How to use the 'node_helper', 'serialport'

nhpunch

const NodeHelper = require('node_helper')
const Serialport = require("serialport");

module.exports = NodeHelper.create({

  start: function () {
  },

  socketNotificationReceived: function (notification, payload) {

    if (notification === 'CONFIG') {
      const self = this;
      self.config = payload;
    }
    else if(notification ==='BUTTON_PRESSED')
    {
    var serialport = new Serialport('/dev/ttyACM0', {   
		baudRate: 9600
		});

    var led = 0;

      serialport.open(function () {
        console.log('connect...');
        serialport.on('data', function(data) { // 아두이노로부터 전달된 데이터
          console.log('data received: ' + data);
        });
        
        if(this._isPushed==false)
        {
          serialport.write("0");
        }
        else if(this._isPushed==true)
        {
          serialport.write("1");
        }
      });
    }
  }, 
})

Thank you very much…!!! Overlay is not important.

It was working as you told me.

Currently, node_helper sets the following, but serial.write does not work. May I ask you one last time?

I’m really desperate:folded_hands_light_skin_tone: :folded_hands_light_skin_tone: :folded_hands_light_skin_tone: :folded_hands_light_skin_tone:

https://github.com/nhpunch/sohard

I uploaded the Arduino code.

int led = 13;

void setup() {
  Serial.begin(9600);
  pinMode(led, OUTPUT);
  Serial.println(“hello”);
}

void loop() {
  static int incomingValue = 0; // nodeJS에서 보낸값

  if ( Serial.available() > 0 ) { // 뭔가 입력값이 있다면
    incomingValue = Serial.read();
    Serial.println(incomingValue);
  }
  
  if ( incomingValue == 49 ) { // 값이 ‘1’ 이면
  digitalWrite(13, HIGH); // LED를 켠다.
  }
  if ( incomingValue == 48 ) { // 값이 ‘0’ 이면
  digitalWrite(13, LOW); // LED를 끈다.
  }
  deayl(2000);
}

sdetweil

@nhpunch said in How to use the 'node_helper', 'serialport':

   if(this._isPushed==false)

where is _isPushed defined or set?

i know it is in module_name.js, but node_helper cannot see it…

you should send that as the payload on button_pressed message

nhpunch

socketNotificationReceived: function (notification, payload) {

    if (notification === 'CONFIG') {
      const self = this;
      self.config = payload;
    }
    else if(notification ==='BUTTON_PRESSED')
    {
      this._isPushed = payload;
    var serialport = new Serialport('/dev/ttyACM0', {   
		baudRate: 9600
		});

Is that right? I’m really sorry for you.

sdetweil

@nhpunch yes if you send it that way

this.sendSocketNotification(“BUTTON_PUSHED”,this._isPushed)

nhpunch

@sdetweil

false, true works with two button in module

It seems that the value can not be sent to the node_helper

why?

	buttonoff.addEventListener('click', ()=> {
			Log.log("button pushed 'on'")
   			this._isPushed = false;
			console.log(this._isPushed);
   	});
	button.addEventListener('click', ()=> {
			Log.log("button pushed 'off' ")
   			this._isPushed = true;
			console.log(this._isPushed);
   	});

this is module

          serialport.write(this._isPushed==true? '1' : '0');

this is node_helper

nhpunch

@sdetweil

    else if(notification ==='BUTTON_PRESSED')
    {
      this._isPushed = payload;
      console.log(payload);

‘false’ is displayed in the terminal window

._isPushed is passed to node_helper, but I think that the changed value is not sent when the button is pressed.

Please advise…:folded_hands_light_skin_tone: :folded_hands_light_skin_tone: :folded_hands_light_skin_tone:

If this is solved, it’s really a success.:flexed_biceps_light_skin_tone:

sdetweil

@nhpunch said in How to use the 'node_helper', 'serialport':

	buttonoff.addEventListener('click', ()=> {
			Log.log("button pushed 'on'")
   			this._isPushed = false;
			console.log(this._isPushed);
                        this.sendSocketNotification(“BUTTON_PUSHED”,this._isPushed)
   	});
 	 button.addEventListener('click', ()=> {
 			Log.log("button pushed 'off' ")
    			this._isPushed = true;
 			console.log(this._isPushed);
                        this.sendSocketNotification(“BUTTON_PUSHED”,this._isPushed)
         });

nhpunch

._isPushed was sent

but there was an error… im really sad

sdetweil

@nhpunch that is in the node_helper, serial library

looks like serialport.write(data: string|Buffer|Array,

i don’t know anything about serial port api… looks like promise based, so would need callbacks or .then()

nhpunch

@sdetweil

omg… I’m so screwed up

My ignorantness makes me cry…'ㅠ I don’t know why there was a mistake

Thank you @sdetweil You’re awesome!