU: dual-core ARM Cortex-A53 @ 1.3 GHz
 - 256 MiB RAM
 - 128 MiB SPI NAND
 - Ethernet:
   - 1x 1GbE LAN port driven by the internal MT7981 PHY
   - 1x 2.5GbE WAN port driven by the Motorcomm YT8821
 - WiFi:
   - MT7981BA 2.4 GHz WiFi with 2x2:2 MIMO
   - MT7981BA 5 GHz WiFi with 2x3:2 MIMO
 - Buttons: Reset, WPS
 - LED: 1x combined red/white

How to know if you have the a router with the YT8821 PHY:
 - Boot the router into the vendor's firmware. Go to Diagnostic Tools
   -> System Log. Try searching for "rtl8221b".
 - If there are some matches, you have the Cudy M3000 router with
   the Realtek PHY and you should NOT use the device defined in this
   commit. Instead, you should use the device defined in
   mt7981b-cudy-m3000-v1.dts.
 - If there are no matches, try searching for "yt8821". If that
   matches something, you have the Cudy M3000 with the Motorcomm PHY
   and you should use this device tree
   (mt7981b-cudy-m3000-v2-yt8821.dts).
 - If even the yt8821 string did not match anything, then something
   is wrong. Rebooting the router might help (the system log would
   be refreshed).

Installation via the Cudy web UI:
 - Download the signed intermediary firmware from
   https://drive.google.com/drive/folders/1BKVarlwlNxf7uJUtRhuMGUqeCa5KpMnj
 - Flash the intermediary firmware using the Cudy web UI
 - Connect a PC/laptop to the "1Gbps LAN" port
 - Open http://192.168.1.1 in your browser, log in
   (the password should be empty)
 - Flash your desired OpenWrt firmware via LuCI
 - The router should reboot into the desired firmware

How to access UART (citing from 20e4a18feb):
 - remove rubber ring on the bottom
 - remove screws
 - pull up the cylinder, maybe help by push on an ethernet socket
   with a screwdriver
 - remove the (3) screws holding the board in the frame
 - remove the board from the frame to get to the screws for the
   silver, flat heat shield
 - remove the (3) screws holding the heat shield
 - solder UART pins to the back of the board
   - make sure to have the pins point out on side with the black,
     finned heat spread
   - the markings for the pins are going to be below the silver heat
     shield
   - Vcc is not needed
 - the UART parameters are 115200 baud, 8n1

Installation via UART (citing from 20e4a18feb):
 - attach an Ethernet cable to the "1Gbps LAN" port on the router
 - hold the reset button while powering the router
 - press CTRL-C or wait for the timeout to get to the U-Boot prompt
 - prepare a TFTP server on the network to supply ..-initramfs-kernel.bin
 - use 'tftpboot 0x46000000 ..-initramfs-kernel.bin' in the U-Boot
   shell to pull the image (change the file name accordingly)
 - boot the image using 'bootm 0x46000000'
 - push the ..-sysupgrade to the router using your preferred method
 - perform the upgrade with 'sysupgrade -n'

Signed-off-by: Jakub Vaněk <linuxtardis@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/22259
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
2026-03-14 01:40:32 +01:00
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package procd: update to git HEAD 2026-03-13 23:16:28 +00:00
scripts build: reject non-matching artifacts 2026-03-12 09:31:25 +01:00
target mediatek: filogic: add support for Cudy M3000 w/ YT8821 PHY 2026-03-14 01:40:32 +01:00
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README.md

OpenWrt logo

OpenWrt Project is a Linux operating system targeting embedded devices. Instead of trying to create a single, static firmware, OpenWrt provides a fully writable filesystem with package management. This frees you from the application selection and configuration provided by the vendor and allows you to customize the device through the use of packages to suit any application. For developers, OpenWrt is the framework to build an application without having to build a complete firmware around it; for users this means the ability for full customization, to use the device in ways never envisioned.

Sunshine!

Download

Built firmware images are available for many architectures and come with a package selection to be used as WiFi home router. To quickly find a factory image usable to migrate from a vendor stock firmware to OpenWrt, try the Firmware Selector.

If your device is supported, please follow the Info link to see install instructions or consult the support resources listed below.

An advanced user may require additional or specific package. (Toolchain, SDK, ...) For everything else than simple firmware download, try the wiki download page:

Development

To build your own firmware you need a GNU/Linux, BSD or macOS system (case sensitive filesystem required). Cygwin is unsupported because of the lack of a case sensitive file system.

Requirements

You need the following tools to compile OpenWrt, the package names vary between distributions. A complete list with distribution specific packages is found in the Build System Setup documentation.

binutils bzip2 diff find flex gawk gcc-6+ getopt grep install libc-dev libz-dev
make4.1+ perl python3.7+ rsync subversion unzip which

Quickstart

  1. Run ./scripts/feeds update -a to obtain all the latest package definitions defined in feeds.conf / feeds.conf.default

  2. Run ./scripts/feeds install -a to install symlinks for all obtained packages into package/feeds/

  3. Run make menuconfig to select your preferred configuration for the toolchain, target system & firmware packages.

  4. Run make to build your firmware. This will download all sources, build the cross-compile toolchain and then cross-compile the GNU/Linux kernel & all chosen applications for your target system.

Related Repositories

The main repository uses multiple sub-repositories to manage packages of different categories. All packages are installed via the OpenWrt package manager called opkg. If you're looking to develop the web interface or port packages to OpenWrt, please find the fitting repository below.

  • LuCI Web Interface: Modern and modular interface to control the device via a web browser.

  • OpenWrt Packages: Community repository of ported packages.

  • OpenWrt Routing: Packages specifically focused on (mesh) routing.

  • OpenWrt Video: Packages specifically focused on display servers and clients (Xorg and Wayland).

Support Information

For a list of supported devices see the OpenWrt Hardware Database

Documentation

Support Community

  • Forum: For usage, projects, discussions and hardware advise.
  • Support Chat: Channel #openwrt on oftc.net.

Developer Community

License

OpenWrt is licensed under GPL-2.0