Assistance Required in Connecting Robot to IoT Central with Specific Project Settings #1735

AlanPintor-git · 2023-08-15T16:48:19Z

Dear IoT Team,

I am encountering challenges while attempting to integrate a robot with IoT Central. This is a critical issue as it pertains to one of many units that require connection.

Project Configuration Details:

Android OS Version: 7.1
Android Studio Version: Arctic Fox
Target SDK Version: 27
Dependency: implementation 'com.microsoft.azure.sdk.iot:iot-device-client:1.29.2'

The challenges faced are as follows:

Utilizing the Android sample from Azure IoT SDK Java (https://github.com/Azure/azure-iot-sdk-java/tree/main/iothub/device/iot-device-samples/android-sample) was unsuccessful, owing to incompatibility with my project version.
Adaptation of the sample code to my project resulted in compatibility issues.
Attempts to implement chatGPT were met with errors:
- Logs from the Android app reflect a successful connection, but the device in IoT does not register as connected.
- An error was encountered when sending telemetries: //V/IoTest: Telemetry sent with status: ERROR

Would you be able to provide a sample compatible with my project configuration, or advise me on appropriate solutions?

Enclosed code snippet:

import android.util.Log;
import com.microsoft.azure.sdk.iot.device.*;
import com.microsoft.azure.sdk.iot.device.transport.IotHubConnectionStatus;
import org.json.JSONObject;

public class AzureIoTHelper {
    private DeviceClient deviceClient;

    public AzureIoTHelper(String connectionString) {
        try {
            deviceClient = new DeviceClient(connectionString, IotHubClientProtocol.HTTPS);
            deviceClient.registerConnectionStatusChangeCallback(new IotHubConnectionStatusChangeCallback() {
                @Override
                public void execute(IotHubConnectionStatus status, IotHubConnectionStatusChangeReason statusChangeReason, Throwable throwable, Object callbackContext) {
                    Log.v("IoTest", "Connection status changed to: " + status);
                }
            }, null);
        } catch (Exception e) {
            Log.v("IoTest", "Error initializing Azure IoT Central Helper: " + e.getMessage());
        }
    }

    public void iotConnect() {
        try {
            deviceClient.open();
            Log.v("IoTest", "Connected to Azure IoT Central.");
        } catch (Exception e) {
            Log.v("IoTest", "Error connecting to Azure IoT Central: " + e.getMessage());
        }
    }

    public void sendTelemetries(JSONObject telemetryData) {
        try {
            Message message = new Message(telemetryData.toString());
            deviceClient.sendEventAsync(message, new EventCallback(), null);
            Log.v("IoTest", "Telemetry sent: " + telemetryData.toString());
        } catch (Exception e) {
            Log.v("IoTest", "sendTelemetries - Exception: " + e.getMessage() + ", cause: " + e.getCause());
            e.printStackTrace();
            //V/IoTest: Telemetry sent with status: ERROR
        }
    }

    private static class EventCallback implements IotHubEventCallback {
        @Override
        public void execute(IotHubStatusCode responseStatus, Object callbackContext) {
            Log.v("IoTest", "Telemetry sent with status: " + responseStatus.name());
        }
    }
}

Best Regards,
Alan

The text was updated successfully, but these errors were encountered:

timtay-microsoft · 2023-08-15T17:20:55Z

Can you share the stacktrace that you see when sending telemetry fails?

AlanPintor-git · 2023-08-16T16:04:06Z

Hi @timtay-microsoft, thanks for the following.

The Error is coming from IotHubEventCallback:

private static class EventCallback implements IotHubEventCallback {
    @Override
    public void execute(IotHubStatusCode responseStatus, Object callbackContext) {

        StackTraceElement[] stackTraceElements = Thread.currentThread().getStackTrace();
        StringBuilder stackTraceString = new StringBuilder();
        for (StackTraceElement element : stackTraceElements) {
            stackTraceString.append(element.toString()).append("\n");
        }

        Log.v("IoTest", "IotHubEventCallback >> Telemetry sent with status: " + responseStatus.name());
        Log.v("IoTest", "Current stack trace:\n" + stackTraceString);
    }
}

Error:

timtay-microsoft · 2023-08-16T16:08:09Z

Do you see any errors when using other protocols? Such as:

deviceClient = new DeviceClient(connectionString, IotHubClientProtocol.AMQPS);

or

deviceClient = new DeviceClient(connectionString, IotHubClientProtocol.MQTT);

AlanPintor-git · 2023-08-21T15:16:47Z

Hi @timtay-microsoft, thanks for the follow-up.

Yes, the error is the same for all protocols except HTTPS. The error sample below is from the MQTT protocol:

V/IoTest: Error connecting to Azure IoT Central: Could not open the connection
W/System.err: java.io.IOException: Could not open the connection
at com.microsoft.azure.sdk.iot.device.DeviceIO.open(DeviceIO.java:162)
at com.microsoft.azure.sdk.iot.device.InternalClient.open(InternalClient.java:176)
at com.microsoft.azure.sdk.iot.device.DeviceClient.open(DeviceClient.java:438)
at com.osak.csjrobotmanager.Services.AzureIoTHelper.iotConnect(AzureIoTHelper.java:40)
W/System.err: at com.osak.csjrobotmanager.Activity.MainActivity.onCreate(MainActivity.java:171)
at android.app.Activity.performCreate(Activity.java:6709)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2624)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2732)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1483)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6141)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:913)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:803)
W/System.err: Caused by: com.microsoft.azure.sdk.iot.device.exceptions.ProtocolException: Unable to establish MQTT connection
at com.microsoft.azure.sdk.iot.device.transport.mqtt.exceptions.PahoExceptionTranslator.convertToMqttException(PahoExceptionTranslator.java:46)
at com.microsoft.azure.sdk.iot.device.transport.mqtt.Mqtt.connect(Mqtt.java:136)
at com.microsoft.azure.sdk.iot.device.transport.mqtt.MqttMessaging.start(MqttMessaging.java:63)
at com.microsoft.azure.sdk.iot.device.transport.mqtt.MqttIotHubConnection.open(MqttIotHubConnection.java:277)
at com.microsoft.azure.sdk.iot.device.transport.IotHubTransport.openConnection(IotHubTransport.java:999)
at com.microsoft.azure.sdk.iot.device.transport.IotHubTransport.open(IotHubTransport.java:392)
at com.microsoft.azure.sdk.iot.device.DeviceIO.open(DeviceIO.java:158)
... 16 more
W/System.err: Caused by: MqttException (0) - javax.net.ssl.SSLHandshakeException: java.security.cert.CertPathValidatorException: Trust anchor for certification path not found.
W/System.err: at org.eclipse.paho.client.mqttv3.internal.ExceptionHelper.createMqttException(ExceptionHelper.java:38)
at org.eclipse.paho.client.mqttv3.internal.ClientComms$ConnectBG.run(ClientComms.java:736)
at java.lang.Thread.run(Thread.java:761)
Caused by: javax.net.ssl.SSLHandshakeException: java.security.cert.CertPathValidatorException: Trust anchor for certification path not found.
at com.android.org.conscrypt.OpenSSLSocketImpl.startHandshake(OpenSSLSocketImpl.java:361)
at org.eclipse.paho.client.mqttv3.internal.SSLNetworkModule.start(SSLNetworkModule.java:149)
at org.eclipse.paho.client.mqttv3.internal.ClientComms$ConnectBG.run(ClientComms.java:722)
... 1 more
Caused by: java.security.cert.CertificateException: java.security.cert.CertPathValidatorException: Trust anchor for certification path not found.
at com.android.org.conscrypt.TrustManagerImpl.checkTrustedRecursive(TrustManagerImpl.java:549)
W/System.err: at com.android.org.conscrypt.TrustManagerImpl.checkTrustedRecursive(TrustManagerImpl.java:508)
at com.android.org.conscrypt.TrustManagerImpl.checkTrusted(TrustManagerImpl.java:401)
at com.android.org.conscrypt.TrustManagerImpl.checkTrusted(TrustManagerImpl.java:375)
at com.android.org.conscrypt.TrustManagerImpl.getTrustedChainForServer(TrustManagerImpl.java:304)
at android.security.net.config.NetworkSecurityTrustManager.checkServerTrusted(NetworkSecurityTrustManager.java:94)
at android.security.net.config.RootTrustManager.checkServerTrusted(RootTrustManager.java:88)
at com.android.org.conscrypt.Platform.checkServerTrusted(Platform.java:178)
at com.android.org.conscrypt.OpenSSLSocketImpl.verifyCertificateChain(OpenSSLSocketImpl.java:596)
at com.android.org.conscrypt.NativeCrypto.SSL_do_handshake(Native Method)
at com.android.org.conscrypt.OpenSSLSocketImpl.startHandshake(OpenSSLSocketImpl.java:357)
... 3 more
Caused by: java.security.cert.CertPathValidatorException: Trust anchor for certification path not found.
... 14 more
V/IoTest: sendTelemetries - Exception: Cannot send event from an IoT Hub client that is closed., cause: null, stackTraceString: java.lang.IllegalStateException: Cannot send event from an IoT Hub client that is closed.
at com.microsoft.azure.sdk.iot.device.DeviceIO.sendEventAsync(DeviceIO.java:322)
at com.microsoft.azure.sdk.iot.device.InternalClient.sendEventAsync(InternalClient.java:216)
at com.osak.csjrobotmanager.Services.AzureIoTHelper.sendTelemetries(AzureIoTHelper.java:62)
at com.osak.csjrobotmanager.Activity.MainActivity.onCreate(MainActivity.java:177)
at android.app.Activity.performCreate(Activity.java:6709)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2624)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2732)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1483)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6141)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:913)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:803)
W/System.err: java.lang.IllegalStateException: Cannot send event from an IoT Hub client that is closed.
at com.microsoft.azure.sdk.iot.device.DeviceIO.sendEventAsync(DeviceIO.java:322)
W/System.err: at com.microsoft.azure.sdk.iot.device.InternalClient.sendEventAsync(InternalClient.java:216)
at com.osak.csjrobotmanager.Services.AzureIoTHelper.sendTelemetries(AzureIoTHelper.java:62)
at com.osak.csjrobotmanager.Activity.MainActivity.onCreate(MainActivity.java:177)
at android.app.Activity.performCreate(Activity.java:6709)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2624)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2732)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1483)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6141)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:913)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:803)

timtay-microsoft · 2023-08-21T16:03:14Z

Have you tried upgrading the SDK version to either the latest v1 release (1.34.3) or to the latest v2 release (2.2.0)?

AlanPintor-git · 2023-08-21T16:13:35Z

Yes, I am experiencing issues with Android compatibility. However, I will attempt again using the specific version(s) you recommended. I will keep you updated. Thank you.

AlanPintor-git · 2023-08-28T14:24:55Z

Hello @timtay-microsoft,

I keep encountering the same Android compatibility issues. Initially, the IDE prompted me to upgrade, but after resolving many issues, it's now suggesting that I downgrade. I feel like I'm going in circles.
Can you provide a compatible sample for my project or recommend effective solutions?
Thanks in advance,

timtay-microsoft · 2023-11-02T18:26:44Z

Closing as stale

AlanPintor-git · 2024-01-30T19:21:53Z

Dear Azure Team,

I am reaching out to reopen a previously raised issue regarding the Azure SDK upgrade for our Android application. Despite earlier efforts, we continue to face challenges in this process.

Our main difficulty lies in the absence of detailed documentation. The available "Quickstart" guide only offers an APK, which unfortunately does not meet our needs as it lacks the source code.

To facilitate a smoother upgrade process, could you kindly provide us with the Android source code or a simple demonstration? Specifically, we are looking for a way to send telemetry data to Azure IoT Central from an Android device.

Your assistance in providing these resources would be highly valuable in helping us resolve the issues we are encountering.

Thank you for your attention and support.

AlanPintor-git added the question label Aug 15, 2023

github-actions bot added the IoTSDK label Aug 15, 2023

AlanPintor-git mentioned this issue Aug 15, 2023

Assistance Required in Connecting Robot to IoT Central with Specific Project Settings MicrosoftDocs/azure-docs#113519

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timtay-microsoft closed this as completed Nov 2, 2023

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Assistance Required in Connecting Robot to IoT Central with Specific Project Settings #1735

Assistance Required in Connecting Robot to IoT Central with Specific Project Settings #1735

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