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Kamil Jońca 1c62e21a8d ramips: mt76x8: add support for Cudy LT400E v1 
This commit adds support for the Cudy LT400E v1,
an indoor 4G/LTE WiFi router.
It has 4x10/100 Mbps Ethernet ports, a 2.4 GHz radio,
and a Quectel 4G/LTE EC200A modem.

Hardware:

SoC: MediaTek MT7628NN
Flash: 8 MiB SPI
RAM: 64 MiB
Ethernet: 4x10/100 Mbps
WiFi: 2.4 GHz (embedded MT7628, 802.11n)
WWAN: Quectel EC200A-EL 4G/LTE Cat 4 modem
SIM: nano-SIM slot
Buttons: 1 Reset button, 1 WPS button
LEDs: 10x (blue)
Power: 12 V DC barrel jack

Installation:
The stock firmware is a customized variant of OpenWrt, which implements
a signature check that only allows flashing official firmware. Cudy
offers, on their website [1][6], intermediate OpenWrt firmware images
which do not implement the signature check. After flashing the
intermediate image, the upstream (i.e., official) OpenWrt image can be
installed.  See the device's entry in OpenWrt's Wiki for more details [2].

Cellular network:
The Quectel EC200A modem is internally connected to the SoC via USB, and
operates in ECM mode, supported by the CDC Ether driver [3]. When
inserting a SIM card in the slot, if no PIN is needed, the network
interface "usb0" is brought up and the cellular connection works out of
the box. To interact with the modem directly (unlock the PIN, change APN
and PDP settings, etc.), AT commands can be sent with picocom to serial
port /dev/ttyUSB2 [4].

Recovery:
The stock firmware can be recovered via TFTP, as the bootloader (based
on U-Boot) implements a recovery client. Set up a TFTP server on your
computer with IP 192.168.88.1/24 serving the stock firmware from Cudy's
website renamed to "recovery.bin". Press the Reset button (keep it
pressed), power on the device, wait for the TFTP server to send the
recovery.bin file, then release the Reset button. The router will take a
couple of minutes to reboot and set up the stock firmware. See the
device's entry in OpenWrt's Wiki for more details [2].

Discussion:
Use the dedicated thread in OpenWrt's forum to discuss any aspects [5].

Acknowledgments:
The code to support this device is largely based on the sources kindly
provided by Cudy in compliance with the GPL license. Thanks for
supporting the OpenWrt community.

Links:
[1] https://www.cudy.com/blogs/faq/openwrt-software-download
[2] https://openwrt.org/toh/cudy/lt400e_v1
[3] https://openwrt.org/docs/guide-user/network/wan/wwan/ethernetoverusb_cdc
[4] https://openwrt.org/docs/guide-user/network/wan/wwan/at_commands
[5] https://forum.openwrt.org/t/242466
[6] https://drive.google.com/drive/folders/1BKVarlwlNxf7uJUtRhuMGUqeCa5KpMnj

Co-authored-by: rogerpueyo <roger.pueyo@guifi.net>

Signed-off-by: Kamil Jońca <kjonca@onet.pl>
Link: https://github.com/openwrt/openwrt/pull/21246
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
2026-01-20 01:47:00 +01:00
.devcontainer/ci-env devcontainer: Add development environment for gihub codespace 2023-10-30 23:34:26 +01:00
.github ci: rework and move build-on-comment action 2026-01-16 18:42:20 +07:00
.vscode meta: VS Code: add "Git: Always Sign Off" setting 2024-10-03 17:18:51 +02:00
config microchipsw: lan969x: add Microchip EV23X71A 2025-12-03 12:13:17 +01:00
include build: add default priority to ABI-versioned packages 2026-01-12 14:28:52 +01:00
LICENSES LICENSES: include all used licenses in LICENSES directory 2021-02-14 19:21:38 +01:00
package ucode: enable ucode-mod-zlib 2026-01-19 21:21:17 +01:00
scripts projectsmirrors: switch to HTTPS 2026-01-10 19:52:23 +01:00
target ramips: mt76x8: add support for Cudy LT400E v1 2026-01-20 01:47:00 +01:00
toolchain toolchain: glibc: Update glibc 2.41 to recent HEAD 2025-11-30 19:14:52 +01:00
tools tools/squashfs4: fix rare data corruption issue 2026-01-09 13:50:38 +01:00
.gitattributes gitattributes: automatically convert dts file CRLF line endings to LF 2025-11-29 17:52:35 +01:00
.gitignore gitignore: ignore local APK keys 2024-05-17 22:03:06 +03:00
BSDmakefile
Config.in build: scripts/config - update to kconfig-v5.14 2022-02-19 13:10:01 +01:00
COPYING COPYING: add COPYING file to specify project licenses 2021-02-14 19:21:38 +01:00
feeds.conf.default feeds: revert to git.openwrt.org 2026-01-09 21:55:00 +01:00
Makefile build: include tests/Makefile if available 2024-06-17 17:51:31 +02:00
README.md README: replace "MacOSX" with "macOS" 2024-04-01 18:46:30 +02:00
rules.mk rules.mk: add DEPRECATION NOTICE for AUTORELEASE 2025-10-29 21:09:57 +01:00

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