NeoTrellis button doesn't respond

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jsharper
 
Posts: 2
Joined: Fri Aug 17, 2012 9:22 pm

NeoTrellis button doesn't respond

Post by jsharper »

Hello. While checking out the demo sequencer that ships with
the NeoTrellis M4 in the AdaBox 010 we recently received, my daughter
noticed that one of the 32 buttons was not working (the neopixel works, but
pressing the button does nothing).

To troubleshoot the hardware, I've swapped the two keypads (the problem
button stayed in the same spot relative to the PCB; it did not move with the
elastomer keypad) and inspected the PCB (nothing stood out visually as wrong or
damaged).

To troubleshoot the software, I've upgraded the bootloader to
v2.0.0, upgraded CircuitPython to 20181212, reformatted the flash with
storage.erase_filesystem(), restored the stock files from
neotrellis_m4_default_files.zip, and then wrote a quick script in REPL to
print out the current button state in a loop. All buttons trigger except
for that same original button, which would be button (1, 4).

Is there anything else I can try, or is my NeoTrellis M4 board defective?

Thanks
Jason
Order 1918648-0659230268

PS to forum members: sorry for the noise in the forum for what is likely to be an individual customer support issue; AdaFruit apparently only accepts support requests in the forum.

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johnpark
 
Posts: 985
Joined: Wed Mar 25, 2009 2:15 pm

Re: NeoTrellis button doesn't respond

Post by johnpark »

Hi, sorry to hear of the issue. Please post a clear photo of both sides of the board. We have seen one case where a surface mount diode had gotten knocked off the board at some point and one button was failing to trigger.
You may also want to try loading on another program that checks the buttons, such as https://learn.adafruit.com/neotrellis-l ... g/overview to make sure the button isn't responding.

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jsharper
 
Posts: 2
Joined: Fri Aug 17, 2012 9:22 pm

Re: NeoTrellis button doesn't respond

Post by jsharper »

While taking the pics, I did notice what looked like a possible missing diode for the button matrix. While I don't recall any rough handling on our part during the short time between taking it out of the box/bubblewrap and assembling the case around the board, it does look like the diode may have been present but knocked off at some point. There's even what looks to maybe be a scrape mark leading right up to the diode that I'd be a bit surprised if it happened on our end. These pics are rough (and man that dust - can't even see it in person) but it's the best I have:
missing.diode.1.png
missing.diode.1.png (725.83 KiB) Viewed 193 times
missing.diode.2.png
missing.diode.2.png (729.51 KiB) Viewed 193 times

In any case, I ordered a few new diodes as referenced in another thread from digikey and soldered one in place and now the button works!

Thanks for the hint.

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johnpark
 
Posts: 985
Joined: Wed Mar 25, 2009 2:15 pm

Re: NeoTrellis button doesn't respond

Post by johnpark »

Excellent, glad to hear you were able to fix that, enjoy your board!

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