Serial port input read

[duzymaju]

I'd like to communicate with Pi Pico both ways via USB serial port. In MicroPython I simply use sys.stdin to listen for input and print to send output back. Is there a way to listen for serial port data using Kaluma? Thanks in advance for help!
P.S. I understand that I can send output using just console.log.

[niklauslee]

@duzymaju 1.0.0-beta.13 is just released. Since 1.0.0-beta.13, you can use process.stdin and process.stdout. Here is the docs: https://docs.kaluma.io/api-reference/process#process.stdin

[duzymaju]

Thanks @niklauslee but when I tried to use process.stdin in 1.0.0-beta.13 I realized that it's undefined - I just logged whole process object and that's the result:

.hi
         ___
   _____/ . \   Welcome to Kaluma v1.0.0-beta.13
  /        __>  https://kaluma.io
 |/\________/
  \__@  v  v    Type '.help' for more info.
-----------------------------------------------

> 
> .flash -w
Transfer a file via YMODEM... (press 'a' to abort)
CCCCCCCCCCCCCC
Done
> 
> .load
{
  nextTick: [Function],
  title: 'browser',
  browser: true,
  env: {},
  argv: [],
  version: '',
  versions: {},
  on: [Function],
  addListener: [Function],
  once: [Function],
  off: [Function],
  removeListener: [Function],
  removeAllListeners: [Function],
  emit: [Function],
  prependListener: [Function],
  prependOnceListener: [Function],
  listeners: [Function],
  binding: [Function],
  cwd: [Function],
  chdir: [Function],
  umask: [Function]
}

Should I configure something differently? I use Kaluma web IDE.

[niklauslee]

Nothing required. Just use it according to the docs. (stdin is not shown by console.log because it is defined as readonly own property)

> .hi
         ___
   _____/ . \   Welcome to Kaluma v1.0.0-beta.13
  /        __>  https://kaluma.io
 |/\________/
  \__@  v  v    Type '.help' for more info.
-----------------------------------------------

> process.stdin
{
  _events: {},
  destroyed: false,
  readable: true,
  readableFlowing: false,
  readableEnded: false,
  writable: false,
  writableEnded: false,
  writableFinished: false,
  _native: {
    read: [Function]
  },
  emit: [Function],
  addListener: [Function],
  removeListener: [Function],
  removeAllListeners: [Function],
  listeners: [Function],
  listenerCount: [Function],
  on: [Function],
  off: [Function],
  once: [Function]
}

[duzymaju]

Forgive me if I don't see something crucial for this case in docs (I try to read it step by step n-th time) but the problem here (at least on my Raspberry Pi Pico with Kaluma v1.0.0-beta.13) is that even if I just upload properly defined in package.json main index.js file with exactly and only an example from process.stdin description in docs, I receive:

.hi
         ___
   _____/ . \   Welcome to Kaluma v1.0.0-beta.13
  /        __>  https://kaluma.io
 |/\________/
  \__@  v  v    Type '.help' for more info.
-----------------------------------------------

> 
> .flash -w
Transfer a file via YMODEM... (press 'a' to abort)
CCCCCCCCCCCCCC
Done
> 
> .load
TypeError: Cannot read property 'read' of undefined
  at <anonymous>:98
  at <anonymous>:96
  at <anonymous>:20
  at <anonymous>:84
  at <anonymous>:1

because from reasons unknown for me process object which exists in JS module (console.log(process)) is totally different than the one returned when I type process directly in console (this one indeed contains process.stdin):

.hi
         ___
   _____/ . \   Welcome to Kaluma v1.0.0-beta.13
  /        __>  https://kaluma.io
 |/\________/
  \__@  v  v    Type '.help' for more info.
-----------------------------------------------

> 
> .flash -w
Transfer a file via YMODEM... (press 'a' to abort)
CCCCCCCCCCCCCC
Done
> 
> .load
{
  nextTick: [Function],
  title: 'browser',
  browser: true,
  env: {},
  argv: [],
  version: '',
  versions: {},
  on: [Function],
  addListener: [Function],
  once: [Function],
  off: [Function],
  removeListener: [Function],
  removeAllListeners: [Function],
  emit: [Function],
  prependListener: [Function],
  prependOnceListener: [Function],
  listeners: [Function],
  binding: [Function],
  cwd: [Function],
  chdir: [Function],
  umask: [Function]
}
> process
{
  arch: 'cortex-m0-plus',
  platform: 'rp2',
  version: '1.0.0-beta.13',
  memoryUsage: [Function],
  binding: [Function],
  builtin_modules: [
    'events',
    'gpio',
    'led',
    'button',
    'pwm',
    'adc',
    'i2c',
    'spi',
    'uart',
    'graphics',
    'at',
    'storage',
    'wifi',
    'stream',
    'net',
    'http',
    'url',
    'rp2',
    'rtc',
    'path',
    'flash',
    'fs',
    'vfs_lfs'
  ],
  getBuiltinModule: [Function]
}
> process.stdin
{
  _events: {},
  destroyed: false,
  readable: true,
  readableFlowing: false,
  readableEnded: false,
  writable: false,
  writableEnded: false,
  writableFinished: false,
  _native: {
    read: [Function]
  },
  emit: [Function],
  addListener: [Function],
  removeListener: [Function],
  removeAllListeners: [Function],
  listeners: [Function],
  listenerCount: [Function],
  on: [Function],
  off: [Function],
  once: [Function]
}
> 

[niklauslee]

@duzymaju Sorry for the inconvenience. I found that the problem was caused by Webpack's process object polyfill in IDE.

Now we fixed the problem, so please try again in IDE.