Node:events:518 throw err; // Unhandled 'error' event

Need Help With My Project
1

Hi my script works fine (js using node.js), for about 1 day, and then I randomly stops, and quits. (see code output below)
I am using raspberry Pi model 3 b+
all libraries are up-to-date as of 3sept2022@15:04pm AEST time.
any help would be greatly appreciated

Connecting to TCP: blynk.cloud 80
Connected
Authorized
node:events:518
    throw err; // Unhandled 'error' event
    ^

Error [ERR_UNHANDLED_ERROR]: Unhandled error. ('ECONNRESET')
    at new NodeError (node:internal/errors:372:5)
    at Blynk.emit (node:events:516:17)
    at Blynk.error (/home/doorpi/myapp/node_modules/blynk-library/blynk.js:649:8)
    at exports.TcpClient.<anonymous> (/home/doorpi/myapp/node_modules/blynk-library/blynk.js:612:48)
    at exports.TcpClient.emit (node:events:527:28)
    at Socket.<anonymous> (/home/doorpi/myapp/node_modules/blynk-library/blynk-node.js:59:14)
    at Socket.emit (node:events:527:28)
    at emitErrorNT (node:internal/streams/destroy:157:8)
    at emitErrorCloseNT (node:internal/streams/destroy:122:3)
    at processTicksAndRejections (node:internal/process/task_queues:83:21) {
  code: 'ERR_UNHANDLED_ERROR',
  context: 'ECONNRESET'
}

I have also opened GitHub issue: https://github.com/blynkkk/blynk-library/issues/571

2

I would have thought that it would make more sense to raise the issue against the Blynk node.js library on GitHub rather than the C++ library. Posting your full script would also a sensible move.

Pete.

3

I will raise thy issue on blynk node.js library now sir

below is my js script:

#!/usr/bin/env node


var BLYNK_TEMPLATE_ID = '*hidden for security*'
var BLYNK_DEVICE_NAME = 'Door1' 
var BLYNK_AUTH_TOKEN = '*hidden for security*'
var SERVER_ADDR = 'https://sgp1.blynk.cloud/'

var unlockedState = 800; // was 1000
var lockedState = 1800; // was 2200
// difference of 800 is approx. 90 deg 



disconnect = function (reconnect) {
    console.log('Disconnect blynk');
    if (typeof reconnect === 'undefined') {
        reconnect = true;
    }

    var self = this;
    this.conn.disconnect();
    if (this.timerHb) {
        clearInterval(this.timerHb);
        this.timerHb = null;
    }
    this.emit('disconnect');
    //cleanup to avoid multiplying listeners
    this.conn.removeAllListeners();

    //starting reconnect procedure if not already in connecting loop and reconnect is true
    if (reconnect && !self.timerConn) {
        console.log("REARMING DISCONNECT");
        setTimeout(function () { self.connect() }, 5000);
    }
}


var motorPin = 14;
var buttonPin = 4
var ledPinGreen = 17
var ledPinRed = 11 

var blynkToken = '*hidden for security*';



// *** Start code *** //

var locked = true

//Setup servo
var Gpio = require('pigpio').Gpio,
  motor = new Gpio(motorPin, {mode: Gpio.OUTPUT}),
  button = new Gpio(buttonPin, {
    mode: Gpio.INPUT,
    pullUpDown: Gpio.PUD_DOWN,
    edge: Gpio.FALLING_EDGE
  }),
  ledGreen = new Gpio(ledPinGreen, {mode: Gpio.OUTPUT});
  ledRed = new Gpio(ledPinRed, {mode: Gpio.OUTPUT});

//Setup blynk
var Blynk = require('blynk-library');
var blynk = new Blynk.Blynk(blynkToken, options = { 
connector : new Blynk.TcpClient()
});



var v0 = new blynk.VirtualPin(0);

console.log("locking door")
lockDoor()

button.on('interrupt', function (level) {
        console.log("level: " + level + " locked: " + locked)
        if (level == 0) {
                if (locked) {
                        unlockDoor()
                } else {
                        lockDoor()
                }
        }
});

v0.on('write', function(param) {
        console.log('V0:', param);
        if (param[0] === '0') { //unlocked
                unlockDoor()
                console.log("Door is unlocking...") // the web app will display unlocked
        } else if (param[0] === '1') { //locked
                lockDoor()
                console.log("Door is locking...") // the web app will display locked
        } else {
                blynk.notify("Door lock button was pressed with unknown parameter");
        }
});

//blynk.on('connect', function() { console.log("Blynk ready?"); });
//blynk.on('disconnect', function() { console.log("DISCONNECT"); });

function lockDoor() {
        motor.servoWrite(lockedState);
        ledRed.digitalWrite(0);
        ledGreen.digitalWrite(1);
        locked = true

        //notify
        blynk.notify("Door has been locked!");
  
        //After 1.5 seconds, the door lock servo turns off to avoid stall current
        setTimeout(function(){motor.servoWrite(0)}, 1500)

}

function unlockDoor() {
        motor.servoWrite(unlockedState);
        ledGreen.digitalWrite(0);
        ledRed.digitalWrite(1);
        locked = false

        //notify
        blynk.notify("Door has been unlocked!"); 

        //After 1.5 seconds, the door lock servo turns off to avoid stall current
        setTimeout(function(){motor.servoWrite(0)}, 1500)

}