pylights/astral insteon light scheduler

manage_porch_light_today.py

#!/home/brad/ve/lights/bin/python

import pylights, sched, time

from astral import Astral
from datetime import datetime
from dateutil.relativedelta import relativedelta
from pytz import timezone


city = 'Indianapolis'
tz = timezone('America/Indianapolis')

depression_type = 'civil'

pylights.device_cfg_filename = '/home/brad/bin/insteon/devices.xml'
p = pylights.plm('/dev/ttyUSB0')



def safe_set_level(device, level):
    try:
        p.setLevel(device, level)
    except IOError as (errno, strerror):
        print "I/O error({0}): {1}".format(errno, strerror)

def lights_on():
    safe_set_level('porch', 100)

def lights_off():
    safe_set_level('porch', 0)

def seconds_until(dt):
    delta = dt - datetime.now(tz)
    seconds = delta.days * 86400 + delta.seconds
    return seconds if seconds > 0 else seconds + 86400

s = sched.scheduler(time.time, time.sleep)

a = Astral()
a.solar_depression = depression_type

c = a[city]
sun = c.sun(datetime.now(), local=True)

s.enter(seconds_until(sun['dawn']), 1, lights_off, ())
s.enter(seconds_until(sun['dusk']), 1, lights_on, ())

s.run()