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Monitor software version changes with Huginn

Huginn is a great piece of software, but the documentation is ... a bit sparse. Especially when it comes to details of the agents. I'm going to blog about a couple more more examples in the future.

For another project I'm using Leaflet, a JavaScript library for rendering maps in a browser. New versions are released occasionally, and I want to know when it's time to update the project website. Huginn can do that.

 

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Audio reminders in openHAB

A while ago someone mentioned "reminders" used in their home audio system, and I took that idea and implemented something similar in openHAB.

The basic idea is that I can send scheduled notifications to any audio sink openHAB is using, possibly more than one audio sink for one message. Also I want to differentiate between a simple audio sound, and text output.

For the text audio output I installed Text-to-Speech a while ago, this enables the ability to output text as audio in different languages. In addition I want an information when a reminder is "fired" in my Telegram control channel. As audio sink I'm mostly using ChromeCasts here, but anything openHAB can connect to is usable here.

 

 

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Monitor website status with Huginn

After setting up Huginn, and implementing the actions on my todo list, I had a look at the available agents and started thinking what else they can be useful for.

One of the ideas I came up with is monitoring if a website is available, or has some trouble. I already have a monitoring system in place, but it's a nice exercise to learn more about the other agents.

 

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Huginn: Filter Retweets

A while ago I started using Huginn, as a replacement for IFTTT. That's going quite well. Huginn offers more features, integrations, and especially your chains (scenarios) can be as complex as you wish. IFTTT is quite limited in this area.

I use the Twitter integration to find certain Tweets. Now this does not only find native Tweets, but also finds every Retweet made for a native Tweet. Obviously I am not interested in duplicate content.

Huginn offers a way to filter out Retweets.

 

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Traveling in Cuba (offline)

In 2019 I was in Cuba for a conference that took place there.

During the preparation of the trip it occured to me that internet access in the country is on the one hand slow and not well developed. On the other hand, that mobile internet access via roaming is obscenely expensive. It was foreseeable that I would have to do without mobile internet for a week, and consequently without online navigation. Preparations are in order.

 

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Google Summer of Code 2020 - Intermediate status update

The three PostgreSQL projects for this year’s Google Summer of Code are on track, and making good progress. All projects expect to finish on time.

Performance Farm

The data gathering for performance farm members is completed, as well as the new implementation for the JSON data transfer. The project iteratively updated it’s goals, and adjusted for newly identified UI issues.

Current work centers around making the website more pretty and useful, as well as reducing the number of used JavaScript libraries. The next step is presenting the work to the PostgreSQL Community for broader feedback.


PL/Java build system

The PL/Java project has just merged (PR #288) the first major pull request of new code from GSoC, creating a new plugin for the Maven build system that allows its actions to be guided by script snippets clearly exposed in the build files.

The same effect was formerly achieved by a workable but brittle combination of an existing Maven plugin that could handle most of the build requirements with another plugin that was able to run Ant, which was able to run scripts. That resulted in a non-ideal division of labor, where a good deal of build logic was hidden away inside plugins, while some parts were exposed in script out of necessity, rather than because they were interesting or likely to need adjustment.

This pull request proves the concept of a new plugin where the hardcoded Java portions are the uninteresting building blocks, and the overall logic of the build is clearly exposed in script.

For now, the new plugin is used to retire the maven-javadoc-plugin and remove the constraints it had imposed on the project's javadocs (such as the need for absolute URLs for intermodule references, making the resulting tree hard to preview or relocate).

Work continues to reimplement the C native build and retire the nar-maven-plugin and maven-antrun-plugin, to be delivered in a future PR.


WAL-G Performance

We’ve just completed the decoupling of the complex WAL-G internal class. Thanks to it, the new functionality developed in July for a more intelligent backup creation process can now be safely integrated. This feature involves major changes so it requires time to verify that everything is working as expected. We plan to finish the integration in parallel with working on other features.

Currently, we are working on merging the new series of commands for the WAL archives that have been uploaded to storage. These commands will allow end users to analyze the storage for any missing WAL segments that may prevent performing a PITR. Also, Dan now is in the process of implementing the last feature and he expects to finish it on time.


Thanks to all mentors for the status update!

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Unterwegs auf Kuba (offline)

2019 war ich auf Kuba, für eine Konferenz welche dort stattgefunden hat.

Bei der Vorbereitung der Reise stellte sich heraus dass der Internetzugang im Land einerseits langsam ist, und nicht gut ausgebaut. Und andererseits dass der mobile Internetzugang über Roaming obszön teuer ist. Es war also abzusehen dass ich eine Woche ohne mobiles Internet auskommen muss, und demzufolge auch ohne online Navigation. Vorbereitungen waren notwendig.

 

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openHAB, Telegram Bot and quoting URLs

A while ago I integrated DWD warnings (Deutscher Wetterdienst) into our home automation system, and receive severe weather notifications ever since then. That works quite good, but it was missing a weblink with more details - or if you want to forward the warning to someone it would be useful to have a link to the warning as well. The DWD binding does not provide that piece of information, but it is easy enough to add - or so I thought.

 

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Text-to-Speech in openHAB

In my ongoing endeavor to improve our home, a while ago I added a notification when the washing machine and the dryer are finished. The notification is send to a Telegram channel. Over the summer vacation I added a number new ChromeCast Audio devices (Google no longer offers the Audio CC, if you need one get one now). One is placed in the kitchen. Not only can I listen to music while eating breakfast, I can also output notifications, by using the CC as an audio sink in openHAB.

To make that useful, I decided to use a Text-to-Speech system. openHAB offers a couple different TTS systems, however most of them need a cloud integration, and therefore a working Internet connection. The "Pico TTS" works standalone, and was my favorite choice for this implementation.

 

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openHAB and Tankerkönig gas prices + Telegram integration - Second iteration

In my previous blog post about "Tankerkönig" I explained the details of how to integrate this binding into openHAB and provide a Telegram interface.

Someone on the openHAB community forum pointed out that Telegram bots allow queries, where one can present the user with options, and the user only has to click on one of the options. That makes it easier to use, and less typing is required as well. I went ahead and implemented that.

 

 

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