Check if the screen is working or not

1

Hey there,

The screen I am using is in a remote location, which is hard to reach.
Can I check somehow if it works or not via ssh?

Thanks for the tips! :slight_smile:

2

no, it’s blind, you send data and get no feedback as to whether it worked

3

makes sense. thats what I thoungh.
Maybe with an additional power monitoring.

4

OK, is there a way to generate a BMP file (or similar) of what has been sent thanks to the library ? That would allow to make a “fake” rendering at least to give a feedback of what it “should” look like

5

you can dump the canvas which is an array of RGB888 (24bit), add a PPM header and dump a PPM file.

6

Thanks for this quick and positive answer. That would be very straightforward.
Any hint on how to dump the canvas array, if possible using python bindings ?

Johan

7

Have a look at examples-api-use/ledcat.cc, it does the opposite but should be close enough

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