HackLab: All about Arduino and its connections to the world

WARNING: We will NOT be in the usual Hacklab in the UPF library this time, but rather in room[masked] (also at UPF). I will post additional instructions on how to find us.
The meetup is an informal get-together for people interested in the Arduino/microcontroller/sensor-networks world, where people can learn, work together, help each other with their own or others’ projects. It’s a beginner-friendly group but it would of course be great if more experienced people could come to participate and/or show some of their projects.

The main theme of the meetup currently is home automation, using a network of Arduinos (and possibly other microcontrollers, etc.) in conjunction with OpenHAB running on a Raspberry Pi. We have tried using I2C for (wired) communication between Arduinos and RPi, and then moved on to other ways to communicate (wifi, bluetooth, zigbee, etc.) as well as other microcontrollers (ESP8266, etc.).