IFTTT POST call failing with Return Code = -2 with WiFiSSLClient

[adriens]

Hi,

Your library perfectly matches my needs to POST on IFTTT, I'm connecting thtrough WiFiSSLClient and have imported certificates :

I can successfuly post from curl but no way to make it run from mkr1000, always returning -2 return code :

SSID: BABYLON
IP Address: 192.168.1.32
making POST request
Status code: -2
Response: 
Wait five seconds
making POST request

char serverAddress[] = HOSTIFTTT;  // server address
int port = 443;

WiFiSSLClient wifi;
HttpClient client = HttpClient(wifi, serverAddress, port);
int status = WL_IDLE_STATUS;

Here is the loop source code in case it can help :

void loop() {
  Serial.println("making POST request");
  String contentType = "application/json";
  String postData = "{\"key1\": \"toto\"}";

  client.post("/trigger/test/with/key/MYPRIVATEKEY", contentType, postData);

  // read the status code and body of the response
  int statusCode = client.responseStatusCode();
  String response = client.responseBody();

  Serial.print("Status code: ");
  Serial.println(statusCode);
  Serial.print("Response: ");
  Serial.println(response);

  Serial.println("Wait five seconds");
  delay(5000);
}

I just can't figure out what's wrong with my code 😿

ANy help would be greatly appreciated 🙏

[adriens]

According to source code, I'm not using the library the good way :

// This call was made when the HttpClient class wasn't expecting it
// to be called.  Usually indicates your code is using the class
// incorrectly

[adriens]

Here is the full sketch :

/*
  Simple POST client for ArduinoHttpClient library
  Connects to server once every five seconds, sends a POST request
  and a request body

  created 14 Feb 2016
  modified 22 Jan 2019
  by Tom Igoe

  this example is in the public domain
 */
#include <ArduinoHttpClient.h>
#include <WiFi101.h>
#include "arduino_secrets.h"

///////please enter your sensitive data in the Secret tab/arduino_secrets.h
/////// Wifi Settings ///////
char ssid[] = SECRET_SSID;
char pass[] = SECRET_PASS;

char serverAddress[] = HOSTIFTTT;  // server address
int port = 443;

WiFiSSLClient wifi;
HttpClient client = HttpClient(wifi, serverAddress, port);
int status = WL_IDLE_STATUS;

void setup() {
  Serial.begin(9600);
  while ( status != WL_CONNECTED) {
    Serial.print("Attempting to connect to Network named: ");
    Serial.println(ssid);                   // print the network name (SSID);

    // Connect to WPA/WPA2 network:
    status = WiFi.begin(ssid, pass);
  }

  // print the SSID of the network you're attached to:
  Serial.print("SSID: ");
  Serial.println(WiFi.SSID());

  // print your WiFi shield's IP address:
  IPAddress ip = WiFi.localIP();
  Serial.print("IP Address: ");
  Serial.println(ip);
}

void loop() {
  Serial.println("making POST request");
  String contentType = "application/json";
  String postData = "{\"key1\": \"toto\"}";

  client.post("/trigger/test/with/key/MYPRIVATEKEY", contentType, postData);

  // read the status code and body of the response
  int statusCode = client.responseStatusCode();
  String response = client.responseBody();

  Serial.print("Status code: ");
  Serial.println(statusCode);
  Serial.print("Response: ");
  Serial.println(response);

  Serial.println("Wait five seconds");
  delay(5000);
}

[adriens]

Same behavior with DweetPost code

[adriens]

Maybe is it linked to https://github.com/arduino-libraries/ArduinoHttpClient/issues/29 ?

[adriens]

ALso, my server address is

#define HOSTIFTTT "maker.ifttt.com"

[facchinm]

@Rocketct can you try to reproduce the issue?

[adriens]

I can play any code you want also on my side.

[adriens]

Here is the curl command :

[adriens]

Hi guys, any chance to get a hint for this week-end ? 🙏

[mceraso]

I dont know if this helps but see if removing the "{" and "}" from postData helps.. for some reason it stopped my application from posting properly.. from what i understand you're telling the server to parse your data as a JSON with the content-type header field so you dont need to format the data with the JSON curly braces

[adriens]

Hi @mceraso , thanks for the idea. Unfortulanely, it did not work 😿 Do you have any running code snippet that run on your side ?

[adriens]

In the README I can see :

means it will work with WiFiClient, EthernetClient and GSMClient.

... so, does it support WiFiSSLClient ❔

[adriens]

Found this : https://github.com/arduino-libraries/ArduinoHttpClient/issues/56

[adriens]

And this : https://github.com/arduino-libraries/ArduinoHttpClient/issues/13

[adriens]

It seems like it does but no way to make it run actually...

[mceraso]

Here's the code that works for me - i'm posting a matrix of data to an endpoint. I realize that I don't know about SSL and dont think that I'm using it. I'm using WifiNINA to create the client

/*
  Simple POST client for ArduinoHttpClient library
  Connects to server once every five seconds, sends a POST request
  and a request body

  created 14 Feb 2016
  modified 22 Jan 2019
  by Tom Igoe

  this example is in the public domain
 */
#include <ArduinoHttpClient.h>
#include <WiFiNINA.h>
#include "arduino_secrets.h"

///////please enter your sensitive data in the Secret tab/arduino_secrets.h
/////// Wifi Settings ///////
char ssid[] = SECRET_SSID;
char pass[] = SECRET_PASS;

char serverAddress[] = "xxx.xxx.x.x";  // server address
int port = 3000;
const int data_len = 10;               // number of data points to test
unsigned long raw_data[data_len][2];   // initialize matrix of data

WiFiClient wifi;
HttpClient client = HttpClient(wifi, serverAddress, port);
int status = WL_IDLE_STATUS;

void setup() {
  Serial.begin(9600);
  while ( status != WL_CONNECTED) {
    Serial.print("Attempting to connect to Network named: ");
    Serial.println(ssid);                   // print the network name (SSID);

    // Connect to WPA/WPA2 network:
    status = WiFi.begin(ssid, pass);
  }

    //Initialize raw_data
  for (int i = 0; i < data_len; i++) {
    raw_data[i][0] = 100 * i; //1pix/10ms*1000ms/1s //test the timing of this to better understand
    raw_data[i][1] = i;
  }

  // print the SSID of the network you're attached to:
  Serial.print("SSID: ");
  Serial.println(WiFi.SSID());

  // print your WiFi shield's IP address:
  IPAddress ip = WiFi.localIP();
  Serial.print("IP Address: ");
  Serial.println(ip);
}

void loop() {
  Serial.println("making POST request");
  String contentType = "application/json";
  String postData = "[";                    //don't use JSON {} format. contentType tells the API to parse your txt as JSON
  for (int i = 0; i < data_len; i++) {
      postData += "[";
      postData += raw_data[i][0];
      postData += ", ";
      postData += raw_data[i][1];
      postData += "]";
      if (i < data_len - 1){
        postData += ",";
      }
    }
    postData += "]";

  client.post("/data", contentType, postData);

  // read the status code and body of the response
  int statusCode = client.responseStatusCode();
  String response = client.responseBody();

  Serial.print("Status code: ");
  Serial.println(statusCode);
  Serial.print("Response: ");
  Serial.println(response);

  Serial.println("Wait ten seconds");
  delay(10000);
}

[adriens]

Looks interesting, do you have a MKR1000 ? The spec (https://www.arduinolibraries.info/types/official) show the following compatibility matrix :

[mceraso]

Ahh, I see you're using an MKR1000. Right now I'm using an UNO Wifi Rev.2 but will be getting a MKR1010 next month

[adriens]

@mceraso : I will buy a arduino-yun-rev-2 so I'll get Python support and a minimalist OS (openwrt) : it should make things much much easier. I'm tired to writing so much code just for a get request ...

[sandeepmistry]

Hi @adriens,

I'm able to reproduce this, the issue is with the WINC1500, it's failing to connect to the "maker.ifttt.com" server even though the cert if flash for it (might be related to the TLS cipher negotiation). I'll open an issue on the WiFi101 repo for this.

One note, client.post("/trigger/test/with/key/MYPRIVATEKEY", contentType, postData) is returning -1 to indicate a HTTP_ERROR_CONNECTION_FAILED error, in the successful connection case 0 would be returned (HTTP_SUCCESS).

[adriens]

Great news to know it can reproduce it. First step for better news. Thank you very much 💟 @sandeepmistry

[c0dehunter]

I am having the same issue. I am using GsmClient to build http client and also not IFTTT but my own server. Also, I am using .get() not .post().

[Rocketct]

the original one was fixed by https://github.com/arduino-libraries/WiFi101/pull/274, @c0dehunter could you try this and check if still not works? if not works could you open a new issue with a description and a sketch to reproduce the problem?

[adriens]

Hi @Rocketct , I'll do so, if not working, I'll open a new issue so the current one can be closed : do you want me to close it now ?

[Rocketct]

no no @adriens i'll do it don't worry, only lets wait the resposne of @c0dehunter, thank you a lot @adriens

[Rocketct]

fixed by https://github.com/arduino-libraries/WiFi101/pull/274 @c0dehunter if you need open new issue.

[adriens]

👏 😻 🚀