IoT Services

There are quite a lot of IoT cloud service providers around at the moment. We've collected some sample code for a selection of them below. If you've got some code you'd like to share, please contribute it (you can submit changes via this page on GitHub).

Note: To avoid duplication, all of this code expects that you already have an Internet connection.

Vizibles

Vizibles is an IoT platform with both, data collection and action triggering roles, for your things.

They offer a custom firmware for ESP8266, which makes all the hard work of connecting to the platform, and an Espruino module for interfacing with it. This makes very easy writing applications with sensors and actuators in Espruino for the Vizibles platform.

var vz-options = {
  'keyID': 'MY KEY ID',
  'keySecret' : 'MY KEY SECRET',
  'id' : 'example'
};

//Connect to the Vizibles platform
var cloud = require('Vizibles').init(Serial2, function (d) {
   cloud.connect(vz-options, null, connected);   
});  

//Define some functions to be called from the cloud
var lightOn = function(d) {
  //Turn on the LED
  digitalWrite(LED2,1);
  //Publish the change to the cloud
  cloud.update({status : 'on'});
};
var lightOff = function(d) {
  //Turn off the LED
  digitalWrite(LED2,0);
  //Publish the change to the cloud
  cloud.update({status : 'off'});
};

//publish those functions once connected
var connected = function(d) {
 cloud.expose('lightOn', lightOn, function(d){
   if(d=='Ok'){
     cloud.expose('lightOff', lightOff, function(d){
       if(d!='Ok'){
         connected();
       }
     });
   } else {
     connected();
   }
});

Cubitic.io

cubitic.io is a predictive analytics platform for IoT.

They're in private beta at the moment, so drop them an e-mail if you want to experiment with their service.

var CUBITIC = {
  APPID : YOUR_APP_ID,
  TOKEN : YOUR_TOKEN
};

function putCubitic(event, data) {
  content = JSON.stringify(data);
  var options = {
    host: 'api.cubitic.io',
    port: '80',
    path:'/v1/event/'+event,
    method:'POST',
    headers: {
      "Content-Type":"application/json",
      "cubitic-appid":CUBITIC.APPID,
      "Authorization":"Bearer "+CUBITIC.TOKEN,
      "Content-Length":content.length
    }
  };
  require("http").request(options, function(res)  {
    var d = "";
    res.on('data', function(data) { d+= data; });
    res.on('close', function(data) {
      console.log("Closed: "+d);
    });
  }).end(content);
}

function getCubitic(event, callback) {
  var options = {
    host: 'api.cubitic.io',
    port: '80',
    path:'/v1/event/'+event,
    method:'GET',
    headers: {
      "cubitic-appid":CUBITIC.APPID,
      "Authorization":"Bearer "+CUBITIC.TOKEN
    }
  };
  require("http").request(options, function(res)  {
    var d = "";
    res.on('data', function(data) { d+= data; });
    res.on('close', function(data) {
      var j = JSON.parse(d);
      if (callback) callback((j&&j.result)?j.result:undefined);
    });
  }).end();
}

// Send data...
putCubitic("TemperatureMeasured",
     {
      "value": E.getTemperature(),
      "units": "C",
      "location" : {
        "lat": 51.652,
        "long": -1.268
      }
     });

Dweet.io

Ridiculously simple messaging (and alerts) for the Internet of Things.

Dweet is like a really easy to use Twitter. Post messages, and then get the latest 'dweet' or stream updates. The free version has no security (but also no signup process!) - for prototyping where you want to communicate with devices without running a server it's great.

// Espruino 1v81 and later don't need this function
function encodeURIComponent(s) {
  var ok = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_.~";
  var r = "";
  for (var i=0;i<s.length;i++) {
    if (ok.indexOf(s[i])>=0) r+=s[i];
    else r+= "%"+(256+s.charCodeAt(i)).toString(16).toUpperCase().substr(-2);
  }
  return r;
}

function putDweet(dweet_name, a, callback) {
  var data = "";
  for (var n in a) {
    if (data.length) data+="&";
    data += encodeURIComponent(n)+"="+encodeURIComponent(a[n]);
  }
  var options = {
    host: 'dweet.io',
    port: '80',
    path:'/dweet/for/'+dweet_name+"?"+data,
    method:'POST'
  };
  require("http").request(options, function(res)  {
    var d = "";
    res.on('data', function(data) { d+=data; });
    res.on('close', function(data) {
      if (callback) callback(d);
    });
 }).end();
}

function getDweet(dweet_name, callback) {
  require("http").get('dweet.io/get/latest/dweet/for/'+dweet_name, function(res)  {
    var d = "";
    res.on('data', function(data) { d+=data; });
    res.on('close', function(data) {
      var j = JSON.parse(d);
      if (callback) callback((j&&j.with&&j.with.length)?j.with[0].content:undefined);
    });
 });
}

putDweet("espruino", {hello:"world2"}, function(response) {
  console.log(response);
});
// read with http://dweet.io/get/latest/dweet/for/espruino

// and getting latest:
getDweet("espruino", console.log);

Xively

Xively lets you push data, and provides a nice site where you can view graphs of your information, manage devices, and add HTTP POST requests that will be made when a condition occurs.

You can get the relevant ID and API key by creating an account with them and adding a device. The details you need are displayed down the right-hand side.

var XIVELY = {
  ID : YOUR_FEED_ID,
  APIKEY : "YOUR_API_KEY"
};

function putXively(a, callback) {
    var data = {
     version : "1.0.0",
     datastreams : []
    };
    for (var i in a)
      data.datastreams.push({id:i, current_value:a[i]});
    content = JSON.stringify(data);
    var options = {
      host: 'api.xively.com',
      port: '80',
      path:'/v2/feeds/'+XIVELY.ID,
      method:'PUT',
      headers: { "X-ApiKey": XIVELY.APIKEY, "Content-Length":content.length }
    };
    var req = require("http").request(options, function(res)  {
      var d = "";
      res.on('data', function(data) { d += data; });
      res.on('close', function(data) {
        if (callback) callback(data);
      });
     });
    req.end(content);
}

putXively({ humidity : 0.5, temperature : 25 });

IFTTT - If This Then That

IFTTT lets you make recipes of the form 'if this happens then do that'. They have a Maker Channel now, which means you can trigger loads of random stuff (tweeting, emails, etc) to happen on the net really easily

To use it:

• Go to IFTTT and make an account
• Go to https://ifttt.com/maker, enable it, copy your secret key and put it in the code below.
• Create a recipe, click this and choose Maker, then Receive a web request
• Put button_pressed as the event name
• Click that and choose whatever you want to happen
• Make sure you click all the way through the options to enable your recipe

var IFTTTKEY = "...";

function sendEvent(event, callback) {
  require("http").get("http://maker.ifttt.com/trigger/"+event+"/with/key/"+IFTTTKEY, function(res) {
    var d = "";
    res.on('data', function(data) { d += data; });
    res.on('close', function() {
      if (callback) callback(d);
    });
  });
}

sendEvent("button_pressed");

Using Espruino as the 'that' in 'if this then that' is more difficult at the moment. IFTTT expects to send an HTTP POST request to a web server, which means that you'd have to expose your Espruino to the internet (by configuring your broadband router to forward connections to it). You could however get IFTTT to make a request to Dweet (see above), which you could then poll using Espruino.

Google Sheets / Google Forms

There is a tutorial on this here

This is currently only possible on the Espruino Pico board, because HTTPS communications are needed.