Qwiic Micro lost it's port!

Development Boards
1

I recently bought a Sparkfun Qwiic Micro board because it is the perfect size for my project, and I am somewhat familiar with the SAMD platform. I ran a couple test sketches (blink, and then serial response test using SerialUSB) They both worked fine. I connected a Sparkfun Cryptographic CoProcessor board via the QWIIC connector. I had previously used the crypto board with an Artemis Redboard, and it works correctly.

When I tried to upload my program to the QWIIC Micro the error response was:

"No device found on cu.URT1

An error occurred while uploading the sketch"

The port I had been using with the board had disappeared, and none of the available ports would connect with the board. Note that ‘cu.URT1’ was not the port I had originally connected to - that port had the name of the board in it. I can no longer program the board, since it won’t connect to the IDE.

I’m using an iMac and Arduino IDE 1.8.12. I have tried restarting everything, to no avail.

Do you have any advice? I have just ordered a second board, but I am hesitant to use it until I understand what went wrong here.

2

Hi Chris.

You likely had the IDE set for the wrong board voltage and that will cause the port to disappear if you upload a sketch with those settings. For the Qwiic Pro Micro, you’re going to want to set the IDE to ATmega32U4 (5V, 16MHz).

Fortunately this is recoverable, you just need to follow the directions in the [Troubleshooting section of the hookup guide to revive the board.](Qwiic Pro Micro USB-C (ATmega32U4) Hookup Guide - SparkFun Learn)

3

Thanks Chris!

It’s the SAMD version of the micro: [https://www.sparkfun.com/products/15423](SparkFun Qwiic Micro - SAMD21 Development Board - DEV-15423 - SparkFun Electronics)

4

Can you try pressing the Reset button twice to put the board into Bootloader mode and see if it re-enumerates?

5

Thanks Brandon!

After reading the previous reply and realizing I had not specified which Micro I was using, I found the Qwiic Micro SAMD troubleshooting page where exactly what you said was recommended.

I did it, and it worked like a charm. My Qwiic Micro SAMD is now working.

Thanks again to both of you!