Error while uploading the sketch to Arduino UNO using CLI

Question

I have connected my Arduino UNO through USB to Raspberry pi 3B. I am using CLI for editing, compiling and uploading sketches > arduino-cli upload --fqbn arduino:avr:uno cli-test. However, after attempting to upload the sketch, it throws the error, Error during Upload: Failed uploading: no upload port provided I even checked if the Arduino is detected on the respective port using arduino-cli board list and it shows

/dev/ttyACM0 serial Serial Port (USB) Arduino Uno arduino:avr:uno arduino:avr
/dev/ttyAMA0 serial Serial Port Unknown

The support forum of Arduino says to 'select' the port. Nevertheless the support forum resolves the error for GUI application and not for CLI. I searched for how to select the port in CLI, but in vain. Any help is appreciated.

• Juraj: arduino.github.io/arduino-cli/0.23/getting-started/…

Answer 1

You specify the port with the --port flag to the upload command:

$ arduino-cli upload --fqbn arduino:avr:uno --port /dev/ttyACM0 cli-test

You can find all these things out for yourself by using --help at any time. For example:

$ arduino-cli upload --help
Upload Arduino sketches. This does NOT compile the sketch prior to upload.
Usage:
 arduino-cli upload [flags]
Examples:
 arduino-cli upload /home/user/Arduino/MySketch
Flags:
 --board-options strings List of board options separated by commas. Or can be used multiple times for multiple options.
 --discovery-timeout duration Max time to wait for port discovery, e.g.: 30s, 1m (default 1s)
 -b, --fqbn string Fully Qualified Board Name, e.g.: arduino:avr:uno
 -h, --help help for upload
 --input-dir string Directory containing binaries to upload.
 -i, --input-file string Binary file to upload.
 -p, --port string Upload port address, e.g.: COM3 or /dev/ttyACM2
 -P, --programmer string Programmer to use, e.g: atmel_ice
 -l, --protocol string Upload port protocol, e.g: serial
 -t, --verify Verify uploaded binary after the upload.
Global Flags:
 --additional-urls strings Comma-separated list of additional URLs for the Boards Manager.
 --config-file string The custom config file (if not specified the default will be used).
 --format string The output format for the logs, can be: text, json, jsonmini, yaml (default "text")
 --log-file string Path to the file where logs will be written.
 --log-format string The output format for the logs, can be: text, json
 --log-level string Messages with this level and above will be logged. Valid levels are: trace, debug, info, warn, error, fatal, panic
 --no-color Disable colored output.
 -v, --verbose Print the logs on the standard output.