Articles
Odroid XU4 server
Having one's own server provides the ability to run web services 24/7. However, having a computer running all the time can significantly increase one's electricity bill. The objective of this project was to build a low power home server capable of running common software (Apache, Node.js, etc.) while only consuming little power.
Light controller with PIR sensor
This is an IoT ceiling light controller which includes an HC-SR501 PIR motion sensor. It is built around a Wemos D1 mini (ESP8266 breakout board), which controls a homemade TRIAC breakout board. TRIACs provide the advantage of switching devices on and off silently, as opposed to a mechanical relay.
Serving web applications with Apache
Let's imagine we have a server with Apache2 listening on port 80. Since port 80 is used, other web apps, developed for example with Node.js, must use another port. Consequently, one would need to open a new port on one's router every time a new app is developed.
Users and groups in Linux
In linux, or at least Ubuntu, a user can be added using:
Credit card transactions web scraper
The company behind my credit card provides a web interface which includes a log of the transactions that have been made. The objective of this project is to automatically retrieve this log everyday and store its data in a database so as to display it on a custom dashboard.
IoT ceiling lights
An IoT RGBW LED controlled via MQTT with integrated motion and illuminance sensor.
IoT scale
Keeping track of one's body weight usually involves manually writing down measurements on a spreadsheet or similar. To automate the process, I removed the electronics of a cheap scale, keeping only the load cells, and replaced it with my own.
IoT Current consumption monitoring system
When you don't know how much power your air conditioner draws, it's easy to leave it running without feeling too guilty. And then the electricity bill comes...
IoT RFID reader
RFID is a conveninent technology for access control and authentication. In this project, I connected an RC522 RFID reader to an ESP32 in order to use it for IoT applications. Additionally, to provide feedback to the user, the ESP32 is also connected to an SSD1306 OLED display and a buzzer. I chose an ESP32 over an ESP8266 simply because of the amount of GPIOs required.
Docker images and containers management
Here are a few commands to manage docker images and containers