Publish Any Event to Wia Using Your MKR GSM 1400

#include <ArduinoHttpClient.h>
#include <MKRGSM.h>
#include <ArduinoJson.h>

// PIN Number
const char PINNUMBER[]     = ""; //blank if no pin
// APN data: check settings on mobile for sim provider or contact carrier for network settings
const char GPRS_APN[]      = "";
const char GPRS_LOGIN[]    = "";
const char GPRS_PASSWORD[] = "";

// get this from the wia dashboard. it should start with `d_sk`
const char* device_secret_key = "your-device-seccret-key";

GSMClient client;
GPRS gprs;
GSM gsmAccess;

// Wia API parameters
char server[] = "api.wia.io";
char path[] = "/v1/events";
int port = 80;


StaticJsonBuffer<512> jsonBuffer;
HttpClient httpClient = HttpClient(client, server, port);
JsonObject& root = jsonBuffer.createObject();
String response;
int statusCode = 0;
String dataStr;
void setup() {
  // initialize serial communications and wait for port to open:
  Serial.begin(9600);
  while (!Serial) {
    ; // wait for serial port to connect. Needed for native USB port only
  }

  Serial.println("Starting GSM connection to Wia!.");
  // connection state
  boolean connected = false;

  // After starting the modem with GSM.begin()
  // attach the shield to the GPRS network with the APN, login and password
  while (!connected) {
    if ((gsmAccess.begin(PINNUMBER) == GSM_READY) &&
        (gprs.attachGPRS(GPRS_APN, GPRS_LOGIN, GPRS_PASSWORD) == GPRS_READY)) {
      connected = true;
    } else {
      Serial.println("Not connected");
      delay(1000);
    }
  }

  Serial.println("connecting...");
  // if you get a connection, report back via serial:
  if (client.connect(server, port)) {
    Serial.println("connected");
  } else {
    // if you didn't get a connection to the server:
    Serial.println("connection failed");
  }
}

void loop() {
  root["name"] = "temperature";
  root["data"] = 21.5;

  // if you get a connection, report back via serial:
  if (client.connect(server, port)) {

    postToWia(root);

  } else {
    // if you didn't get a connection to the server:
    Serial.println("connection failed");
  }
  // read the status code and body of the response
  statusCode = httpClient.responseStatusCode();
  response = httpClient.responseBody();

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

  delay(3000); // Wait for 3 seconds to post again
}

void postToWia(JsonObject& data) {
  data.printTo(dataStr);
  httpClient.beginRequest();
  httpClient.post(path);
  httpClient.sendHeader("Content-Type", "application/json");
  httpClient.sendHeader("Content-Length", data.measureLength());
  httpClient.sendHeader("Authorization", "Bearer "  + String(device_secret_key));
  httpClient.beginBody();
  httpClient.print(dataStr);
  httpClient.endRequest();

}