What are the options available to connect to solace from VB 6.0? Is it possible to establish this connectivity using AMQP 1.0 protocol?
Solace supports AMQP 1.0, MQTT 3.1.1 and REST.
You are free to use any third party libraries(or even write your own) that implements any of the above protocols to interact with a Solace message broker.
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I wanted to make use of Shared Subscription feature of MQTT v5. But currently I am using AKKA MQTT client which doesn't support MQTT v5 client. Can I still use v3 MQTT paho client and use Shared Subscription feature?
That should not be a problem as from the viewpoint of an MQTT v3 client a shared subscription is just like any subscription.
The broker has to do all the work regarding shared subscription logic.
The only hindrances I can see are:
that an MQTT broker might support v5 but not v3/v3.1.1
the broker doesn't support shared subscriptions in general (yes they exist)
the broker supports all MQTT versions but handles them as two different protocols (not sure if this is a thing)
Using paho client write an app(ensure that this will use MQTT v5) that will have two clients.
Client_v3 will subscribe to the topics from the source i.e. from the app that sends MQTT v3
Client_v5 will publish the received topics as it is received in the above step.
In your application where you want to use shared subscription(again ensure it uses MQTT v5) alter the topics $share/<topic> and make it to get the topics from the client_v5 publish
In simple word: make you paho client code to act as a broker between v3 and v5 apps.
I'm struggling with the IOT Central SDK to send reported properties to my IOT Central but so far I haven't found any way to do it.
Have anyone managed to perform this very task? I have no problem sending properties or events / telemetries but I've been struggling with this for a while with no results.
The Device Twins features are supported for devices with the MQTT or AMQP protocols to the Azure IoT Central (Azure IoT Hub).
For your requirement such as using a device in the iOS Application, I do recommend using the MQTT protocol directly to the Azure IoT Central (Azure IoT Hub) and some iOS MQTT client library, for example MQTT-Client-Framework.
For test purposes of the features how to use the MQTT protocol directly, you can use any MQTT client tools such as MQTTBox, MQTT.fx, etc.
The following screen snippets show an example of using the MQTT protocol directly to the Azure IoT Central, where the MQTTBox client updated a device1 reported property (name battery):
I am trying to connect to WebSocket API : http://kaboom.rksv.net/ using Socket.IO framework for iOS, i am banging my head to understand how to open the connection with this.
I have tried many possibilities and it did not work. Any help would be greatly appreciated.
If the server talks the WebSocket protocol, you have to use a WebSocket client library. On the other hand, if the server talks the Socket.IO protocol, you have to use a Socket.IO client library. Below is an excerpt from Socket.IO page in Wikipedia.
Socket.IO is not a WebSocket library with fallback options to other realtime protocols. It is a custom realtime transport protocol implementation on top of other realtime protocols. Its protocol negotiation parts cause a client supporting standard WebSocket to not being able to contact a Socket.IO server. And a Socket.IO implementing client cannot talk to a non-Socket.IO based WebSocket or Long Polling Comet server. Therefore Socket.IO requires using the Socket.IO libraries on both client and server side.
I am working on a device management solution for an IoT device. The device will host an LWM2M client. A gateway device (currently an Intel Galileo board), will host an OMA-DM client and a LWM2M server.
The general scenario is that the nodes should be able to be managed by any OMA-DM or LWM2M compliant device management server.
In case of an OMA-DM server, the commands will be sent to the gateway where they will be received by an OMA-DM client and passed on to the nodes directly as LWM2M commands or the client will use the APIs of the LWM2M server to create and send the message/command.
As such I wanted to know if there is any solution currently available that can help with this.
OR
Are there any guides or papers or any information of any kind to help me implement this solution?
OMA has something called the LwM2M gateway which interfaces an OMA-DM server to an LwM2M Server. So check out the MAI (Mobile Application Interface) gateway specs (which I don't think are finalized yet).
I am thinking of writing an Apple Push Notification server using Dart. Does Dart support client side SSL/TLS certificates?
Yes! Dart VM now supports SSL/TLS, and HTTPS.
See http://code.google.com/p/dart/issues/detail?id=3950 and http://code.google.com/p/dart/issues/detail?id=3593 which are now closed. :)
Dart supports SSL/TLS client connections using SecureSocket. It also supports secure server sockets using SecureServerSocket to (use this if you need to listen on a secure port on the VM).
Note that the ordinary HttpClient will automatically handle HTTPS for your browser connections so no extra code is needed in these cases.