![]() # Automatically resize font size based on window size Root.attributes('-fullscreen', fullscreen) # Toggle between fullscreen and windowed modes # Global variable to remember if we are fullscreen or windowed ![]() On your Raspberry Pi (in your home directory, /home/pi), open a new document with the name clock.py: language:shellĬopy in the following code: language:python We'll use this program when we want to demonstrate how to start a program on boot that requires the X windows system (for example, you want to make a graphical dashboard that is displayed on boot). The next example that we'll use is slightly more complicated, as it relies on a GUI made with the Tkinter package. Connect an LED and a 330 Ω resistor between GPIO12 and GND on the Raspberry Pi. While external connections to hardware is not necessary to show how to run a program on boot, it can be a useful way to show that something is running in the background, even if you do not see anything on the screen. Understanding the Linux Boot Process (YouTube Video).An Introduction to the Linux Boot and Startup Processes.If you would like to learn more about it, check out these links: The Linux boot sequence is a fairly complex sequence of events, which can easily be its own article for another time. So, rc.local for a GUI program is not the right tool, and you should try another method. For example, using rc.local, while easy, does not give you access to the X server (the thing that gives you a GUI desktop). Note that any program (compiled, script, etc.) can be used, but choosing the right method for starting your script is important. In the rest of the tutorial, we will show starting Python programs on boot with two examples: blink.py and clock.py. If you aren't familiar with the following concepts, we recommend checking out these tutorials before continuing: If you would like a full desktop setup, we recommend the following: Suggested Reading ![]() If you plan to make a dashboard (or clock, as given by the example code in the next section), you will need a monitor and keyboard for your Pi. As such, it is a robust way to create and manage services that run in the background.Īt a bare minimum, you will need a Raspberry Pi, SD card, and power supply for this tutorial. networking, graphical desktop), or simply restart your program over and over again until it works. It is definitely the most complicated of the three, but it allows you to run before LXDE starts, wait until you have access to other processes (e.g.
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