NeoKey 1x4 QT I2C Breakout not found

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adam5532
 
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NeoKey 1x4 QT I2C Breakout not found

Post by adam5532 »

I have a new NeoKey 1x4 QT I2C Breakout and it can not be found or reports the wrong address.

Bus scan Feather M4 w CP7.3.3:
Not found

Bus scan Feather ESP32-S3 CP8 beta4
0xb

The power light is on, and I know that the bus is good, as it is daisy-chained with STEMMA cables and a device connected after it is found and works properly.

I don't see any explanation other than that it is just defective, but checking if I missed anything.

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adam5532
 
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Re: NeoKey 1x4 QT I2C Breakout not found

Post by adam5532 »

Correction: 0xb is on the ESP32-S3 Feather, so it isn't being found on that micro either.

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Re: NeoKey 1x4 QT I2C Breakout not found

Post by adafruit_support_carter »

Which specific Feather M4 are you using?

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adam5532
 
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Re: NeoKey 1x4 QT I2C Breakout not found

Post by adam5532 »

M4 Express 3857
and
ESP32-S3 Feather with 4MB Flash 2MB PSRAM 5477

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Re: NeoKey 1x4 QT I2C Breakout not found

Post by adafruit_support_carter »

Thanks. For now, focusing on just the Feather M4. The Feather M4 Express (PID 3857) does not have a dedicated STEMMA QT connector, so the header pins will need to be used - at least on the Feather side. How are you making the connection between the Feather M4 and the NeoKey?

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adam5532
 
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Re: NeoKey 1x4 QT I2C Breakout not found

Post by adam5532 »

Breadboard pins to STEMMA connector. The encoder is daisychained after the NeoKey to verify that power and I2C bus connections are good. Only the decoder at 0x36 is found.
m4-hookup.jpg
m4-hookup.jpg (188.82 KiB) Viewed 113 times
port-scan.jpg
port-scan.jpg (78.36 KiB) Viewed 113 times

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Re: NeoKey 1x4 QT I2C Breakout not found

Post by adafruit_support_carter »

Thanks for the photo of the setup and test output.

Just to check - are the headers soldered on the Feather?

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adam5532
 
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Re: NeoKey 1x4 QT I2C Breakout not found

Post by adam5532 »

Yes, of course they are soldered. Same result plugging into breadboard vs directly into M4 headers.

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Re: NeoKey 1x4 QT I2C Breakout not found

Post by adafruit_support_carter »

OK, thanks for verifying. That all seems fine. Not sure what's wrong - the address should just show up like the rotary knob. Let's just replace it.

Send an email to [email protected] with a link to this thread and your order number and they can send you a replacement NeoKey 1x4.

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Re: NeoKey 1x4 QT I2C Breakout not found

Post by adam5532 »

OK, thanks.

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