You can also code with your familiar editors (e.g. Visual Studio Code, Atom, Sublime Text, etc.) and then upload the code with Kaluma CLI.

You can only upload only a single .js file with CLI. If you want to upload multiple .js files, you need to bundle them into a single .js file using Webpack or other bundlers.

Install Kaluma CLI

Open a terminal and install Kaluma CLI. Before installing CLI, please ensure that Node.js/NPM is already installed. Sometimes you may need to use sudo. If you are using Apple M1 Mac or Raspberry Pi OS, you need to install with --unsafe-perm and --build-from-source options.

$ npm install -g @kaluma/cli
​
# for Apple M1 or Raspberry Pi
$ sudo npm install -g @kaluma/cli --unsafe-perm --build-from-source

Write you code

Write your code with your familiar code editor.

index.js
const led = 25; // LED is GP25
pinMode(led, OUTPUT);
setInterval(function () {
  digitalToggle(led);
}, 1000);

Plug the board

Plug the board into USB port of your computer and then check serial port where the board is connect.

$ kaluma list  # list available serial ports
# e.g.) COM? (for Windows)
# e.g.) /dev/tty.usbmodem? (for MacOS)
# e.g.) /dev/ttyACM? (for Linux)

Upload your code

Upload your code to the board using CLI.

$ kaluma write index.js -p <port>