esp8266 memory problems

Hi,

I have some memory problems with a js code.

I connect to wifi, resolve an ip addr, connect to onewire, get the ds18s20 sensor data, and every minutes it sends the data to thingspeak.

For a while (what is sometimes 5-10 horus, sometimes less), I got this (it disconnect from espruino ide, and I need to reconnect):

The response connection closed
connection close
{ "free": 107, "usage": 916, "total": 1023, "history": 1 }
>
Disconnected
>
Connected
>)ü
=undefined
>
=undefined
current temp:25.5
sendTsStart
{ "free": 213, "usage": 810, "total": 1023, "history": 17 }
ERROR: Out of Memory!
WARNING: Unable to create string as not enough memory
WARNING: Out of memory while appending to array
Execution Interrupted
current temp:25.5
sendTsStart
{ "free": 212, "usage": 811, "total": 1023, "history": 1 }
WARNING: Unable to create string as not enough memory
WARNING: Out of memory while appending to array
Execution Interrupted

Here is the code:

require("ESP8266").logDebug(false);

var ssid = "ssid";
var pass = "pass";

var ApiKey = 'apikey';


var peri = 60; //period of reading sensor in sec.

var iotHostName="thingspeak.com";
var iotIpAddr="";


var GPIO0 = new Pin(12); // GPIO0 | ~D3 port
var ow = new OneWire(GPIO0);
var sensor = require("DS18S20").connect(ow);

var GPIO2 = new Pin(2); // internal led
var toggle=1;

var startBlink = function()
{
  print("startBlink");
  setInterval(function() {
    toggle=!toggle;
      digitalWrite(GPIO2, toggle);
    }, 500);
};

var connectToWifi = function() {
  console.log('connecting to wifi');
  var GPIO2 = new Pin(2);

  digitalWrite(GPIO2, 1);
  ESP8266WiFi.init();
  ESP8266WiFi.connect(ssid, pass, function() {
    digitalWrite(GPIO2, 0);
    console.log('connected to wifi');
    var ipInfo = ESP8266WiFi.getIPInfo();
    print("Current IP address is: " +
      ESP8266WiFi.getAddressAsString(ipInfo.ip) + ':' +
      ESP8266WiFi.getAddressAsString(ipInfo.netmask));

    resolveIotAddress(repeat);

  });
};

var resolveIotAddress= function(callback)
{
  var ESP8266 = require("ESP8266");
  ESP8266.getHostByName(iotHostName, function(address) {

    iotIpAddr = ESP8266.getAddressAsString(address);
    console.log('resolved:' + iotIpAddr);

    startBlink();

    callback();

  });

};

var sendTs = function(temp) {
    console.log('sendTsStart');
    console.log(process.memory());

    var http = require("http");
    http.get({
        host: iotIpAddr,
        port: 80,
        headers: {
          'Host': 'tingspeak.com',
        },
        path: '/update?key=' + ApiKey + '&field1=' + temp
      },
      function(response) {
        print("get callback!");
        response.on('data', function(data) {
          console.log('connection getdata:');
          console.log(process.memory());
          print(data);
        });
        response.on('close', function() {
          print("The response connection closed");
          console.log('connection close');
          console.log(process.memory());

        });
      }
    );

};

var sendTemperature = function(temp)
{
  console.log('current temp:' + temp);
//  var field2 = 1 + Math.floor(Math.random() * 40);
  sendTs(temp);
};

repeat = function() {
  //var field1 = 1 + Math.floor(Math.random() * 40);
 // var field2 = 1 + Math.floor(Math.random() * 40);
//  sendTs(field1, field2);

  sensor.getTemp(sendTemperature);

  setTimeout(repeat, peri * 1000);
};


E.on('init', function() {
  connectToWifi();
});

The smallest value what I get, is the response in the sendTs function in respons.on data part:

{ "free": 17, "usage": 1006, "total": 1023, "history": 1 }
1331

I used a changed ds18b20 library to support ds18s20. I send it in the next post.

thanks,
HyGy