CraftShelter.de - All about our crafts

Common

19. April 2019 By cs-admin

I’m in the process of developing zcan, a software reading CAN bus messages from Zehnder ComfoAir Q series ventilation systems. I would like to streamline development on my laptop while the serial interface is attached to a micro PC close to the ventilation unit. That’s why I need a remote serial interface. Installation On Debian […]

Common

Building a small backend service with AWS Fargate with Route53 Service Discovery

7. September 2018 By cs-admin

I wanted to run a small backend API service used by another frontend facing service in a simple and stress free manner. This felt like the perfect opportunity to give Fargate a try. It is a fully managed docker container runtime provided by AWS and nicely integrated into the AWS ecosystem. Well it is early […]

Common

oAuth2 with JWT in python Tornado

20. July 2018 By cs-admin

Protect a python tornado web app with oAuth2 using JWT

Common

Install a specific Java JDK version with homebrew on Mac OS

16. February 2018 By cs-admin

Installing java the oracle way is somehow annoying and the Mac OS builtin java is also not that awesome. So I use homebrew for years to install java. The simplest approach is to just install it with ‘brew cask install java’ but this will install the latest available version. In my case this was java […]

Common

A simple example for scala type-class implicits

13. March 2017 By cs-admin

A nice article about implicits in Scala.

Common

Working with shape-files

26. October 2016 By cs-admin

How to work with shape files on AWS EMR with Spark

Common

Homebridge Apple HomeKit Adapter Service

19. September 2016 By cs-admin

I’m actually testing on how to control things in a house or flat with Apple HomeKit. It seems to be a pretty nice solution as one would expect from apple but it takes time for the vendors to adopt. After googling around I found out that there are already some projects on github using the […]

Common

Copy and paste plain text in Mac OSX per default

17. August 2016 By cs-admin

I sometimes want to copy and paste content from the web which is styled in a proper way for the website but maybe not for the destination I want to paste it to. Imagine a Numbers table where you collect TV models and some information around them to make some kind of comparison. Normal paste usually brings the […]

Common

Analyse dependencies in Scala sbt projects

17. June 2016 By cs-admin

One sometimes runs into problems with conflicting transitive dependencies. A dependency graph can help analyzing this. I use the sat-dependency-graph sbt plugin to help here. Just add to your plugins.sbt: addSbtPlugin(“net.virtual-void” % “sbt-dependency-graph” % “0.8.2”) Running sbt task dependencyTree will do it: sbt dependencyTree If you like a bit more fancy, use the following to create a visual […]

Common

Console JSON filtering with jq

10. June 2016 By cs-admin

Consider a long list of JSON objects where you want to filter for different criteria. jq can be a big help here. See the following data: [ { “lat”: 50.559985870799224, “lng”: 8.478780446017911, “price”: 400, “dist”: 67.0682275804, “exposeId”: “1”, “ownerSsoId”: “100”, “rooms”: 2, “area”: 74 }, { “lat”: 50.58170215982231, “lng”: 8.45889590837296, “price”: 400, “dist”: 90.9399454663, “exposeId”: “2”, […]