Monthly Archives: February 2017

Cleaned my keyboard

 in Hardware / Raised bed  tagged cleaning / hardware / keyboard / weekly picture by

This week I had the strong desire to clean my keyboard because it was really dirty and disgusting. The cleaning results are okay but the plastic is still bleached out because this keyboard is at least ten years old. The keyboard is even not listed at the discontinued section at the producers website but it still works fine. It even has one of these half inch wide DIN connectors. Currently I use a adapter to connect it to my computer to the PS2 port. My brother connected his keyboard to his smartphone with the following adapters: DIN to PS2, PS2 to USB and USB […]

Create a gps track, follow it with your phone and track your way

 in Biking / Raised bed / web  tagged gps / gpsies / oruxmaps / phone / web / weekly picture by

Last weekend we made a small bike tour with our eBikes. To prepare the planned route I created it online an loaded it to my smartphone. I don’t use my smartphone to navigate but I like it to use it like a map with the route painted on it. In this post I describe my solution to create a track and follow it with my phone. I recommend to read the documentation especially of GPSies and OruxMaps maybe you can find a better way than I. But currently I like the way it worked, especially the part with the QR code on GPSies which […]

Raised flower bed - 2017-02-07

How to deal with empty or missing fields in messages

 in Programming / Raised bed  tagged messaging / weekly picture / xml by

In the following post I want to discuss how to deal with empty or missing fields in messages from the perspective of the receiver. I will try to explain the problem with the following scenario. Scenario There is a ‘sending system’ which sends data in messages to a ‘receiving system’. In my example the sending system sends demographic data of persons to the receiving system. The sending system may be a patient registration system in a hospital and the receiving system a statistics tool. How the messages are sent is not relevant in this scenario but we can assume that the messages are […]