We’ve already seen how to create a simple socket server in Python, but sometimes we need to handle multiple incoming requests simultaneously, that require processor-heavy computation from the server. That’s what a threaded socket server can achieve.
The ESP8266 is an amazing microcontroller that includes a Wifi chip, for a very low price (about $15 for two on Amazon). It offers enough resources to make it the ideal microcontroller choice for most Internet of Things projects. There are several ways to program it, including but not limited to, pseudo-C++ with the Arduino IDE, LUA scripts or MicroPython. In this tutorial we will learn how to set up the ESP8266 with a MicroPython firmware, making it possible to run MictoPython scripts.
In this tutorial we’ll learn how to install Mosquitto on a Raspberry Pi. The goal is to use the Raspberry Pi as a MQTT broker in an IoT application. We’ll install Mosquitto, configure it and test it to make sure everything was correctly set up.
One of the most popular articles on this website is the tutorial on how to build a 5V power supply on a breadboard. Following up on that, today we’re going to build a power supply that can output both 3.3V and 5V at the same time. This is particularly useful for circuits where both voltages are needed. We will solder the components on a small protoboard, which will conveniently plug directly into the power rails of our breadboard.
The basic version of Nano that comes with Mac OS X doesn’t support syntax coloring, and it’s pretty hard to find clear information online about how to enable it. Here is a quick guide on how to enable syntax coloring in Nano on Mac OS X.
Sockets are one of the most commonly used communication tools on computers, but they can be hard to understand at first. If you break it down however, it’s easy to understand how to use them. In this tutorial we’re going to learn how to implement a simple socket server in Python, that will accept a single client connection.
In this tutorial we will focus on logging keyboard events using the Pynput library in Python. I have a Raspberry Pi that I use without a keyboard or mouse, and that is plugged in to my TV. As I mentioned in this tutorial on xdotool, my end goal is to play old games with RetroPie. The only problem is that it’s impossible to control the games over SSH. One possible solution that I found, is to use my laptop to send keyboard events to the Rasperry Pi’s OS.
In some situations, it can be useful to simulate user events on a keyboard or mouse, without an actual keyboard or mouse. The original idea that made me look into this subject, was that I wanted to run RetroPie on my Raspberry Pi with different ways to control the system. Instead of a keyboard, I wanted to use GPIO inputs (buttons or joysticks), or even a web interface that I could access from my phone. We’ll use a program called xdotool to do this.
The Raspberry Pi is a small single board computer that was originally intended for education and developing countries. In the last 5 years, it achieved way more than this, as it is now one of the best and easiest platforms for tinkerers and DIYers. It is basically a full Linux computer with a small form factor and energy consumption, making it ideal for homemade projects. Most of the time, you can use the Raspberry Pi as a headless machine, without a monitor, keyboard or mouse, and just use Telnet or SSH to access it. This considerably reduces the total cost of a project, as there will be no need to buy a screen, keyboard or mouse. However, the tricky part of this setup is the first installation of the OS. In this tutorial we’ll learn how to set up a Raspberry Pi in a fully headless way.
When working with a Raspberry Pi, it is often convenient to give it a static IP address. For example, if you use it as a DNS server to block ads with Pi-Hole, you don’t want its IP address to change over time. Let’s learn how to give your Raspberry Pi a static IP address!