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Hackathons are great! The next one I am attending will be the electro:camp in Offenburg, in Germany, close to the french border. I think Trystan and Glyn will also be there as well as a number of cool hackers and makers, all interested in energy and automation.
Many great developments will result from this event and hope to see some of you there as well.
Here is the official website: www.elektro-camp.de