3

I want to use an android phone as a USB terminal/display for a headless system.

The ideal user experiece would be:

  1. Plug phone to the usb port.
  2. System starts sending status info, phone displays it.

I prefer a solution without developer options/adb necessary.

Ideally the end user only has to install an app and open it up.

Does a solution exist?

  • Maybe via VNC? – Izzy Dec 16 '15 at 0:18
  • Gave it a try. Since the purpose is info display only, having a desktop is a bit of overkill and requires extra scripting to auto-open an info display. Headless system will have no X11 anyway.... Effort for the user to set up a new phone is equal or greater to the partial solution I list below. – hauptmech Dec 16 '15 at 0:59
  • Enabling usb-tethering programmatically seems to be not possible. – hauptmech Dec 16 '15 at 1:03
  • Good points. If the device is rooted, auto-enabling USB tether should not be a big deal for e.g. Tasker with the Secure Settings Plugin, as my Tasker graphs reveal – just a matter of finding the right trigger-acction :) – Izzy Dec 16 '15 at 6:00
  • Rooted devices are not an option. I want to be able to do a sanity check on the headless server using any device at hand. – hauptmech Dec 16 '15 at 12:27
2

My current partial solution:

  1. android: Use usb-tethering to create rndis connection.
  2. headless: bring up network device with a static ip
  3. android: ssh to pc
  4. headless: pipe output to connected pts with write(1)

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