Arduino - Notes

With Ubuntu 18.04 serial port permissions changed, so to allow Arduino IDE to write to the board do the following:

sudo chmod a+rw /dev/ttyACM0

Uploading a compiled .hex file to an Arduino board using avrdude:

1. Plug in your Arduino
2. Select your Arduino board from the Arduino IDE Tools > Board menu
3. Select your Arduino board's port from the Tools > Port menu
4. Select File > Preferences from the Arduino IDE menus.
5. Check the box next to "Show verbose output during: [] upload".
6. Click the OK button.
7. Select Sketch > Upload from the Arduino IDE menus.
8. Wait for the upload to finish.
9. Scroll up in the black output panel at the bottom of the Arduino IDE window until you see the avrdude command.
10. On Linux with Uno selected it looks something like:

    /home/stevet/.arduino15/packages/arduino/tools/avrdude/6.3.0-arduino17/bin/avrdude -C/home/stevet/.arduino15/packages/arduino/tools/avrdude/6.3.0-arduino17/etc/avrdude.conf -v -patmega328p -carduino -P/dev/ttyACM0 -b115200 -D -Uflash:w:/home/stevet/Downloads/grbl_v1.1h.20190825.hex:i

11. Select and copy the avrdude command.
12. Paste the avrdude command to the command line.
13. Change the file name to the .hex file you want to upload.
14. Add quotes around the paths that had spaces in them.