Different approaches to list open network connnections on your Linux server

Often we have good reasons to ask, who is connecting to our server or what process is using which port? There are some simple ways to verify that. A good start is always the NETSTAT command. Shell netstat -tn tcp 0 0 10.10.10.228:46057 74.125.135.139:443 ESTABLISHED tcp 0 0 10.10.10.228:44840 64.91.231.216:80 TIME_WAIT tcp 0 0 10.10.10.228:52012 ...

Lazarus part of my Templogger done 3

Lazarus part of my Templogger done
I had quite a fight with the TAChart component in Lazarus. For all who don’t know about Lazarus, it is a free Delphi alternative which runs on various platforms. A good thing about Lazarus is, that you can play around with the components you drop at the form already within the design process. So the ...

The magic of SQL

The magic of SQL
I am still working on my Temperature Logging project with the RaspberryPi mentioned here. The Raspberry is collecting the data and stores it in a MySQL database. Each hour, it does 5 measurements. My plan is to visualize these measurements in a little program I want to write with Lazarus. Lazarus got the TAChart component ...

Temperature and Humidity Logging with RaspberryPi 4

Temperature and Humidity Logging with RaspberryPi
After a long time with all my RC stuff, I got interested to do something with the RaspberryPI. I am using one already a media center but that was not really a challenge. Motivation was to solve a problem we have at some of our customer sites. Here in a tropical environment, working air conditions ...

“Amount to Words” and a Revival for a twenty year old book

Other than in my home country Germany, Cheques still play a big role here in Malaysia. Its been a pain to fill them out and frequently there’s an error and trouble with the bank. An idea was born, I need to write a software doing that job for us.  Well I am more into PHP ...

Cheap DIY FPV Goggles

Cheap DIY FPV Goggles
The prices of FPV goggles are insane. Why do we have to pay more than $250, for two tiny screens in a piece of plastic? I have no idea. There are some cheap goggles out there, for around $120, but they are using low resolution screens. So for a decent solution, you need to spend ...

Brief test flight with GoPro 3 onboard of my DJI F450

Here a video of a test flight using my DIY camera mount.

GoPro 3 mounting made from its packaging

GoPro 3 mounting made from its packaging
As soon as I got my GoPro 3 I wanted it to be mounted on my DJI F450 frame. Thats the multicopter I am using most of the time, it just flies so beautiful and never gave me any headache. The way I assembled the frame, was a bit unfortunate. The extended space from the ...

Got today a GoPro Hero 3 White – here a little review

Got today a GoPro Hero 3 White - here a little review
Since I started with multicopters I was looking for the GoPro Hero. At that time it was the GoPro Hero 2. In the meantime we got the Hero 3 in three different “tastes”: * GoPro Hero 3 White $199 * GoPro Hero 3 Silver $299 * GoPro Hero 3 Black $399 The Black Edition is ...

RaspberryPi arrived (or my new XBOX)

RaspberryPi arrived (or my new XBOX)
Already in October 2011 I became aware of the RaspberryPi. I waited eagerly (like many others) for it, to become available before the end of 2011. But that didn’t happen. And when it was available, it was immediately sold out due to pre-orders. I hate to pre order. Finally I was able to buy the ...