"Acorn parse for compiler/plugins.js failed"

[espruino-discuss]

Posted at 2017-12-30 by user84292

I'm getting the message in the subject lines when I upload my program, but without any ill effect that I can detect. A Google search turns up no results.

When the message displays it also says "Check editor window for errors", but there are no errors.

Anyone have an idea what's going on?

[espruino-discuss]

Posted at 2018-01-04 by @gfwilliams

Would you be able to post up the code that you're using so we can take a look?

Usually it happens when you've got some JavaScript code that isn't valid somehow, but it can also happen when using newer ES6 features that the Acorn parser can't handle. About the only bad side effect is some things like the ability to compile code won't work for you.

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Posted at 2018-01-04 by user84292

Sure, here you go. The Web output is like a REST/JSON response that gives a sliding window of readings:

{
"current" : 41.4,
"log" : [
	{ "1514836500" : 47.9 },
	{ "1514836800" : 41.4 },
	{ "1514837100" : 39.5 },
	{ "1514837400" : 39.3 },
	{ "1514837700" : 39.1 },
	{ "1514838000" : 39.1 },
	{ "1514838300" : 38.9 },
    . . . .
	{ "1515066900" : 41.4 },
	{ "1515067200" : 41.4 },
	{ "1515067500" : 41.4 }
]
}

I also send the readings to Graphite so I have a historical view (attached).

// Wifi setup
var WIFI_NAME = "myssid";
var WIFI_OPTIONS = { password : "mypassword" };
var wifi;

// Where we are in the array.  Once full we'll shift and add to the end
var arr_ptr = 0;

// Max samples.  
//    672 is 30 days of 15m samples
//    4320 is 30 days of 5m samples
var maxSamples = 4320;

// How often to take a sample in seconds
var sampleSec = 300;

// Our sample arrays
var ts_arr = Uint32Array(maxSamples);
var temp_arr = Float32Array(maxSamples);

// Array elements filled
var arr_elements = 0;

// Initial temperature setting
var tempF = 32;

// One wire object
var ow = new OneWire(B0);

// HTTP object
var http = require("http");

// Sensor object
var sensor = require("DS18B20").connect(ow);

// Fahrenheit?
var fahr = true;

// Graphite server
graphite_host = "192.168.0.48";
graphite_port = 2003;


// Connect to WIfi
function onInit() {
  wifi = require("EspruinoWiFi");
  wifi.connect(WIFI_NAME, WIFI_OPTIONS, function(err) {
    if (err) {
      console.log("Connection error: "+err);
      return;
    }
    console.log("Connected!");
    setTimeout(initProcess, 1000);
  });
}

// Get the temperature
function updateTempF() {
  sensor.getTemp(function (sensor_temp) {
    tempF = ((sensor_temp * 9) / 5) + 32;
  });
}


// Initialization
function initProcess() {
  // Get a page so we can get the current date from the header
  http.get("http://www.pur3.co.uk/hello.txt", function(res) {
    // Set our time bsaed on the header date
    now = res.headers.Date;
    epoch = Date.parse(now);
    setTime(epoch/1000);
    date = new Date();
    console.log("Init: ", date.toUTCString());

    // Set logging and the server to start after a few seconds
    updateTempF();
    setTimeout(startLogging, 3000);
    setTimeout(startServer, 5000);
  });
}


// Start our Web server
function startServer() {
  console.log("Starting server");
  http.createServer(function (req, res) {
    updateTempF();
    res.writeHead(200, {'Content-Type': 'application/json'});
    if (arr_elements === 0) {
      res.end("{\n\"current\" : " + tempF.toFixed(1) + ",\n\"log\" : []\n}");
      return();
    }
    var i = 0; 
    res.on('drain', function() {
      for (var n = 0; n < 10; n++) {
        sample = "\n\t{ \"" + ts_arr[i] + "\" : " + temp_arr[i].toFixed(1)+ " }";
        res.write(sample);
        if (++i == arr_elements) {
          res.end("\n]\n}");
          break;
        }
        else {
          res.write(",");
        }
      }
    });

    page = "{\n\"current\" : " + tempF.toFixed(1) + ",\n\"log\" : [";
    res.write(page);
  }).listen(80);
}


// Start logging the temperature
function startLogging() {
  console.log("Starting logging");
  setInterval(function() {
    sensor.getTemp(function (sensor_temp) {
      now = Date.now() / 1000;
      floor = parseInt(now);
      if (fahr)
        tempF = ((sensor_temp * 9) / 5) + 32;
      else
        tempf = sensor_temp;
      mod = floor % sampleSec;
      if (!mod) {
        if (arr_ptr == maxSamples) 
          arr_ptr = 0;
        ts_arr[arr_ptr] = parseInt(floor);
        temp_arr[arr_ptr++] = tempF;
        if (++arr_elements > maxSamples)
          arr_elements = maxSamples;
      }
      // Also send to Graphite
      socket = require("net").connect({"host" : graphite_host, "port" : graphite_port}, function() {
        msg = "espruino-attic-oaktreepeak-com.temperature " + tempF + " " +  now + "\n";
        socket.write(msg);
        socket.end();
      });
    });
  }, 1000);
}

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Attachments:

• graph.jpg

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Posted at 2018-01-04 by @gfwilliams

Looks great!

It seems to be because you wrote return(). If you change it to return it should work. I'm actually surprised the linter didn't pick that up...

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Posted at 2018-01-04 by user84292

Geez, I move between C++, Python, Java, Scala . . . .

All those have the parentheses. Habit!