iot.md

title	description	ms.date	ms.topic	ms.devlang	ms.service
Azure IoT SDK for Java	Reference for Azure IoT SDK for Java	05/15/2024	reference	java	iot

Azure IoT libraries for Java

Connect, monitor, and control Internet of Things assets with Azure IoT Hub.

To get started with Azure IoT Hub, see Connect your device to your IoT hub using Java.

IoT Service library

Register devices and send messages from the cloud to registered devices using the IoT Service library.

Add a dependency to your Maven pom.xml file to use the client library in your project.

<dependency>
    <groupId>com.microsoft.azure.sdk.iot</groupId>
    <artifactId>iot-service-client</artifactId>
    <version>1.6.23</version>
</dependency>

IoT Device library

Send messages to the cloud and receive messages on devices using the IoT Device library.

Add a dependency to your Maven pom.xml file to use the client library in your project.

<dependency>
    <groupId>com.microsoft.azure.sdk.iot</groupId>
    <artifactId>iot-device-client</artifactId>
    <version>1.3.31</version>
</dependency>

[!div class="nextstepaction"] Explore the Client APIs

Example

Send a message from Azure IoT Hub to a device.

Message messageToSend = new Message(messageText);
messageToSend.setDeliveryAcknowledgement(DeliveryAcknowledgement.Full);
messageToSend.setMessageId(java.util.UUID.randomUUID().toString());

// set message properties
Map<String, String> propertiesToSend = new HashMap<String, String>();
propertiesToSend.put(messagePropertyKey,messagePropertyKey);
messageToSend.setProperties(propertiesToSend);

CompletableFuture<Void> future = serviceClient.sendAsync(deviceId, messageToSend);
try {
    future.get();
}
catch (ExecutionException e) {
    System.out.println("Exception : " + e.getMessage());
}

Samples

IoT Device samples
IoT Service samples

Explore more sample Java code for Azure IoT you can use in your apps.