13. Relay controller sample code
import RPi.GPIO as GPIO
import time
pins = [22,23,24,25]
for p in pins:
GPIO.setup(p, GPIO.OUT)
while True:
for q in pins:
GPIO.output(q, GPIO.HIGH)
time.sleep(5)
for q in pins:
GPIO.output(q, GPIO.LOW)
time.sleep(5)
18. Sensor sample code
pin = 17
GPIO.setup(pin, GPIO.IN) # make GPIO pin for input
state = GPIO.input(pin) # read GPIO pin
while True:
time.sleep(1)
r = GPIO.input(pin)
if (r != state):
state = r
print "state changed"