Cannot Open Display

[holmesha]

Per my last message I hooked up a slightly larger 7.5in display. I altered the epd name in the systemsix.py file and the eink_utils.py file as well as the display size to 800, 480. It seems to successfully pull the weather and calendar info, but unfortunately I can't get it to display. I get the following error:

INFO:app:systemsix.update_display(); updating display.
option parsing failed: Cannot open display:
^CTraceback (most recent call last):
File "/home/pi/SystemSix/systemsix.py", line 557, in
main()
File "/home/pi/SystemSix/systemsix.py", line 553, in main
time.sleep(5)

Any ideas on where I might be going wrong? I know you said to try turning off the display to test run it, but I'm running this out of a Mac terminal and I'm not sure how to get that to display without the e-ink screen. Thanks!!

[EngineersNeedArt]

My guess is that you need to include the correct e-ink driver that matches your 7.5" display. Can you share with me the change you made in that regard?

[EngineersNeedArt]

This line will have to be changed to match your display:

import lib.epd5in83_V2 as eInk

[EngineersNeedArt]

I see these possible driver libraries:

epd7in5.py
epd7in5_HD.py
epd7in5_V2.py
epd7in5b_HD.py
epd7in5b_V2.py
epd7in5bc.py

If I had to guess, I would start with epd7in5_V2.py.

[holmesha]

Unfortunately it seems to be something else. I changed it in both the systemsix and eink_utils files to epd7in5b_v2.py. I confirmed that was the one when I used it with the Waveshare demo code.

[EngineersNeedArt]

So the demo code from Waveshare worked? Would be interesting to see how that code differs from SystemSix's code. Perhaps they initialize the panel differently.

BTW, I haven't tried Mac Terminal but I did try using PyCharm CE on the Mac.
If you flip USE_EINK_DISPLAY to False there is the line of code final_image.show() that, at least in PyCharm, opened the image with Preview on the Mac.

[holmesha]

Thank you so much! I'm sure you have better things to do on a Sunday afternoon, but I appreciate it. I'll definitely give PyCharm a try to make sure nothing else is wonky.

Yep the Waveshare demo worked and I was actually able to get 13bytes' calendar to work. I'll compare the display code. Wondering also if there may be an updated driver. Thanks again!

[holmesha]

I updated the driver and I get a new error

WARNING:app:display() missing 1 required positional argument: 'imagered'
INFO:app:systemsix.update_display(); trying to module_exit().
Traceback (most recent call last):
File "/home/pi/SystemSix/systemsix.py", line 556, in
main()
File "/home/pi/SystemSix/systemsix.py", line 547, in main
update_or_start(True)
File "/home/pi/SystemSix/systemsix.py", line 533, in update_or_start
update_display(period)
File "/home/pi/SystemSix/systemsix.py", line 369, in update_display
raise e
File "/home/pi/SystemSix/systemsix.py", line 356, in update_display
epd.display(epd.getbuffer(ink_image))
TypeError: display() missing 1 required positional argument: 'imagered'

[EngineersNeedArt]

Interesting. 13bytes calendar used a display that had red in addition to black. The call to display the image, maybe it's epd.display(), took an extra image argument. You would pass the black image and a separate red image.

You might try just passing None, like epd.display(epd.getbuffer(ink_image), None)

Or if None is not allowed, just create an empty image for the red image and pass it.

[EngineersNeedArt]

Something like:

red_image = Image.new(mode="RGBA", size=(800, 480), color='white')

Then:

epd.display(epd.getbuffer(ink_image), red_image)

[holmesha]

Thank you so much again. If this doesn't work I will cut my losses and buy the same screen!

[EngineersNeedArt]

It's clear to me you are close.

BTW, code above probably should be:

red_image = Image.new(mode="RGBA", size=(800, 480), color='white')
epd.display(epd.getbuffer(ink_image), epd.getbuffer(red_image))

I forgot the epd.getbuffer() for the red image. You can see it in 13Bytes code.

[holmesha]

That did it, thank you! Beautiful.

I'm going to mess around with the size of the picture a little bit to reflect the larger screen, but it is amazing!

[EngineersNeedArt]

Very cool. Happy to have tried to help.