Raspberry PI 3
The Raspberry Pi 3 is a nano computer with 4 cores build on a single board. It is a NANO computer designed by the Raspberry Pi foundation in United Kingdom. The Raspberry Pi was created to stimulate the fundamental computer science learning at school. Build around a Boardcom ARM processor and including WiFi and Bluetooth technologies, the Raspberry-Pi is also well known for its 40 pins GPIO (General Purpose Input Output). Thank to the GPIO, user can connect extension board (named HAT) or devices / sensor to collect environmental data (or acting on the world). The design does not includes Hard Drive but use a microSD card to store the operating système and user files. Raspberry Pi® and its logo are trademarks from the Raspberry Pi foundation. See raspberrypi.org for more information or wikipedia ( fr.wikipedia.org/wiki/Raspberry_Pi ).
The Raspberry-Pi GPIOs (all versions)
The ODroid N2 GPIO