Deno support?

[svefro]

Has anybody got this working with deno. i tried but app exits without error.

Sample code:

import "jsr:@std/dotenv/load"; // to get debug messages from npm package
// .env file contains 'DEBUG=serialport*'

import { SerialPort,ReadlineParser  } from 'npm:serialport'

const ports = await SerialPort.list()
const serial_port_path = "COM4" 
let found_port= false

for (const port of ports){
    // @ts-ignore: linter complains about friendlyName, disable error
    console.log(port.path + " (" + port.friendlyName + ")")


    if (serial_port_path == port.path){
        found_port = true
        
    }
}



if (found_port == false){
    console.error("did not find PORT: " + serial_port_path +  "")
}


const current_port = new SerialPort({ path: serial_port_path, baudRate: 115200 ,autoOpen: false})

current_port.open(function (err) {
    if (err) {
      return console.log('Error opening port: ', err.message)
    }
  
  })
  
  // The open event is always emitted
current_port.on('open', function() {
    // open logic
    console.log("Port open")
    

})


// const parser = new ReadlineParser()
// current_port.pipe(parser)
// parser.on('data', (data)=>{
//     console.log(data)
// })


setTimeout(()=>{
    
    
    

    current_port.write('main screen turn on\r\n', function(err) {
        if (err) {
          return console.log('Error on write: ', err.message)
        }
        console.log('message written')
      })
},500)

console.log("Exiting in 5seconds")
setTimeout(()=>{
    console.log("Exiting")
    Deno.exit()
},5000)



Deno.addSignalListener("SIGINT", () => {
    current_port.close()
    
    console.log("SIGINT!");
    Deno.exit();
  });

Deno.addSignalListener("SIGBREAK", () => {
    current_port.close()
    
    console.log("SIGBREAK!");
    Deno.exit();
  });

outputs:

deno run -A .\deno_serialport.ts
  serialport/bindings-cpp loading WindowsBinding +0ms
COM3 (Original Prusa i3 MK2 (COM3))
COM1 (Communications Port (COM1))
COM4 (USB-SERIAL CH340 (COM4))
COM5 (USB Serial Port (COM5))
  serialport/stream opening path: COM4 +0ms
  serialport/bindings-cpp open +0ms
Exiting in 5seconds
  serialport/stream opened path: COM4 +4ms
Port open
  serialport/stream _write 21 bytes of data +503ms
  serialport/bindings-cpp write 21 bytes +507ms
PS O:\OneDrive\Programming\deno\location_commander> 

[reconbot]

I believe without reading data there's nothing keeping the event loop alive. Haven't used deno.