MKR WiFi 1010

#include <QubitroMqttClient.h>
#include <WiFiNINA.h> 

WiFiClient wifiClient;
QubitroMqttClient mqttClient(wifiClient);

char deviceID[] = "PASTE_DEVICE_ID_HERE";
char deviceToken[] = "PASTE_DEVICE_TOKEN_HERE";
char host[] = "_IP_";
int port = 1883;

void setup() 
{
  
  mqttClient.setId(deviceID);
   
  mqttClient.setDeviceIdToken(deviceID, deviceToken);

  Serial.println("Connecting to Qubitro...");

  if (!mqttClient.connect(host, port)) 
  {
    Serial.println("Connection failed! Error code = ");
    Serial.println(mqttClient.connectError());
    Serial.println("Visit docs.qubitro.com or create a new issue on github.com/qubitro");
    while (1);
  }
  
  Serial.println("Connected to the Qubitro !");

  mqttClient.subscribe(deviceID);

  mqttClient.onMessage(receivedMessage);    
                                      
}

void loop() 
{
   mqttClient.poll();   
   mqttClient.beginMessage(deviceID);   
   mqttClient.print("{\"Temp\":33}");
   mqttClient.endMessage();                
   delay(2000);   //wait 2 seconds
}

void receivedMessage(int messageSize) 
{
  Serial.print("New message received:");
  while (mqttClient.available()) 
  {
    Serial.print((char)mqttClient.read());
  }
  Serial.println();
}

Connecting to WiFi...
Connected to the WiFi
Connecting to Qubitro...
Connected to the Qubitro !
New message received:{"Temp":33}
New message received:{"Temp":33}
New message received:{"Temp":33}