SOURCEFORGE » RALF » 2015 Satellite emergency small terminal

h1. Usage test

h2. Standalone test

The microbox does not need an internet access to work. The information backbone will be unavailable, but we'll still operate in degraded mode.

This test was the first we made and shown no problem, but in order for it to be successful, we needed to tweak a bit th raspi configuration, that way we can plug a screen using HDMI connexion, plus keyboard an mouse.

The main changes we needed to do was to enable the HDMI video output using hot-plugged screens, otherwise the screen does not light up at all. Second was that fact that the Raspbian image was only 2GB big once extracted

on the 32GB SD card. (the rest was left with no partition), so we needed to expand the filesystem to fill up the entire memory.

One thing we remarked during those tests is that usually, a raspi enable its GPIO to provide a TTL link. This TTL link give access to a shell on the raspi. We tried to use this shell to reconfigure correctly the raspi 

(as neither the HDMI screen, nor the touch-screen nor SSH access was working), but we were unable to get any TTL link from those pins. We haven't dig further the issue, but it sure is one if one day it's the only option

to get access to the system.

h2. Wired internet access

Test d'utilisation en conditions réelles, mise en situation (ptet simulation avec un faux blessé toussa)

photo + explication