See It: http://solarpi.tafkas.net
More Details: http://blog.tafkas.net/2014/11/19/solarpi-a-flask-powered-photovoltaic-monitor/
excerpt from the blog post…
After collecting some photovoltaic data using PikoPy and a some readings from the residential meter it was time to put everything together. The data is collected by a couple of scripts triggered by a cronjob every five minutes.
$ crontab -l
*/5 * * * * python /home/solarpi/kostal_piko.py
*/5 * * * * python /home/solarpi/collect_meter.py
*/15 * * * * python /home/solarpi/collect_weather.py
The results are then written into a SQLite database. I chose SQLite over PostgreSQL for its lighter footprint on the Raspberry Pi. And since we will have no concurrent writes SQLite should be capable serving as a database backend.
The sole purpose of the web application is to fetch data from the database and render the results. I decided to use Flask, a microframework for Python based on Werkzeug and Jinja 2. For the Frontend I used the Bootstrap based SB Admin 2 Theme.
(continue reading at link above)
Create a box that only opens when the right person looks at it!
Source: Raspberry Pi Face Recognition Treasure Box
Add RFID/NFC read and write to your Pi in an hour!
FYI: NFC = “near field communication”…
Near-field communication (NFC) is a set of communication protocols that enable two electronic devices, one of which is usually a portable device such as a smartphone, to establish communication by bringing them within 4 cm (1.6 in) of each other.
more on Wikipedia
View project at: Adafruit NFC/RFID on Raspberry Pi
Learn how to remotely monitor your beer fridge on the web using a Raspberry Pi computer and a Nintendo Wii balance board…
Source: Create a Smart Beer Fridge with a Raspberry Pi | Make:
When it comes to this $35 microcomputer, the real question might be, what can’t you do with it?
Here are twelve tutorials for taking your Raspberry Pi to the limit. You’ll find that you can automate your home, design your own devices, and perhaps even save a lot of money (that is, if you don’t suddenly feel the need to buy twelve new Raspberry Pis)…
Source: 12 Cool Projects For Your Raspberry Pi – ReadWrite
You built a functional VPN server! Now what?
Welcome to Part Two of1 ReadWrite’s Raspberry Pi VPN server tutorial!
By now, it’s pretty apparent that turning your Raspberry Pi into a Virtual Private Network is an all-evening activity. But as security flaws further compromise our Internet lives, it feels increasingly worth it to have a secure server on your side. That way, you’re free to write emails and transfer data without worrying about what or whom might be intercepting it as it travels from your computer to the Web…
Continue at: Building A Raspberry Pi VPN Part Two: Creating An Encrypted Client Side – ReadWrite
Trust no one and build a server that encrypts your Web data from prying eyes.
I read several different tutorials and cobbled together the results into this semi-coherent tutorial for setting up a VPN on Raspberry Pi, which even I can understand, complete with the why behind the how. Most prominently, I relied on Eric Jodoin’s VPN tutorial for experts, and dumbed it down for me.
So follow me down the cryptography rabbit hole and learn that no matter how paranoid you are, whoever came up with the methods to generate VPNs was even more so…
Continue at: Building A Raspberry Pi VPN Part One: How And Why To Build A Server – ReadWrite
Learn how to access *multiple cameras* (including USB webcams and the Raspberry Pi camera module) using your Raspberry Pi, Python, and OpenCV.
Best of all, our implementation of multiple camera access with the Raspberry Pi and OpenCV is capable of running in real-time (or near real-time, depending on the number of cameras you have attached), making it perfect for creating your own multi-camera home surveillance system…
Continue at: Multiple cameras with the Raspberry Pi and OpenCV – PyImageSearch
Maybe you picked up a Raspberry Pi for the holidays, or you’ve been sitting on one of the super versatile, palm-sized computers for a while now. If you’ve been wondering how to get started with yours, or what you could build that’s worthwhile, here are ten great ideas…
Continue at: Top 10 Raspberry Pi Projects for Beginners