User manual

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Slika 2.6: LED s tipkalom na Raspberry Pi.
2.3 GPIO s Python
Da lahko uporabljate GPIO-vrata prek programov Python, mora biti nameščena knjižnica
Python GPIO. V zgodnejših različicah Raspbian so morali uporabniki to knjižnico še ročno
nameščati. To danes več ni potrebno, pa tudi dostop ''sudo'', ki je bil včasih potreben, je
sedaj že stvar preteklosti.
2.4 Vklapljanje in izklapljanje LED
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Tako kot prikazuje naslednja slika priključite LED prek 220 Ω predupora (rdeč-rdeč-rjav) na
GPIO-vrata 25 (pin 22) in ne več neposredno na +3,3 V priključek ter povežite minus pol LED
prek letve za izenačitev potencialov preizkusne ploščice z vodnikom za maso Raspberry Pi
(pin 6).
Potrebne komponente:
1 x preizkusna ploščica
1 x rdeča LED
1 x 220 Ω upor
2 x priključni kabel
Naslednji program led.py za 2 sekundi vklopi LED in jo nato spet izklopi:
import RPi.GPIO as GPIO
import time