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yes, I will try that.

my carriots module is here:
https://github.com/afitterling/Espruino-Modules/blob/develop/carriots.js

I rewritten things entirely from scratch.... also with use of promises.
However, the error still occurs...
My question is whether the SIM900 receives the response string as a whole?
In the JSON response I see a AT-Command-Response (+RECEIVE,0,940:) in middle of the string.
Can this be a problem? I do not see the end of the JSON-String, so my assumption is the missing characters were subtracted by the length of the AT-Response in middle.
Can I fix this myself?

$http(sampleGetReq).then(function(data){
: // success
: console.log('success', data);
:});
={ }

OK

0, CONN
ECT OK

0, S
END OK

+RECEIVE,0,
1380:
HTTP/1.1 200 OK
Date: Thu, 28 Jul 2016 22:25:00 GMT
Content-Type: application/vnd.carriots.v2+json; charset=utf-8
Connectio
n: close
Server: Carriots REST API
Cache-Control: no-cache
Allow: GET, POST
Access-Control-Allow-Origin: *
Access-Control-Allow-Credentials: true
Access-Control-Expose-Headers: Date,Server,Allow,Connection,Content-Length,Content-Type,Cache-Control
{"total_documents"
:6,"result":[{"_id":"579842a25c5d7550425376e3","protocol":"v2","checksum":"","_t":"str","at":1469596322,"device":"Commander@afitterling.afitterling","data":{"time":1,"cycle":1},"id_developer":"185c0dde8b7c9df29d122b25d85fce1c26ad7645ed021f5c611fe4115132f4f8@afitterling.afitterling","created_at":1469596322,"owner":"afitterling"},{"_id":"579842ae5c5d752b45537679","protocol":"v2","checksum":"","_t":"str","at":1469596334,"device":"Commander@afitterling.afitterling","data":{"time":1,"cycle":1},"id_developer":"6c49c7f8cae5845cacd060ff93edb189517f691a47dbe4817a831869d3f
e8ca7@afitterling.afitterling","created_at":1469596334,"owner":"afitterling"},{"_id":"579842b85c5d75e1425376cc","protocol":"v2","checksum":"","_t":"str","at":1469596344,"device":"Commander@afitterling.afitterling","data":{"time":1,"cycle":1},"id_developer":"91df2481ae379b2c25fc485c6de961efea091aab3a4823853a17a22cd1feac52@afitterling.afitterling","created_at":1469596344,"owner":"afitterling"},{"_id":"579842d
+RECEIVE,0,940:
95c5d7599295379f1","protocol":"v2","checksum":"","_t":"str","at":1469596377,96387,"d
evice":"Commander@afitterling.afitterling","data":{"timex":1,"cylce":1},"id_developer":"20ed81b80c70b058cff3d1f339d8558cc00fc1dbf32fd193bde61b83c0185f72@afitterling.afitterling","created_at":1469596387,"owner":"afitterling"},{"_id":"579842f05c5d7550425376ea","protocol":"v2","checksum":"","_t":"str","at":1469596400,"device":"Commander@afitterling.afitterling","data":{"timex":1,"cylce":1},"iddeveloper":"a281efa90907e5e8ff7f6a4fe1afadcd23e746a717a8b7610ab459f8ab538258@afitterling.afitterling","created

0, CLOS
ED

the next call then will get stuck then.

kind regards,
Alex

-

Sorry, I have forgotten to reply. I switched to the SIM900 lately and did not go anyfurther. I will take your recommendations into account. kind regards, Alex

ups... I forgot to post the requests...

1.post(device, {xyz: 1})
2.getJobs()

I chain it:
getJobs(function(){ post(.....) }, function(){ // error })

All I do is run the below calls .... one after another it works as expected over 1.5 hour ... even chaining them via callback.

Then once I start resetting the SIM900 (my own reset) wich completely switches the SIM900 off and back on.

The first request (getJobs) will fail repeatedly.

// template for this device
var device1 = {
    protocol: "v1",
    checksum: "",
    device: "defaultDevice@xyz",
    at: "now",
    data: {}
};

function post(template, payload, fn, fne) {
  template.data = payload;
  content = JSON.stringify(template);
  var options = {
    host: 'api.carriots.com',
    path: '/status',
    port: '80',
    method:'POST',
    headers: {
      "carriots.apiKey": "aaaaaaaaaaaaaaaaa",
      "Content-Type": "application/json",
      "Content-Length": content.length
    }
  };
  var req = require("http").request(options, function(res)  {
    var d = "";
    res.on('data', function(data) { d+= data; });
    res.on('error', function(data) {
      console.log('error', data);
      if (fne){
        return fne();
      }
    });
    res.on('close', function(data) {
      var obj = JSON.parse(d);
        if (fn){
          return fn(obj);
        }
    });
  }).end(content);
}

the calls are done like:

function getJobs(fn, fne) {
  var options = {
    host: 'api.carriots.com',
    path: '/streams/?device=Commander@mydevice',
    port: '80',
    method:'GET',
    headers: {
      "carriots.apiKey": "key",
      "Content-Type": "application/json"
    }
  };
  var req = require("http").request(options, function(res)  {
    var d = "";
    res.on('data', function(data) { d+= data; });
    res.on('error', function(data) {
      console.log('error', data);
      if (fne){
        return fne();
      }
    });
    res.on('close', function() {
      var obj = JSON.parse(d);
      if (fn){
        return fn(obj);
      }
      console.log('req closed');
    });
  }).end();
}

I have an SIM900 wich is Arduino compatible. As I know the Arduino has a RST-Pin I connected the appropriate SIM900 one to B4 on espruino.

@Gordon I reset the SIM900 with a relais. I really switch it off and back on. After that the uplink (refresh IP) works... but not the requests. they will fail with above errors. Should I initialize something I forgot about?
When is the gprs.reset() to be used? I could not bring my SIM900 online if I only use reset with callback. I really had to restart it by withdrawing power and put it back on.

I try one guess... Could it be related to the fact, I applied a success callback on my own func within getIP (SIM900). This callback does not get executed in the SIM900 before the final statement?

Of course I do deserializing pass an object to the callback : - >

Excuse me this issue may not be SIM900 related, which performs quite good with the module... see my fix below:

Whenever I reset my SIM900 (switch it totally off) and would run a JSON-Request after reset it throws this kind of error, even I am online:

req start
Closed: undefined
Uncaught SyntaxError: Got ID:total_documents expected ':'
at line 3 col 3
{"total_documents":0,"result"l_documents":0,"result":""}:""}
^
in function called from system

However when I first doing a request with a non JSON result say the hello-request with a text result. The consecutive calls with JSON will NOT fail.

If someone has a hint, please tell me. kind regards, Alex

-deleted-

I think, the AT-Module must lock AT commands until they responded properly. I overthought it at this level.

Another thing (maybe offtopic) After a certain time the requests also do not get through I get the error:

Uncaught Error: No free sockets.
at line 1 col 306
...ew Error('No free sockets.');return socks[a]='Wait',sockData...

when is the netcallback.create to be called in SIM900?

I will try. I didn't know I could use promises on the espruino. great.

I really think each programmer should know this. We're dealing on a very low level on that hardware. Everyone has to be careful how he deals with it.... So I would say, not for sure the module needs to handle it.

I have to think about it.

In my case I was just receiving the IP-Adress from the SIM900 on timeinterval with a special AT-command (not with the SIM900 code). At the time this command did not resond properly, and I started the request, it got mixed up and the request failed with above error. Now as solution I do one operation at a time.

I prevent status requests on that hw, when I am aware I need to make a request. I personally gave the last one the higher priority.

I think it is not a problem with the SIM900 code. It is regarded, how AT commands get executed at the modem. I can reproduce this, when I run shortly after another two command, awaiting replies from the modem. e.g.: isOnline(); networkTasks() (my own code)
If avoiding this so called "concurrent" - in JS-Terms better say, overlapping operations - it might be fixed. However the hardware cannot not deal with the commands in a concurrent mode. So each has to be send at a time and pseudo-synchronously should receive its result, before proceeding to the next one.

req start
=undefined
error request
Uncaught Error: CIPSTART failed.
 at line 1 col 68
...ew Error('CIPSTART failed.');at.registerLine(a+', CONNECT OK...
                              ^
in function "a" called from line 1 col 31
c=undefined;var d;if(a&&(d=a(g))?(c=h,a=d):clearTimeout(j),c...
                              ^
in function "c" called from line 1 col 331
...e&&(d[e](i),j=!0);j||c&&c(i);}if(a=a.substr(f+h.length),a[0]...

good thread thank you

I could successfully switch a HM-10 BLE Device with the 5LN01SP (using a IOPin for Gate). However only with VBAT to source (Espruino was hooked up with USB => 4,5V?). the 3.3V pin does not work, when switching with a IO-Pin at Gate. the current seems not high enough. Is there a way to use 3.3V, e.g. use two MOSFETS in parallel?

-

thank you so much to all of you.

Everyone,

I am struggling with my Waveshare GSM-Module to establish M2M communication (http://www.waveshare.com/wiki/GSM/GPRS/GPSShield%28B%29).

There're two serial ports on this device. The GSM-Shield itself and some separate connections for the SIM808 to connect directly to it. However I could not get it to work. Even on Arduino.

Has anyone done this before? Does anyone use this module?

kind regards,
Alex

@Ducky - thank you.
@DrAzzy
what means low current, I calculate it at about maximum 8mA. Is that low current? It is a HM-10/11. kind regards,
Alex

the USB.setConsole seems not be available anymore? Does anyone know why?