Setting up IPv6 using a DHCP client

Our ISP (internet service provider) finally started offering IPv6. On the server, I received static configuration. Here, they are using DHCP6 with prefix delegation and it isn’t as straightforward as one would expect.

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Posted in Linux, Server stuff | 4 Comments

[cz] Úvod do SQL

SQL je nejběžnější jazyk používaný pro práci s RDBMs (relační databázové systémy). Protože je užitečné umět pracovat s databází, septal jsem stručný přehled operací, které se pomocí SQL dají dělat na jednoduchých konkrétních příkladech, s odkazy na další zdroje.

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[cz] Generátor bankovního čísla účtu

Aby se předešlo překlepům a nechtěné platbě na cizí účet, využívají číšla účtů v ČR formát podle vyhášky č. 62/2004. V tomto článku je odkaz na generátor validních čísel.

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A few important things to know for Linux beginners

A few things I didn’t know about Linux at the time I was primarily using Windows.

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Power Bank 5000mAh Solar Charger Reverse Engineering & Modification

I bought a cheap solar power bank from China to power my temperature sensor. Unfortunately it was shutting itself down once fully charged, requiring me to power on manually again. In this post I will show you my reverse-engineering notes, images and what I did to make it always powered on.

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Micronova Pellet Stove LCD Reverse-Engineering

While trying to find out a way to communicate with my pellet stove I decided to have a look at the LCD communication and maybe learn something new and have fun. It is a segment LCD and maybe you find this useful, especially when designing your own control panel or reusing the LCD from a broken panel.

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Controlling Micronova pellet stove motherboard – Stufe a pellet Aria Idro IR telecomando seriale

Here is how to control a pellet stove with a Micronova controller remotely either via IR commands or using the serial line.

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Posted in Arduino, Electronics, Programming | 186 Comments

SSH Tricks You Must Know

Here are some general SSH tips and a short guide for setting up an SSH connection from Mac to iOS devices.

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How to make RaspberryPi truly read-only, reliable and trouble-free

RaspberryPi is a nice, small device which can be used for various automation purposes, internet of things or as an advanced camera. I have been using 5 RPis as a camera with motion detection and post-processing. This application requires high reliability and it was a pretty long journey until all the issues were solved. Here I am writing the most important things I have learned so you don’t need to go through the same stuff again (my cameras were placed on a remote location, making the whole process more complicated).

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Posted in Electronics, Server stuff | 98 Comments

Reverse-Engineering DVR Protocol

Just a quick report of me trying to find out how DVR sends video data to the viewer over the network.

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