Articles

Using a key file can greatly increase security when connecting to a host via SSH. This article presents how to create such keys and configure hosts to use them.

Mounting a USB dock to the back of my laptop stand using 3D printed parts designed in FreeCAD.

With the COVID-19 and the introduction of remote work, a many Japanese companies were struggling with the approval of documents, since those needed to be physically stamped with one's personal seal named Hanko. I decided to solve this issue by creating a web application to keep track of approvals

With Vue.js, passing data to a child component is generally achieved using props. However, mutating props from a child component is generally considered bad practice. This short tutorial shows how to circumvent this constraint by using custom setters and getters on computed properties.

Although a wide variety of sensing devices can be envisioned for home automation systems, motion and temperature sensors are among the most widespread. This is mostly due to their low cost and simplicity of use. In order to equip multiple rooms of my apartment with such sensors, I designed a simple IoT sensing module that can easily be produced in any quantity.

A Node.js application which stores data from IoT devices sent over MQTT into an InfluxDB time-series database. It allows the management of multiple data sources into a MongoDB database.

I have been using this CMS for several years now and overall, it has served me well. However, as the GUI of the CMS was built as an single page application (SPA), meta tags and other SEO options could not easily be generated for each article.</p><p>To solve this problem, I rebuilt this GUI using Nuxt.js as as to leverage server-side rendering (SSR). Articles are now fetched from the CMS API server-side, which allows meta tags to be set before sending content to clients.

Managing one's body weight can be quite a challenge. And as the quote from Peter Drucker goes, "You can't manage what you can't measure". So, I built a body weight scale that can upload data to an API of my choice, which was the object of this article.

Smart lights are usually some of the first appliances to be added to a smart home. Although those can nowadays be purchased easily from various brands, I wanted to have my own hardware so as to integrate it better with other devices and software. Thus, I decided to an IoT LED controller that I can use in various projects where lighting has to be controlled via network protocols.

RFID tags come in various forms and sizes, from standard plastic cards to chips that can be implanted in one's hand. I got particularly interested in RFID rings, which can be purchased online for less than USD 20$. Those are based on EM4305 chips, which require a compatible reader. Thus, I designed an IoT EM4305 reader that can exchange data over MQTT with other devices.