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Questions tagged [kaa]

Kaa is a 100% open-source (Apache 2.0) middleware platform for rapid development of IoT applications and connected products.

Kaa offers a holistic approach for implementing rich communication, control, and interoperation capabilities into connected products and smart devices. On top of this, powerful back-end functionality of Kaa greatly speeds up IoT product development, allowing vendors to concentrate on maximizing their product’s unique value to the consumer. Kaa IoT platform is comprised of the server component and the endpoint SDK that is integrated into client applications.

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293 questions
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The error that can't send and receive event in Kaa cluster

I deployed 3 Kaa clusters follow the kaa Cluster setup guide document. The databases are MongoDB and MariaDB. When I run C Client(I make a code change that every client can login in three kaa servers in random) firstly, it can login in kaa server…
Huawei Xie
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can't get notification after reconnect to Kaa server

We have a 1 Kaa (version 0.9) cluster with 3 nodes. We found sometime the endpoint reconnect to Kaa node and it can't get any notification. The endpoint had subscribed all topics and we also confirm it in admin website. after it connect to Kaa and…
Naruto
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Fixed a bug that KAA-1594: error after attaching endpoint to user

The bug in kaa 0.10 have Influenced my application development. So I try to fix it.Then I Compared the code of the kaa 0.9 and kaa 0.10. I have found the differences in class EndpointServiceImpl of Kaa DAO interface modular:there are two methods of…
Huawei Xie
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mongodb Log Appender - optional field saving structure to MongoDB (Kaa 0.10.0)

I am using Kaa 0.10.0 and I have defined Log schema and created a MongoDB log appender. My question is when I upload a log record by client and save it to MongoDB by log appender, the optional field (driverLicenseNo, e.g.) json format would be like…
Xiangfeng Qi
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Trigger events using a Webapp in Kaa

I am working on a iot application using kaa. My goal is to implement a communication from my dashboard to the endpoints. I have generated events using event class families and successfully triggered events using that. I have generated events using…
siva
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Kaa Admin ReST client for java

There have been questions about the jar and dependencies of the REST capabilities, but I remember seeing that the documentation of future releases would include information on the admin-rest-client type. Which functions does the client support? I'm…
dariuskay
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error report "Can't update entity with version" of mongoDB

I am testing the performance of kaa Server. When I run 50 thousand of client , upload log every 10 seconds every client. 2016-11-18 09:06:22,235 [EPS-endpoint-dispatcher-50] ERROR o.k.k.s.c.n.m.d.AbstractVersionableMongoDao - [class…
Huawei Xie
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JVM Crashes while 25000 clients are accessing remote kaa Server resource

I run 25000 clients that just upload log to server every 1 second. The Server crashes in the process.From the log file, we found that the cause of the crash was the JVM crash.The Error log show : # # A fatal error has been detected by the Java…
Huawei Xie
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Support for selection of kaa application key during execution

I am making multiple clients accessing same Kaa application. Consider it as fork of a process. As I can understand, Kaa server differentiate b/w clients based on the hash which is part of kaa public key. So essentially, for having multiple clients,…
Abhishek Dwivedi
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Kaa REST api calls "404 not found"

I am working on the Kaa sandbox v0.10.0 deployed on AWS using the AMI provided by the Kaa download page. I am trying some of the sample calls described here : http://docs.kaaproject.org/display/KAA/Admin+REST+API and I always get an error with GET…
Ludwig Joffroy
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AWS Kaa Sandox Connection timed out from Application

I am always getting the connetion timed out error, when running application for AWS Sandbox for Kaa 0.10.0: Failed to receive operation servers list {} org.apache.http.conn.HttpHostConnectException: Connect to…
tmt
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Kaa Library for ESP8266 with Arduino IDE.

I am developing an IoT solution using ESP8266 (ESP12E) and programming using Arduino IDE. I came across Kaa lately and was exploring if it can be used to power our servers. As I understand, we can develop applications on top of Kaa while Kaa handles…
Hashin
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Where can i get the "admin-rest-client-0.10.0" java executable?

I need to use "admin-rest-client" java executable to call the KAA rest API from my java project. Is there any other external dependency required to add if I am using admin-rest-client.jar.
Mayur Patel
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What Should I Use (Notification/Events) To Send Data From Application Server To End Points (Devices) and vice versa Using KAA Middleware

As per the KAA references, I understand that once should only use the Notification feature, When it required to send data from server (External apps) to endpoints and Events are only used when there is a need for endpoint to endpoint communication…
Mayur Patel
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got the "Failed to get required buffer size" error message while connect to Kaa server by C SDK

We try to let our endpoint connect to Kaa server by C SDK. But, we get the error message like below. It seems the buffer size isn't enough?! Have any buffer size need to reset for our case?? This message didn't appear before. But, it seems to appear…
Naruto
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