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Display Not Reacting - Feather M0 RFM69HCW + 2.13" Tri-Color
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Display Not Reacting - Feather M0 RFM69HCW + 2.13" Tri-Color

by whogben on Wed Aug 14, 2019 8:55 pm

Greetings,

I can't get the e-ink display featherwing to react, and I think this one may be defective.

I am testing with the EPDTest.ino example that the library ships with, and have updated the pinouts to match my Feather M0 from the other example, FeatherWingTest.ino (attached).

Using Serial.print I can find that the "epd.display()" method is taking 10 or so seconds, but nothing happens on the display - it still shows the default image that it shipped with.

I haven't tried cutting the SD card trace, as the documentation does not describe it as a requirement and I don't want to do any work on the product in case it's defective and I need to return it.

The main reason to think it's defective, is that two of the pins on it that should be connected aren't - picture attached:
Image

(I found this by putting in two rows of headers, and working my way down each pair of pins with a multimeter identifying the one that doesn't connect).

What do you think, does that failing pin connection indicate I need a new unit to make it work?



Order #2107948-4125775442
Attachments
eInkDisplayTest.ino
(1.87 KiB) Downloaded 5 times

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Re: Display Not Reacting - Feather M0 RFM69HCW + 2.13" Tri-C

by adafruit_support_carter on Thu Aug 15, 2019 1:17 pm

The photo didn't come through for some reason. Can you please try again.

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Re: Display Not Reacting - Feather M0 RFM69HCW + 2.13" Tri-C

by whogben on Fri Aug 23, 2019 5:40 pm

Hmm not sure why I didn't get the email notice of your reply - anyway here's a link to the image showing the defective pin:

https://share.icloud.com/photos/0wbg5ew ... OEQQwc4Wbg

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Re: Display Not Reacting - Feather M0 RFM69HCW + 2.13" Tri-C

by adafruit_support_carter on Fri Aug 23, 2019 6:20 pm

Inlining image for reference:
pin_test.jpg
pin_test.jpg (135.77 KiB) Viewed 77 times

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Re: Display Not Reacting - Feather M0 RFM69HCW + 2.13" Tri-C

by adafruit2 on Sun Aug 25, 2019 2:18 pm

woops you're right! A5 is not connected thru on the PCB, we'll fix it in rev C

*however* that pin is not used (which is also why the bug wasnt caught) so it's something else! as you expect, we do test each one with a feather that's how we get the image on

dont forget you have to set the M0 pin 8 to be an output and pulled high

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Re: Display Not Reacting - Feather M0 RFM69HCW + 2.13" Tri-C

by whogben on Mon Aug 26, 2019 3:36 pm

Can you tell me more about this pin 8 requirement? I didn't find a reference about it in the sample code or the tutorials as far as I can tell, but maybe I've been using the wrong tutorials / samples?

These are the tutorials I used to try and get it working:
https://learn.adafruit.com/epaper-display-featherwing-quote-display/overview
https://learn.adafruit.com/adafruit-eink-display-breakouts

Apologies if it's listed and I missed it! If so, can you point me to it? If not, can you look at the code I posted, and show me where you'd add it to make it work - or can you share your own working code that you used to test the EPD before shipping it?

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Re: Display Not Reacting - Feather M0 RFM69HCW + 2.13" Tri-C

by adafruit2 on Mon Aug 26, 2019 4:03 pm


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