By Matt Richardson, Shawn Wallace
What are you able to do with the Raspberry Pi, a $35 machine the scale of a bank card? every type of items! If you're studying the best way to application, or seeking to construct new digital initiatives, this hands-on consultant will convey you simply how precious this versatile little platform can be.
This e-book takes you step by step via many enjoyable and academic chances. benefit from numerous preloaded programming languages. Use the Raspberry Pi with Arduino. Create Internet-connected tasks. Play with multimedia. With Raspberry Pi, you are able to do all of this and more.
• Get accustomed to positive factors at the Pi's board
• research adequate Linux to maneuver round the working system
• choose up the fundamentals of Python and Scratch—and commence programming
• Draw portraits, play sounds, and deal with mouse occasions with the Pygame framework
• Use the Pi's enter and output pins to do a little hacking
• detect how Arduino and the Raspberry Pi supplement every one other
• combine USB webcams and different peripherals into your projects
• Create your personal Pi-based internet server with Python
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Additional resources for Getting Started with Raspberry Pi
Troubleshooting Errors Inevitably you’ll run into trouble with your code and you’ll need to track down and squash a bug. The IDLE interactive mode can be your friend; the Debug menu provides several tools that will help you understand how your code is actually executing. You also have the option of seeing all your variables and stepping through the execution line by line. Syntax errors are the easiest to deal with; usually this is just a typo or a misunderstood aspect of the language. Semantic errors — where the program is well formed but doesn’t perform as expected — can be harder to figure out.
Use the passwd command to change it, especially if you’re putting your Pi on a network. The Network Once you’re on a network, there are a number of Linux utilities that you’ll be using on a regular basis. When you’re troubleshooting an Internet connection, use ifconfig, which displays all of your network interfaces and the IP addresses associated with them (see Figure 2-6). Figure 2-6. The ifconfig command gives you information about all of your network interfaces. The ping command is actually the most basic tool for troubleshooting network connections.
There are two tricks that make life much easier in the shell: autocomplete and command history. Often you will only need to type the first few characters of a command or filename, then hit tab. The shell will attempt to autocomplete the string based on the files in the current directory or programs in commonly used directories (the shell will search for executable programs in places like /bin or /usr/bin/). If you hit the up arrow on the command line you’ll be able to step back through your command history, which is useful if you mistyped a character in a long string of commands.