Issue using the ArduinoMqttClient.h library

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1

Hello guys, I'm curretnly trying to write data from an Arduino Uno WiFi Rev2 to MQTT. The problem is that my broker requires an username and password to connect to it. I'm using the ArduinoMqttClient.h library and can't find how to configurate an username.

GitHub - arduino-libraries/ArduinoMqttClient: ArduinoMqttClient Library for Arduino

My program :
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#include <ArduinoMqttClient.h>
#include <WiFiNINA.h>
//#include "arduino_secrets.h"

///////please enter your sensitive data in the Secret tab/arduino_secrets.h
const char ssid[] = "xx"; // your network SSID (name)
const char pass[] = "xx"; // your network password (use for WPA, or use as key for WEP)

WiFiClient wifiClient;
MqttClient mqttClient(wifiClient);

const char broker[] = "xx";
int port = 1883;
const char topic[] = "xx";
const char topic2[] = "xx";
const char topic3[] = "xx";

//set interval for sending messages (milliseconds)
const long interval = 8000;
unsigned long previousMillis = 0;

int count = 0;

void setup() {
//Initialize serial and wait for port to open:
Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect. Needed for native USB port only
}

// attempt to connect to Wifi network:
Serial.print("Attempting to connect to WPA SSID: ");
Serial.println(ssid);
while (WiFi.begin(ssid, pass) != WL_CONNECTED) {
// failed, retry
Serial.print(".");
delay(5000);
}

Serial.println("You're connected to the network");
Serial.println();

Serial.print("Attempting to connect to the MQTT broker: ");
Serial.println(broker);

if (!mqttClient.connect(broker, port)) {
Serial.print("MQTT connection failed! Error code = ");
Serial.println(mqttClient.connectError());

while (1);

}

Serial.println("You're connected to the MQTT broker!");
Serial.println();
}

void loop() {
// call poll() regularly to allow the library to send MQTT keep alive which
// avoids being disconnected by the broker
mqttClient.poll();

unsigned long currentMillis = millis();

if (currentMillis - previousMillis >= interval) {
// save the last time a message was sent
previousMillis = currentMillis;

//record random value from A0, A1 and A2
int Rvalue = analogRead(A0);
int Rvalue2 = analogRead(A1);
int Rvalue3 = analogRead(A2);

Serial.print("Sending message to topic: ");
Serial.println(topic);
Serial.println(Rvalue);

Serial.print("Sending message to topic: ");
Serial.println(topic2);
Serial.println(Rvalue2);

Serial.print("Sending message to topic: ");
Serial.println(topic2);
Serial.println(Rvalue3);

// send message, the Print interface can be used to set the message contents
mqttClient.beginMessage(topic);
mqttClient.print(Rvalue);
mqttClient.endMessage();

mqttClient.beginMessage(topic2);
mqttClient.print(Rvalue2);
mqttClient.endMessage();

mqttClient.beginMessage(topic3);
mqttClient.print(Rvalue3);
mqttClient.endMessage();

Serial.println();

}
}
</>

2

Please follow the advice given in the link below when posting code, in particular the section entitled 'Posting code and common code problems'

Use code tags (the </> icon above the compose window) to make it easier to read and copy for examination

3

Have you looked at the examples that come with the library ?

  // You can provide a username and password for authentication
  // mqttClient.setUsernamePassword("username", "password");