Program python3 jadwal on/off lampu realtime. Menggunakan GPIO raspi, Relay, dan Library RPi.GPIO

RasPi-Jadwal_lampu.py

#!/usr/bin/python3

'''
jadwal_lampu.py
rev. 2 17/03/2017
program untuk on/off lampu secara realtime sesuai jam yang ditentukan.
menggunakan library RPi.GPIO.

PIN nomor 40 digunakan untuk trigger relay (Gunakan driver relay seperti transistor)
'''

import RPi.GPIO as GPIO
import datetime
from time import sleep

GPIO.setmode(GPIO.BOARD)

relay_1 = 40

jam_nyala = 18
jam_mati = 21

status_on = 0
status_off = 0

def setup():
    GPIO.setup(relay_1, GPIO.OUT)
    GPIO.output(relay_1, GPIO.LOW)

def loop():
    now = datetime.datetime.now()
    
    global status_on
    global status_off
    
    if ((now.hour >= jam_nyala) and (now.hour < jam_mati)):      
        if (status_on == 0):
            GPIO.output(relay_1, GPIO.LOW)
            print(now.hour,":",now.minute,":",now.second)
            print("sekarang jam untuk menyala")
            status_on = 1
            status_off = 0
        
    if ((now.hour >= jam_mati) or (now.hour < jam_nyala)): 
        if (status_off == 0):
            GPIO.output(relay_1, GPIO.HIGH)
            print(now.hour,":",now.minute,":",now.second)
            print("sekarang jam untuk mati")
            status_on = 0
            status_off = 1

try:
    setup()
    while True:
        loop()
        sleep(1)

#except KeyboardInterrupt:
except:
    GPIO.cleanup()
        

Setelah dikoreksi oleh teman-teman pegelwrt, maka saya edit scriptnya