How to load Arduino sketch on SparkFun Qwiic Pro Micro - USB-C (ATmega32U4) from Apple Silicon Mac

Qwiic System
6

Ok, I have returned with more ideas…First, try this more reliable upload procedure:

  1. In the Arduino IDE, click the “Upload” button first
  2. Wait until you see “Waiting for upload port…” in the console
  3. Only then double-click the reset button on the board
  4. The upload should complete before the bootloader times out

If that doesn’t work, we can try a more aggressive approach:

  1. Open Terminal
  2. Run: ls -l /dev/tty.usb* to confirm no board is present
  3. Create a loop to watch for the device:

bash

while true; do ls /dev/tty.usb*; sleep 0.5; done
  1. In another Terminal window, prepare this command but don’t run it yet:

bash

/Users/zach/Library/Arduino15/packages/arduino/tools/avrdude/6.3.0-arduino17/bin/avrdude -C/Users/zach/Library/Arduino15/packages/arduino/tools/avrdude/6.3.0-arduino17/etc/avrdude.conf -v -patmega32u4 -cavr109 -P/dev/tty.usbmodem5101 -b57600 -D -Uflash:w:[YOUR_HEX_FILE_PATH]:i
  1. Double-press the reset button
  2. As soon as you see the device appear in the first Terminal window, quickly run the avrdude command in the second window

If these methods don’t work, we can try:

  1. If available, trying a different computer to rule out OS-specific issues
  2. Upload Workaround**

bash

# Terminal command to force persistent port recognition
screen /dev/cu.usbmodem5101 1200

Run this immediately after resetting the board to keep the port active