Saving data from arduino to a text file

Projects Interfacing w/ Software on the Computer
1

I built a circuit that detects tempretuares from 5 different places using an Arduino nano.

Then I used Serial port library in Javascript to read the data in the Terminal(I'm using a Mac).

I can read the data in the terminal now but I'm trying to save the data to a text file but it's not working.
I using node.js but no luck

Here is my javascript code

var SerialPort = require('serialport');
var Readline = SerialPort.parsers.Readline;
var port = new SerialPort('/dev/cu.usbserial-A505BRMT');
var parser = new Readline();
port.pipe(parser);
parser.on('data', console.log);
port.write('ROBOT PLEASE RESPOND\n');

// Creating the parser and piping can be shortened to
var parser = port.pipe(new Readline());


var fs = require('fs')
var readingTotextfile = port.pipe(parser);
fs.appendFile('message.txt', 'My file', function(err) {
    
  console.log('The "data to append" was appended to file!');
});

in my messeage.txt file I only see this "My file". I tried different things some times I saw [object Object]
and other time is saw random things

After I get the data to be saved in a text file, I want to use a chart library to make a graph of my data.

Any help would be great

Screen Shot 2017-07-29 at 6.36.25 PM.png
Screen Shot 2017-07-29 at 6.36.25 PM.png1037×734 83.8 KB

2

Any proper terminal programme should be able read serial data direct from Arduino, just like the serial monitor in the Arduino IDE, and record it to a text file - all without any messing with Arduino code. I recognise that you are using a mac, but I can't believe you cannot do the same thing.

Such a file can be opened in Excel and a chart made therefrom.

3

Try using FileZilla.