One of the most important features in quantified self is the ability to export your data in an open format. Fitbit lets you download your personal data if you subscribe to a premium membership. Alternatively they provide an API at dev.fitbit.com/ that allows developers to interact with Fitbit data in their own applications, products and services. In a blog post at quantifiedself.com Mark Levitt shows a way how to export your Fitbit data into Google Spreadsheets.

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If you are overclocking your Raspberry Pi or you just curious how hot this little guy gets, there are two ways to get the internal temperature. Assuming you are running Raspbian as your operating system. Method 1: $ /opt/vc/bin/vcgencmd measure_temp This gives you the temperate in in degrees Celsius: temp=54.1'C Method 2: If you need the temperature to be more precise (e.g. storing it in an database or for further processing) use the following command:

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If you log into your Raspberry Pi using ssh it will prompt you for a password. Having to do this multiple times a days this is very annoying. To ease the pain, and enhance security, you can use public key authentication instead. Therefor you create a pair of keys on your client, and store the public key on your Raspberry Pi. Then you set up an authentication by key. Afterwards the user can login into the Raspberry Pi using his private key.

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In order to visually enhance my temperature logging I added some Javascript that computes sunrise and sunset for the 24h, 28h, weekly and monthly chart. Then I use this information to plot vertical bands on the chart indicating the effects of the sun on temperatures (and humidities): To add the bands to your Highchart just get the sunrise and sunset value for a particular day and push it on the xAxis.

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**tl;dr Checkout the charts on my RaspberryPi ** For quite a long time I was looking for a way to monitor and record th temperature and humidity at my apartment. What was missing was a convenient, preferably wireless solution. After receiving my RaspberryPi I started to look into that more intensively. USB-WDE1 Receiver The USB Weather Data Receiver USB-WDE1 wirelessly receives data from various weather sensors of ELV at 868 MHz.

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Once you have set up your Raspberry Pi chances are that you want to access it from remote machine or host a little web site on it. The problem is that your provider usually gives you a dynamic IP, which changes every time you connect to the Internet. In Germany most (A|V)DSL provider reset your connection every 24h. The solution for this is a dynamic DNS (DDNS), which automatically updates the name server in the Domain Name System (DNS).

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A couple of years ago I was on a trip to Budapest with a couple of friends. While roaming the streets we were passing by a casino and my friend insisted that there was a perfect strategy that would only lead to winning at roulette tables. Curious as I was I had him explain his theory. The system basically works as follows: First, you place a coin on red. If red wins, take your winning and start over.

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Recently I ran the St. Pat’s 10 Miler in Atlantic City, Nj. It was my first official running event ever and I enjoyed it lot. Shortly after the race the official results have been posted on the Internet. The data did not only include the number and times of the participants but also gender and age. Looking at the finisher time distribution it shows that most runners finished at around 90 minutes:

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Christian Stade-Schuldt

Data Engineer @ HERE IoT innovation lab| Full-time geek | Cyclist | Learning from data

Data Engineer @ HERE

Berlin, Germany