A Kotlin Multiplatform, coroutine-based MQTT client library

Dependencies

implementation("it.nicolasfarabegoli:mktt:<version>")

or using Gradle catalogs:

[versions]
mktt-version = "<version>"

[dependencies]
mktt = { module = "it.nicolasfarabegoli:mktt", version.ref = "mktt-version" }

Examples

Publishing

val mqttClient = MkttClient(Dispatchers.IO) {
    brokerUrl = "localhost"
    port = 1883
    clientId = "mktt-client"
}
mqttClient.connect()
mqttClient.publish(
    topic = "test/topic",
    qos = MqttQoS.ExactlyOnce,
    "hello world".encodeToByteArray(),
)
mqttClient.disconnect()

Subscribing

val mqttClient = MkttClient(Dispatchers.IO) {
    brokerUrl = "localhost"
    port = 1883
    clientId = "mktt-client"
}
mqttClient.connect()
mqttClient.subscribe("test/topic", MqttQoS.ExactlyOnce).collect {
    println("Received message: ${it.payload.decodeToString()}")
}
mqttClient.disconnect()

Supported Platforms

Platform	Target	Description	Supported
JVM	jvm()	Java Virtual Machine (backend, desktop apps)	✅
Android	android()	Native Android development	✅
iOS	ios(), iosArm64(), iosX64(), iosSimulatorArm64()	Apple iOS devices (real & simulator)	❌
macOS	macosX64(), macosArm64()	macOS applications	❌
watchOS	watchosX64(), watchosArm64(), watchosSimulatorArm64()	Apple Watch apps	❌
tvOS	tvosX64(), tvosArm64(), tvosSimulatorArm64()	Apple TV apps	❌
Linux	linuxX64(), linuxArm64(), linuxArm32Hfp()	Linux native applications	❌
Windows	mingwX64()	Windows native applications	❌
Web	js()	JavaScript (both browser & Node.js)	✅
Wasm	wasmJs(), wasmWasi()	WebAssembly (browser & standalone)	❌

License

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

See the LICENSE file for more details.