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For sensors, display and other accesories, prefers those with I2C (TWI) interface. They make things easier, because all of them use the same pins A4 & A5, so you will never run out of pins. Also, always look for 3.3v/5v compatibilidad, because things are moving to the 3.3v zone.user31481– user314812017-06-29 15:01:15 +00:00Commented Jun 29, 2017 at 15:01
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