Device Manager

Device Manager

In one sentence: with the device running MU300 Linux and plugged into a computer, open the web installer in Chrome or Edge, click Connect, and you can change the device's Wi-Fi, mobile data, VPN, SMS, LAN and system settings from the browser.

The simple version: the page is a remote control that talks to the device over the USB cable. The device keeps the buttons' rules itself: it checks everything the page asks for, and it never hands a password back.

Not tested on a device yet. The manager is new (FINDINGS 110): its device side and the page are covered by tests, but nobody has run it on an F50 or a U30 Air so far. If something looks wrong, save the log (the page can) and tell us. LuCI (OpenWrt) and the Cockpit panel (Ubuntu) keep working as before.

What you need

• A device that runs MU300 Linux from a release with the manager. On an older release the page shows a small view (updates, kernel, restart) and says to update: Update now there, restart, connect again.
• adb on, which it is by default (Installation: "adb to Linux").
• Chrome or Edge on a computer (WebUSB). No adb server running on the computer (adb kill-server).

What is in it

Tab	What you can do
Overview	system, release, kernel, uptime, signal and operator, data used this cycle, battery (U30 Air), temperatures, storage
Wi-Fi	the hotspot's name, password, band and channel, hide the name, on/off, the connected devices; join another Wi-Fi network as the internet connection
Mobile data	on/off, APN with user name and password, IP type, which SIM, band and cell locks (OpenWrt with the control panel)
VPN	install the VPN module; profiles (from a share link, a pasted config, a file or an https address), use, rename, remove; on/off, kill switch, IPv6, subscriptions, engines, the exit address, the log
SMS	read, send and delete messages; the forwarding summary (OpenWrt with the control panel)
USB and LAN	the LAN address, the U30 Air's USB host mode, whom adb lets in
System	device name, time zone, the login password, SSH, restart, what starts next, updates, kernel, extras, logs, a diagnostics file

Good to know

• Passwords go one way. The hotspot's, the APN's and the login password, VPN links and subscription addresses are sent to the device and never shown again; a password field starts empty and means "unchanged". Tick show to see what you are typing.
• The page tells you before it cuts its own connection. Making the U30 Air's USB port a host, changing whom adb lets in, and a restart end the connection; the page says how to get back first. Changing the LAN address, the hotspot or mobile data does not touch the USB connection.
• Long work runs on the device. An update, a kernel switch, installing an extra or the VPN module, joining a Wi-Fi network: closing the page or pulling the cable does not stop it. Connect again and the page shows where it is.
• adb "Keys only" adds this browser's key first, so the page keeps working. If you later clear the site's data in the browser, the key is gone: run sudo mu300-usb adb auth open over SSH to get back in.
• WPA3 is not offered: it is disabled on this Wi-Fi chip for security, the hotspot is WPA2-PSK only. A hotspot still set to WPA3 is switched to WPA2 with its password when you save (Wi-Fi Hotspot and Client).

For programs: the device side is mu300-api, documented in docs/ADB-INTERFACE.md.