Nora Thing Plus w306 shows I2C device at every address

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1

Hello,

I am having an issue with my Nora Thing Plus. I ran an I2C scanner and it shows a peripheral at every address. It was working fine, then randomly decided that the two Qwiic I2C devices I had connected didn’t want to work as before.

As an example, I have a sparkfun Qwiic buzzer that worked previously. Now the buzzer.begin() function just freezes the board. Additionally, I have a Qwiic OLED connected. Even if the screen is disconnected, the board still says connection is successful. The setup I have also involves a button connected from GND to Pin 2.

I am wondering if I shorted something in my board or there’s an issue with a pull-up resistor. Any advice would be helpful.

Thanks

2

Share a photo of the wiring/soldering

Does a reset change anything?Hardware Overview - SparkFun Thing Plus NORA-W306 Hookup Guide

Are you testing the peripherals individually?

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Reset/reboot doesn’t seem to change anything. Peripherals are tested individually. The peripherals are not shown in the pictures, but I just have them connected to the Qwiic port with a Qwiic cable. I2C scan was done with nothing connected.

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Are the inward-bent pins touching the components? (2, G)

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The inward bent pins do not make contact with the board itself. Here are some images of a different angle. The wires are connected to a simple momentary button. I2C scanner results the same, regardless if these pins are connected or not.

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6

Gotcha. The soldering looks good, the only thing I can think of is I believe I see residual flux on most of the pins…I’d grab some IPA and give it a-scrubbin’, particularly the SDA/SCL area up top, and see if anything changes

If that fails it might be a defective device

7

Thanks, I will give that a try. I have some desolder wick. Is it worth trying to desolder those I2C pins? I only need the Qwiic ports on this board.

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Not usually, leaving them in-place should be fine

You can also use a multimeter to probe them and see if there is continuity/short

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Ok, thank you for the help. I did not detect a short on the SDA/SCL pins with the voltmeter. I will submit an RMA.

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