Model Based Testing – Ian Craggs
"We're made of star stuff. We are a way for the cosmos to know itself" – Carl Sagan
Eclipse SparkplugTM is a specification for increasing MQTT interoperability by defining topic and payload contents, and the interaction of devices and monitoring applications. It is being standardized at the Eclipse Foundation. Sparkplug was intended for industrial IoT applications but there is growing interest outside that application area. There are many resources for Sparkplug which you … Continue reading “Getting started with MQTT and Sparkplug”
Good News! The MQTT-SN standardization is progressing nicely. That isn’t to say at warp speed, but at a steady pace in the right direction with no significant obstacles so far. Of course, someone might decide to discover one in response to this article, but it’s better to know about any now if they exist. Looking … Continue reading “MQTT-SN Standardization Progress”
This discussion is part of the standardization of MQTT-SN at OASIS. Here is a summary of the current issues we are working on. The issue for authentication is 568. In the current MQTT-SN specification (1.2), there is no authentication capability included apart from the client id. This applied to the early versions of MQTT as … Continue reading “MQTT-SN Authentication”
I don’t know of any rigorous comparisons, mainly because up to now MQTT-SN has found only limited use. I think MQTT-SN could perform better than MQTT under certain circumstances but I wouldn’t say it’s likely as a blanket statement. First of all there are the different characteristics of UDP and TCP. TCP has the reliability … Continue reading “Can MQTT-SN out-perform MQTT?”
We are starting to work on the standardization of MQTT-SN – MQTT for Sensor Networks. The current specification for MQTT-SN is in a similar position to that for MQTT before it became a standard at OASIS; it is published by IBM, freely available with a liberal license, and has been in use for several years. … Continue reading “MQTT-SN Alignment with MQTT”
I’ve just finished off release 1.3 of the Eclipse Paho C client which includes MQTT 5.0 and WebSockets support. Another thing I’ve done is to update the command line utilities to be much more capable, so in this post I’ll describe how they can be used to connect to the IBM Watson IoT Platform using … Continue reading “Using MQTT V5 with the IBM Watson IoT Platform and the Eclipse Paho C client”
I’m almost at the end of implementing the changes to the Eclipse Paho C client that I described in an earlier post to support MQTT 5.0. I haven’t quite finished off the release yet, so I thought I’d allow a little more time for anyone to comment. I had to compromise in my naming of … Continue reading “Paho C Client – MQTT 5.0 and Command-Line Utilities”
I’ve started to write the new MQTT version 5.0 support for the Eclipse Paho C clients. As I’ve reached the stage where some very simple tests are running, I thought this was a good time to try to elicit some feedback. I’ve had to make some compromises in the API, balancing the minimization of disruption … Continue reading “The new MQTT V5 API for the Eclipse Paho C client”
The MQTT protocol has been around since the late 90s when it was created to enable the monitoring of a long distance oil pipeline. It went through several iterations before landing on version 3.1, published by IBM. The next step was standardisation, at the OASIS standards body. As anyone who has taken part in a … Continue reading “A Story of MQTT 5.0”
This question was posed to me recently, with the added observation that it seemed no progress had been made in the last two years. From my perspective this isn’t quite true. Although the specification is still maintained by IBM, no movement has been made to standardize it at OASIS like MQTT has been. That is … Continue reading “Where are we with MQTT-SN?”