How do you configure MQTTClient with userName and password?

[DieterHolz]

I try to connect to a MQTT Broker with username/password authentication but I can't get the MQTTClient to connect.

Calling client.run() throws

Exception in thread "main" io.github.davidepianca98.socket.IOException: Connection reset
at io.github.davidepianca98.socket.tcp.Socket.readToBuffer(Socket.kt:70)
at io.github.davidepianca98.socket.tcp.Socket.read--5HJl4c(Socket.kt:75)
at io.github.davidepianca98.ClientSocket.read--5HJl4c(ClientSocket.kt:40)
at io.github.davidepianca98.MQTTClient.check(MQTTClient.kt:389)
at io.github.davidepianca98.MQTTClient.step(MQTTClient.kt:466)
at io.github.davidepianca98.MQTTClient.run(MQTTClient.kt:476)

[DieterHolz]

With HiveMQ MQTT Client I get a connection by doing this:

client = Mqtt5Client.builder()
.serverHost(mqttBroker)
.identifier(UUID.randomUUID().toString())
.sslWithDefaultConfig()
.simpleAuth()
.username(username)
.password(UTF_8.encode(password))
.applySimpleAuth()
.serverPort(8883)
.buildAsync()

With your library I tried the following, but this fails

val client = MQTTClient(
    MQTTVersion.MQTT5,
    mqttBroker,
    8883,
    null,
    userName = username,
    password = password.encodeToByteArray().toUByteArray(),
    onConnected = {
        println("connected")

    }
) {
    println(it.topicName)
    println(it.payload?.toByteArray()?.decodeToString())
}

[Uplyuz]

We are also trying to connect to HiveMQ using this library, any updates on this issue?

[davidepianca98]

Hello, it looks like you are setting the TLSSettings to null and port 8883 which usually is used for TLS connections unless configured differently. Can you please take a look and make sure you are providing the required TLS parameters to connect? You can find a simple example here https://github.com/davidepianca98/KMQTT?tab=readme-ov-file#tls-code-example