Sunrise / Sunset calculation

get_sunrise.py

andrew@mythic:~$ cat bin/get_sunrise.py
#!/usr/bin/python

# calculate sunrise/sunset times for location
# Andrew Elwell <Andrew.Elwell@gmail.com> 2013-09-02

import ephem
import ConfigParser
import paho.mqtt.client as mqtt


config = "/home/andrew/solarmon.cfg"

settings = ConfigParser.RawConfigParser()
settings.read(config)

home = ephem.Observer()
home.lat = settings.get('general', 'lat')
home.lon = settings.get('general', 'lon')

#print home.lat, home.lon

sunrise = ephem.localtime(home.next_rising(ephem.Sun()))
sunset = ephem.localtime(home.next_setting(ephem.Sun()))

#print "sunrise: %s, sunset: %s" % (sunrise, sunset)

# lets publish to broker
broker = settings.get('mosquitto', 'broker')
client = mqtt.Client()
client.connect(broker)

client.publish("sunrise", sunrise.strftime("%Y-%m-%d %H:%M"), qos=0, retain=True)
client.publish("sunset", sunset.strftime("%Y-%m-%d %H:%M"), qos=0, retain=True)

solarmon.cfg

; config file for home

[general]
lat = 51.50081
lon = -0.14258

[mosquitto]
broker = 192.0.2.10