Raspberry Pi
From charlesreid1
A guide to hacking on the Raspberry Pi, a microcomputer that runs a full stack Linux OS, all on a mobile processor:
Installing
The page containing instructions for installing an operating system on the Raspberry Pi is over at RaspberryPi/Installing
Interfacing with Headless Pi
If you are running a headless Raspberry Pi, you can follow these instructions for modifying the Raspberry Pi boot sequence so that you can find your Pi on a network: RaspberryPi/Headless
First Steps with Pi
You can find a guide to your first steps with Raspberry Pi, mainly covering the setup process for Raspbian Linux: RaspberryPi/First Steps
Run Web Server on Pi
You can find a guide to running a lightweight web server with Flask or something similar over at RaspberryPi/Web Server
Raspberry Pi Projects
Raspberry Pi Timelapse Photo
Software
Since I hadn't connected my Pi to the net in a while, the first thing I did was to update the package manager:
sudo apt-get update
Next, I upgraded the operating system:
sudo apt-get dist-upgrade
With all of the updating and upgrading out of the way, I moved on to the actual Raspberry Pi camera itself. There is a Python module to control the Pi camera, available through aptitude:
sudo apt-get install python-picamera python-picamera-docs
However, I was still not able to use my camera, because I had to run the Raspberry Pi configuration program. To run it:
sudo raspi-config
You enable the Raspberry Pi camera in the configuration menu.
Setup
The setup I had used one of these as the camera. This is a whopping 5 MP, which is as good as a point-and-shoot, except it's extremely tiny. I was able to get it hooked up to my Raspberry Pi and working just fine with the above steps.
You can use Python code to trigger the camera to take a picture, and you can specify a filename to save to. Here's a quick script I hacked together to take a picture every 2 seconds, and save it to sequentially-numbered files (0001.jpg, 0002.jpg, etc.):
# pic.py
import picamera
import time
camera = picamera.PiCamera()
i = 0
while True:
filename = "%04d.jpg"%(i)
camera.capture(filename)
print "Saving photo to %s"%(filename)
i += 1
time.sleep(2)
To run this, I use screen. I log in remotely, then run the screen command. In that screen I run python pic.py. It will print out as it progresses. Running it with screen allows you to disconnect and leave the Pi unattended.
Hello World LED Circuit with GPIO
This project controls a simple LED circuit with the Raspberry Pi's onboard GPIO cable. A python code is used to send high/low voltage signals to pins on the GPIO, and make an LED on a breadboard blink.
Kali Linux on Raspberry Pi
Getting deeper into the world of networking and using the Pi to analyze networks: Kali Pi