nanoDLP

archy587

Member

Registered: 2017-02-18

Posts: 11

manual display of .png file

Hello,

I am running nanoDLP on a RPI3 (Raspbian Buster) with a viewsonic projector connected to HDMI

I am tring to log into the RPI3 through SSH and manually display a .png image on the projector.

from what I have read I should be able to do this using fbi command line tool ( https://raspberrypi.stackexchange.com/q … arting-x11 )

but I cant find a variation of those commands that displays an image to the projector. I dont get an error, I just continue to get a blank screen. I can project layers and calibration grids from nanoDLP interface no problem.

The last post on that page says:

    I found that 'sudo fbi -vt ' works.

    You need to invoke 'sudo' to run fbi, to be able to access the actual virtual console which 'screen' is running on. (And hopefully you're not already running as root..!)

I don't really understand what he means by that, but does this mean that nanoDLP is running as root?

Maybe nanoDLP is blocking the fbi command from working?

thanks for any advice.

Shahin

Administrator

Registered: 2016-02-17

Posts: 3,546

Re: manual display of .png file

NanoDLP runs as root mostly for communication purpose. And in default mode even it does not use framebuffer except if you setup it this way.
To make sure you can terminate nanodlp.
sudo service nanodlp stop