Control Panel (LuCI)

Control Panel (LuCI)

In one sentence: on OpenWrt you manage the device from a web page; the openwrt-luci system adds the MU300 control panel, a dashboard for the 5G modem, SIM, SMS and battery.

The simple version: LuCI is the router settings page you may know from home routers. The MU300 panel is an extra set of pages made for this device: how strong the signal is, which bands it uses, your text messages, the battery.

Open it

In a browser on a computer or phone connected to the device (USB or its Wi-Fi):

• F50 / MU300: http://192.168.77.1
• U30 Air: http://192.168.78.1

Log in as root with the password you chose at install.

Plain OpenWrt vs. the control panel

	OpenWrt (openwrt)	OpenWrt with the panel (openwrt-luci)
LuCI (network, wireless, firewall, packages)	yes	yes
MU300 pages (dashboard, Cellular, VPN, Power, CPU, Languages, Packages, Terminal)	-	yes
Theme	LuCI's default	Aurora (Bootstrap stays installed)
IPv6 from the carrier	prefix extension	relayed (router advertisements and NAT66)
Magisk zip	yes	yes (since v2026.10.18)

Pick it at install ("Which OpenWrt?" -> 2, or MU300_OPENWRT=luci), or switch an installed device with sudo mu300-os openwrt-luci and reboot (the system must be installed).

The panel's pages

• Status dashboard: live radio readings (signal, bands, cells, temperatures), the operator's name, the mobile data state and the current download and upload speed, every second; the Wi-Fi clients with their speeds, connected time, name and address; the carrier's DNS servers and the number of connections; on the U30 Air also the battery: level, whether it charges, and the power in watts. While the modem is busy the page keeps its last readings and says how old they are. The home page also has Switch to Android and Lock Linux (see Going Back to Android).
• Cellular > Network locks: network mode, band, cell and EN-DC locks that persist across reboots and are replayed at boot. Reset all to automatic clears them. Locks live in the modem, so they also apply in Android.
• Cellular > SMS: read, send and delete messages (see SMS for the one rule to remember).
• Cellular > SMS forwarding: pass incoming messages on to a webhook, a Telegram chat or another phone (see SMS).
• Cellular > Data usage: mobile data per day and per billing cycle, with a reset day and a monthly cap (mu300-traffic, see Mobile Data and APN).
• Cellular > AT terminal: guarded AT commands over the same channel the system uses. A command that scans, changes the radio, the APN or the SIM, or writes a setting that persists into Android, is explained first and sent only after a click; a network scan runs in the background and the page follows it.
• VPN (a menu of its own, with the VPN module v2): Overview (state, active profile, engine, tunnel, uptime, live rates, the exit IP behind a button, Start/Stop/Restart, the kill switch and IPv6 behind a confirmation), Profiles (add from a share link, pasted text, a file or a URL; test the latency; rename, show and edit the config, delete), Subscriptions (a URL that yields profiles, refreshed by hand or every 6 to 168 hours), Engines (Xray, sing-box, mihomo, dae: install, update, remove; online or from an uploaded tarball checked against the module's release), Settings (kill switch, IPv6, LAN ranges that bypass the tunnel, Tailscale, DNS, the per-profile options) and Logs. Without the module every page offers to install it.
• Cellular > TTL: a fixed TTL for mobile data (mu300-ttl).
• Cellular > Device management: USB role (device or host), the USB network mode (NCM, ECM or RNDIS, applied at the next boot), and host-mode adapters that can join the LAN bridge.
• Cellular > Adapter settings: how the panel reaches the modem (AT backend, serial port, custom adapter).
• System > Languages: interface language, and the lang extra.
• System > Power: the active power profile and why (in your language), battery, power source and the charger's input current, the idle settings of the three profiles, the saver threshold and the charge limit (0-100 %, U30 Air).
• System > CPU: the CPU profile: saving, balanced (the default) or performance (mu300-cpu). It never touches the voltage, and the thermal protection stays in charge in every profile. Below it, read only, the kernel's thermal zones: temperatures, trip points and the cooling devices bound to them with their current state (on the mainline kernels the stock soc-thmzone, 70/85 °C passive and 110 °C critical, throttles the three clusters at 85 °C).
• System > Packages after an update: the packages you had installed yourself and what the update did with them (see Updating).
• System > Terminal: a root shell in the browser (ttyd). It listens on the LAN address only (port 7681; the cellular side never reaches it) and opens a shell only for a one-time token the page gets for your logged-in panel session, so there is no second password to guess. It closes after 15 minutes without activity (uci set ttyd.mu300.idle=<seconds>; 0 never). A panel opened over https opens it in a tab of its own. Terminal settings is ttyd's own page; enable 0 there removes the terminal.

Since v2026.10.20 one stuck AT command no longer takes the panel down: every modem read has a deadline, the pages send their calls one at a time and back off after failures, and the Device page keeps a log of the panel's recent modem operations (names and timings only). On OpenWrt an AT command takes about 0.13 s instead of a full second.

A web panel on Ubuntu (Cockpit)

Ubuntu has no LuCI, but it can have Cockpit, Ubuntu's own web console (terminal, logs, services, networking, storage, accounts), with an MU300 page: the mobile network (operator, technology, registration, signal), mobile data on/off, data usage and live rates, battery and temperatures, SMS, the VPN (on/off, profiles), the CPU profile and power state, the hotspot's name and password, joining a Wi-Fi network, and updates. Network locks stay a feature of the OpenWrt panel.

sudo mu300-extra install panel                                           # Cockpit from Ubuntu's archive (about 12 MB)
sudo mu300-extra install panel --from mu300-extra-panel-offline.tar.gz   # offline: the release's file, Cockpit inside
sudo mu300-extra remove panel

The installer asks about it too (default no). Then open https://192.168.77.1:9090 (U30 Air: .78.1), accept Cockpit's own certificate and log in as ubuntu; "Turn on administrative access" for the pages that need root. Cockpit listens on the LAN only (USB and the hotspot), the firewall closes it to the cellular side anyway, root cannot log in, and a session ends after 15 minutes idle. In English, Turkish and Chinese.

Languages

Both OpenWrt systems speak English, Turkish and Simplified Chinese out of the box. The interface starts in English: switch under System -> System -> Language and Style, or on openwrt-luci under System -> Languages. An update keeps your choice.

The lang extra (about 2 MB) adds LuCI in 40 more languages and the panel in 29 of them:

mu300-extra install lang                                               # from the release of this system
MU300_EXTRA_FILE=/tmp/mu300-extra-lang.tar.gz mu300-extra install lang  # from a file, offline
mu300-extra lang                                                       # which languages are offered
mu300-extra remove lang

The panel's translations other than Turkish and Chinese are machine (AI) translations; corrections are welcome (see Contributing).

Credits

The panel is the work of kanoqwq (kanoqwq/mu300-linux, branch clean-tf-7.2), ported here with the translations rewritten as standard LuCI catalogs. The theme is Aurora by eamonxg. The app's own notes: openwrt/luci-app-mu300/README.md.

OpenWrt reminders

• Never sysupgrade or flash OpenWrt firmware images.
• apk upgrade is fine, except the kernel and kmod-* packages.
• On kernel 5.4, a firewall change saved in LuCI may need nft delete flowtable inet fw4 ft; fw4 reload (or a reboot) on older releases; v2026.10.17 fixed fw4 reload/restart with flow offloading on 5.4.