This cheatsheet shows the steps to a DIY project and was used to make my heater smart. This guide is only readable to technical people. In the past I worked with primitive setups like Arduino or tried to get an ESP8266 wifi relay working. In my opinion, too limited and only worth considering if you need analog or economies of scale. Therefor, all my DIY home automation have a Linux kernel. Read more

We all have data we value, but do we value our data? Do we organize, version control and backup our data? This overview is targeted at home users, not enterprise or governments, which require multiple access groups and clearances. Approach Before we start and make all our data redundant, we need to have everything organized. We want our data to be; easy to file easy to find clear naming conventions; e. Read more

Smart contracts enable us to do gambling with a fixed set of participants and choose our own risk probabilities. These participants could be wallets belonging to one and the same person. This will allow us to store the value inside the smart contract from December to Januari and legally have no value over that time period. This may seem scam. If you involve your spouse’s wallets, it is not a single person anymore, therefore not a scam. Read more

SAM of bitcoin.org/bitcoin.pdf We first present the different parts, before constructing the graphical representation of SAM (Scientific Argumentation Model) (based on sheets 21-23 ). Introduction Motive Why was the research done “A purely peer-to-peer version of electronic cash would allow online payments to be sent directly from one party to another without going through a financial institution.” “no mechanism exists to make payments over a communications channel without a trusted party. Read more

This tool has helped a colleague find his partner for life on a dating site. This post is a little shady. To get students excited for creating software, i.e. a creative art, we can give them creative assignments. Aim This post shows how to automate the pressing of a button on a website. Why? Tinder just announced they’re going live with a web version. By showing students a case where they can ‘cheat’, could get them excited for more coding. Read more

First lets get one thing straight. You have two groups, the angels and the daemons, white hat and black hat, hackers and crackers. Keep in mind, that the angels, the guys who find security holes and report them (what a sweet angel) are sometimes perceived as a daemon! The world is full of digital users, but the majority of people are ignorant fools when it comes to cyber security. For this reason, never call yourself a hacker, but a “Security researcher” or “Pen tester” (google it). Read more

This is an old post, nowadays I would recommend android.com/one We all know it, our phone is crappy and we want to upgrade it. For a lot of people this means a new iPhone, which I totally get, since the Android landscape is overwhelming. Of course BlackBerry and WindowsPhone are options, but since they have so little market share, you miss out on the good apps. TL;DR Buy a stock Android device, preferably a Nexus, or just get an iPhone. Read more

This is an old post, Scaleway does offer cheap 64bit VPSes now. Scaleway has a good deal with their ARM VPS. But there are some down sides.. One of them I have fixed (ufw). The other, getting to run docker on them, I have not tried to tackle. I’m currently satisfied, but may switch to OVH in the future, since their (same price) VPS has 64bit, which will run docker. Read more

This is an old post, nowadays I use a chromebook with a web IDE running on my server, which is set to dark theme. Some programmers use flux, which makes sense if you need to view pictures, but I prefer to invert the colors, system wide. Debian (ubuntu) sudo apt-get install xcalib and bind the following to your desired keyboard shortcut: xcalib -a -i #alter invert my current keyboard shortcut is SUPER (windows logo) + N (negative). Read more

Let’s talk about something that can benefit our lives. No, not online clothes shopping, but SSH to your Linux VPS! If the last sentence contained two things you needed to Google, then this article isn’t for you (it all comes down to remote desktop, but fast). As a programmer, I see myself as an artist. Coding is a creative process for me, which results in making creative notes all the time. Read more