IoT Central Web App Authentication
Recently, I was working on a IoT web application in Microsoft Azure and had the following architecture in mind: An IoT Central instance receives sensor data via MQTT but instead of using Power Platform or […]
AWS K8S Cluster for IoT (Part 2)
by christian
In our previous article we started building a kubernetes cluster in AWS to run InfluxDB and Grafana. We were aiming towards the following architecture: ESP32 based sensors are transmitting their humidity and temperature values via […]
AWS K8S Cluster for IoT (Part 1)
by christian
In the previous articles, we created: The resulting infrastructure serves its purpose but has few drawbacks: To resolve these issues, this article explains how to run InfluxDB and Grafana in an AWS kubernetes cluster. We […]
Automate IoT Infrastructure Creation
by christian
This is the second article in our IoT series. The first one covered the development of a temperature / humidity sensor as an edge device. The standalone sensor is only accessible via REST from a […]
Temperature and Humidity IoT Sensor
by christian
This is the first article in a series about Building a temperature and humidity sensor as an embedded IoT device Setting up cloud infrastructure to store and visualize its data In this article, we will […]
Bitmap Rotation on AmigaOS Part 2
by christian
This is the second part of my blog article about bitmap rotation on AmigaOS. In the first part, we covered the necessary boiler plate code: Hiding the mouse Paint a bitmap on screen Convert bitmap […]
Bitmap Rotation on AmigaOS Part 1
by christian
I am currently trying to make on an old dream come true: Writing a demo for the Commodore Amiga in C (using AmigaOS APIs instead of direct hardware access). First challenge was handling the blitter […]
Writeup for Pwnable.tw #6
by christian
During Christmas, I had some spare time, decided to give pwnable.tw another try and began solving challenge #6: You can connect to a service using nc chall.pwnable.tw 10101 The service binary dubblesort and its libc […]
Writeup for Pwnable.tw #4
by christian
Last reversing CTF was so much fun, I started directly with the next challenge. For me, it was a very hard one and it took me several weeks (although I recognized, after reading other peoples […]
Writeup for Pwnable.tw #3
by christian
On our last hackathon, Malfunction, Scotch and me tried to beat several CTFs. This article sums up the results of challenge #3 on pwnable.tw. The basic settings are: A calculator service runs on chall.pwnable.tw, port […]