編譯python檔在Pi上使用指令控制LED【w=亮；s=滅】
vim led_str_ctrl.py
按i並貼上底下程式碼：
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#!/usr/bin/python
import RPi.GPIO as G # reference the GPIO library
G.setmode(G.BCM) # use the 'BCM' numbering scheme for the pins
G.setup(18, G.OUT) # Set pin 18 as an Output
while (True): # keep going around this loop until we're told to quit
key = raw_input("Enter 'w' for On, 's' for Off and any other key to quit. You'll need to press enter after each character: ")
if key == "w":
G.output(18, True) # Turn it on
elif key == "s":
G.output(18, False) # Turn it off
else:
break # leave our loop
G.cleanup() # Tidy up after ourselves so we don't generate warnings next time we run this
